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  • Tenergy Rechargeable 2500mAh AA Review

    Bargain basement price and performance What We Think The Tenergy Rechargeable 2500mAh AA batteries are nothing to write home about. They offer low prices and low battery life. If you are looking for long battery life, then go with the top pick in our recent roundup of rechargeable AA batteries. Or, if you are on a budget you can't go wrong with the Ikea Ladda, or Amazon Basics rechargeable AA batteries. Pros Rechargeable AA Extremely low price Cons Low battery life Where To Buy Amazon: Tenergy Rechargeable 2500mAh AA Technical Specs The following are the technical specifications of the Tenergy Rechargeable 2500mAh AA. Summary Capacity You can see how it stacks up against other rechargeable AA batteries here:

  • AmazonBasics High-Capacity Ni-MH 2400 mAh AA Review

    Excellent rechargeable AAs at an excellent price What We Think The AmazonBasics High-Capacity Ni-MH 2400 mAh AA batteries are a really great AA and a really great value. They provide a lot of battery life and work well in all types of devices. Combine that with their low price, and they are a great deal. While they couldn't quite out-last the top pick in our recent roundup of rechargeable AA batteries, their very attractive price and excellent availability make them a great budget choice. Pros Great price Great battery life Available in large quantities Cons Not the best performing rechargeable AA that money can buy Where To Buy Amazon: AmazonBasics High-Capacity Ni-MH 2400 mAh AA Technical Specs The following are the technical specifications of the AmazonBasics High-Capacity Ni-MH 2400 mAh AA. Summary Capacity You can see how it stacks up against other rechargeable AA batteries here:

  • Powerex Pro Rechargeable NiMH AA Review

    Too much money, not enough battery life What We Think The Powerex Pro Rechargeable NiMH AA batteries are too much money and not enough battery. Finishing near the bottom in our recent roundup of rechargeable AA batteries, but costing more money than some higher-performing alternatives, there isn't much good to say about these AAs. If you want a super long-lasting rechargeable AA, go with our best pick: Duracell Rechargeable AA Or, if you are on a budget you can't go wrong with the Ikea Ladda, or Amazon Basics rechargeable AA batteries. Pros They are a rechargeable AA Cons High price Worse battery life than several other options Where To Buy B&H Photo and Video: Powerex Pro Rechargeable NiMH AA Technical Specs The following are the technical specifications of the Powerex Pro Rechargeable NiMH AA. Summary Capacity You can see how it stacks up against other rechargeable AA batteries here:

  • Fuvaly Magnetic Rechargeable AA Review

    The longest-lasting lithium-ion AA we've ever tested, with a unique magnetic charging cable What We Think The Fuvaly Magnetic Rechargeable AA is a whole new type of rechargeable AA battery. Boasting the longest battery life of any lithium-ion AA we've ever tested, this battery is a top pick. And, with a very special magnetic USB for charging, it provides a unique charging experience. Compared to traditional rechargeable AAs, it charges faster (2 hours or less) and provides a steady, higher voltage for your devices. Unfortunately, it comes with 2 big downsides: The price: At $30 for a 4 pack, these high tech AAs are nearly three times the price of the Duracells. The special cable: If you lose the special magnetic charging cable that these batteries come with, you cannot charge them. Other lithium-ion rechargeable AAs use a standard USB input for charging, so you can use any USB cable. If you want a rechargeable AA that can be charged with any micro-USB cable, go with our high tech pick instead: Amptorret USB rechargeable AA Pros Excellent battery life Nice high voltage (1.5V) during the entire lifespan of the battery Built-in charging lights make it easy to know when the charge is complete Cons Needs a special magnetic USB cable. Does not perform a voltage step down to at the end of its life. This means that devices with a low battery indicator will simply shut off without a warning. Where To Buy Amazon: Fuvaly Magnetic Rechargeable AA Deep Dive This is not a typical rechargeable AA. In fact, it is a small lithium-ion battery like you would find in your phone or laptop with some circuitry to mimic a regular AA all wrapped up in a AA costume. This has a distinct advantage: Regular rechargeable AAs slowly decrease in voltage over time, causing the performance of your devices to fade. This may result in a remote control that needs to be a little closer to the TV, or flameless candle that isn't quite as bright, or a clock that runs a little slow. These special AAs though provide a constant voltage output over their whole life, allowing devices to operate just as well at the end of their battery life as they do at the start. Check it out: Notice how the lithium-ion rechargeable battery stays at 1.5V for its entire discharge, while the Duracell Rechargeable AA (a typical NiMH battery) falls below 1.3V less than a quarter of the way in. This higher voltage may help your devices run better. Technical Specs The following are the technical specifications of the Fuvally Magnetic Rechargeable AA. Summary Capacity You can see how it stacks up against other rechargeable AA batteries here:

  • Thunderbolt High Capacity NiMH Rechargeable AA Review

    Skip these What We Think The Thunderbolt High Capacity NiMH rechargeable AA batteries are too much money and not enough battery. Finishing mid-pack in our recent roundup of rechargeable AA batteries, but costing more money than some higher-performing alternatives, there isn't much good to say about these AAs from Harbor Freight. If you want a super long-lasting rechargeable AA, go with our best pick: Duracell Rechargeable AA Or, if you are on a budget you can't go wrong with the Ikea Ladda, or Amazon Basics rechargeable AA batteries. Pros Available at Harbor Freight stores Low cost Cons Worse battery life than several other options Where To Buy Harbor Freight: Thunderbolt High Capacity NiMH rechargeable AA Technical Specs The following are the technical specifications of the Thunderbolt High Capacity NiMH rechargeable AA. Summary Capacity You can see how it stacks up against other rechargeable AA batteries here:

  • Fuvaly USB Rechargeable AA 1500mAh Review

    A whole new type of rechargeable AA, with a very disappointing battery life What We Think The Fuvaly USB Rechargeable AA 1500mAh is a whole new type of rechargeable AA battery. With a USB port for charging, it wins huge points for convenience. It charges faster (2 hours or less), is easier to use, and provides a steady, higher voltage for your devices. Unfortunately, it comes with 2 big downsides: The price: At $27 for a 4 pack, these high tech AAs are more than twice the price of the Duracells. The performance: Averaging only 1051mAh across our suite of tests, these AAs are some of the shortest lasting rechargeable AA batteries we have ever tested. If you want a USB rechargeable AA, go with our high tech pick instead: Amptorret USB rechargeable AA Pros Can be charged with any micro USB cable. No need to keep track of a charger. Nice high voltage (1.5V) during the entire lifespan of the battery Built-in charging lights make it easy to know when the charge is complete Cons Does not perform a voltage step down to at the end of its life. This means that devices with a low battery indicator will simply shut off without a warning. Despite being a whole new type of battery, it has a very disappointing battery life. Where To Buy Amazon: Fuvaly USB rechargeable AA 1500mAh Deep Dive This is not a typical rechargeable AA. In fact, it is a small lithium-ion battery like you would find in your phone or laptop with some circuitry to mimic a regular AA all wrapped up in a AA costume. This has a few distinct advantages: For most casual users, remembering where a special battery charger is is a pain. This battery can be charged off of USB, just like your phone, headphones, or power bank would. Regular rechargeable AAs slowly decrease in voltage over time, causing the performance of your devices to fade. This may result in a remote control that needs to be a little closer to the TV, or flameless candle that isn't quite as bright, or a clock that runs a little slow. These special AAs though provide a constant voltage output over their whole life, allowing devices to operate just as well at the end of their battery life as they do at the start. Check it out: Notice how the USB rechargeable battery stays at 1.5V for its entire discharge, while the Duracell Rechargeable AA (a typical NiMH battery) falls below 1.3V less than a quarter of the way in. This higher voltage may help your devices run better. Technical Specs The following are the technical specifications of the Fuvally USB Rechargeable AA 1500mAh. Summary Capacity You can see how it stacks up against other rechargeable AA batteries here:

  • IKEA LADDA 2450 mAh AA Rechargeable AA Review

    The best value rechargeable AA available in 2021 What We Think At only $7 for a pack of 4, these Ikea's are a lot of battery for not a ladda money. They performed better overall than any rechargeable AA aside from the Duracells, yet they are some of the cheapest rechargeable AAs you can find - if you can find them that is. As they are IKEA branded batteries, they can be a little tough to find outside of the big box store. With a stellar price and performance, it is no wonder they scored well in our recent comparison test. Pros Excellent, long-lasting rechargeable AA Fantastic price Simple labeling Average capacity of 2371 mAh across all of our tests Cons Difficult availability outside of IKEA stores or website Price varies greatly in online retailers Where To Buy Ikea: Ikea LADDA 2450 Rechargeable AA Amazon: Ikea LADDA 2450 Rechargeable AA Technical Specs The following are the technical specifications of the Ikea Ladda Rechargeable AA. Summary Capacity You can see how it stacks up against other rechargeable AA batteries here:

  • AmpTorrent USB Rechargeable AA Review

    A whole new type of rechargeable AA What We Think The AmpTorrent USB Rechargeable AA is a whole new type of rechargeable AA battery. With a USB port for charging, it wins huge points for convenience. It charges faster (2 hours or less), is easier to use, and provides a steady, higher voltage for your devices. The only downside is the price. At $26 for a 4 pack, these high tech AAs are more than twice the price of the Duracells. Pros Can be charged with any micro USB cable. No need to keep track of a charger. Nice high voltage (1.5V) during the entire lifespan of the battery Built-in charging lights make it easy to know when the charge is complete Long-lasting Cons Does not perform the voltage step down to 1.1V at the end of its life like it claims. This means that devices with a low battery indicator will simply shut off without a warning. Despite being a whole new type of battery, it does not last longer than traditional rechargeable batteries Where To Buy Amazon: AmpTorrent USB rechargeable AA Deep Dive This is not a typical rechargeable AA. In fact, it is a small lithium-ion battery like you would find in your phone or laptop with some circuitry to mimic a regular AA all wrapped up in a AA costume. This has a few distinct advantages: For most casual users, remembering where a special battery charger is is a pain. This battery can be charged off of USB, just like your phone, headphones, or power bank would. Regular rechargeable AAs slowly decrease in voltage over time, causing the performance of your devices to fade. This may result in a remote control that needs to be a little closer to the TV, or flameless candle that isn't quite as bright, or a clock that runs a little slow. These special AAs though provide a constant voltage output over their whole life, allowing devices to operate just as well at the end of their battery life as they do at the start. Check it out: Notice how the USB rechargeable battery stays at 1.5V for its entire discharge, while the Duracell Rechargeable AA (a typical NiMH battery) falls below 1.3V less than a quarter of the way in. This higher voltage may help your devices run better. Technical Specs The following are the technical specifications of the AmpTorrent USB Rechargeable AA. Summary Capacity You can see how it stacks up against other rechargeable AA batteries here:

  • Duracell Rechargeable AA Review

    The best rechargeable AA available What We Think The Duracell Rechargeable AA is the best rechargeable AA we have ever tested. Featuring long-lasting power and an excellent price, it is no wonder that it won our recent comparison test. It managed an average mAh rating of 2470 across all 3 of our tests, which is only 30 mAh short of its advertised rating. Pros The longest-lasting rechargeable AA on the market Great price Comes from a trusted and well-known brand Great availability Cons None Where To Buy Amazon: Duracell Rechargeable AA Technical Specs The following are the technical specifications of the Duracell Rechargeable AA. Summary Capacity You can see how it stacks up against other rechargeable AA batteries here:

  • Best AA batteries of 2021

    We've dug deep and found the best AA batteries for you to use in any device. Best Rechargeables For almost all devices, rechargeable AAs are the way to go (see below for more details), and the Duracell Rechargeable AA is the best AA we have ever tested. With a great price and wide availability, it is hard to beat. Duracell Rechargeable AA At only $7 for a pack of 4, these Ikea's are a lot of battery for not a ladda money. They performed better overall than any rechargeable AA aside from the Duracells, yet they are some of the cheapest rechargeable AAs you can find - if you can find them that is. As they are IKEA branded batteries, they can be a little tough to find outside of the big box store. IKEA LADDA 2450 mAh AA Click here for our full rundown of rechargeable AA batteries Best High Tech This AA is a whole new type of battery. With a USB port for charging, it wins huge points for convenience. It charges faster (2 hours or less), is easier to use, and provides a steady, higher voltage for your devices. The only downside is the price. At $26 for a 4 pack, these high tech AAs are more than twice the price of the Duracells. AmpTorrent USB Rechargeable AA Click here for our full rundown of rechargeable AA batteries Best Disposables If you've got a few clocks, remote controllers, smoke detectors, or other low powered devices to power up, get the Energizer Ultimate Lithium. It is by far the longest-lasting AA we have ever tested. Energizer Ultimate Lithium If you need some batteries on hand, you can't go wrong with the Rayovac High Energy AAs for a great price and long-lasting power. Rayovac High Energy Click here for our full rundown of disposable AA batteries Disposable vs Rechargeable - which should I get? Short answer: Rechargeable For many devices, rechargeable AAs will last longer and provide better power than disposable batteries, and after a few uses they've usually saved you money. For that reason, we would recommend rechargeable AAs for almost all devices. However, the one area where disposable AAs can still really shine is in really low power devices, ones that last for months or even years on a single set of batteries. Devices like: Clocks Thermostats Smart Home Devices Smoke Detectors Alarms Remote Controls Tape Players Game Controllers (Xbox controllers) Mouse and Keyboards may be well suited for disposable AAs. It may also be nice to keep some disposable AAs on hand for power outages. In all other cases, you will be better off with rechargeable AAs. In many high-powered devices rechargeable AAs can last for 2x as long as disposable AAs. Don't believe us? Check out these 2 charts. How We Tested We subject every AA battery to multiple tests at 3 different levels. Read about our testing practices here.

  • Best Rechargeable AA Batteries of 2021

    After several thousand hours of testing, we've selected the best rechargeable AA batteries of 2021! Best Overall The Duracell Rechargeable AA is the longest-lasting rechargeable AA we've ever tested. With a great price and wide availability, it is hard to beat. Duracell Rechargeable AA A High Tech Alternative This AA is a whole new type of battery. With a USB port for charging, it wins huge points for convenience. It charges faster (2 hours or less), is easier to use, and provides a steady, higher voltage for your devices. The only downside is the price. At $26 for a 4 pack, these high tech AAs are more than twice the price of the Duracells. AmpTorrent USB Rechargeable AA Best Value At only $7 for a pack of 4, these Ikea's are a lot of battery for not a ladda money. They performed better overall than any rechargeable AA aside from the Duracells, yet they are some of the cheapest rechargeable AAs you can find - if you can find them that is. As they are IKEA branded batteries, they can be a little tough to find outside of the big box store. IKEA LADDA 2450 mAh AA Also Good While not quite as long-lasting, innovative, or cheap as our picks above, these rechargeable AAs all provide value for money. Buy whatever is cheapest at checkout and you won't be disappointed. AmazonBasics AA High-Capacity Ni-MH EBL AA Rechargeable Batteries 2800mAh Energizer Recharge Power Plus 2300mAh Skip These These batteries aren't worth your time or money Panasonic Eneloop Pro Panasonic Eneloop Fuvaly USB AA 1500mAh Sorbo USB AA Tenavolts AA Lithium Rechargeable How We Chose After extensive testing (see below) we were able to compile the following data: You can see that the price varied dramatically - ranging from $1.25 to over $8 per AA battery. The lithium-based USB rechargeable batteries are extremely convenient, but they suffer a major performance and price penalty. Amongst the traditional rechargeable AAs, the Duracell and the IKEA really stand out with a great combination of price and performance. Batteries like the Panasonic Eneloop Pro also stand out as high performers, but they carry a high price tag too. What's New In the last year or so lithium-ion based rechargeable AA's have become widely available. These batteries are totally different than traditional rechargeable AAs. They offer handy features like the ability to charge from USB and have LEDs to indicate when they are charged. Compared to standard rechargeable batteries, where voltage slowly declines as they drain, these new lithium-ion batteries provide your devices with a constant 1.5V from fully charged to totally dead. This allows your devices to operate at their best, but it does mean that devices with low battery indicators will be confused, and won't give you a warning before suddenly shutting off. If you're buying a lot of rechargeables then you probably want to skip these new batteries as the price will be prohibitive, but if you only need a few, the convenience of charging from USB outweighs the extra cost. How We Tested We tested all 16 candidates on professional battery testing equipment. These batteries were subject to 3 power levels to simulate the wide range of devices that AAs might find themselves in. We averaged the results from at least 2 different tests at each power level to come up with a realistic measurement. Then we averaged the results of all 3 power levels to come up with an overall average capacity. Since we were testing both traditional rechargeable AAs as well as new lithium-ion based devices, we decided to rank the capacity of all of our results by total Energy (mWh) delivered instead of the more typical unit of capacity (mAh). This is to level the playing field between the two different types of batteries, as the lithium-ion batteries operate at a higher voltage, which energy (mWh) takes into account. Depending on your device however, the difference in voltage may or may not be noticeable. See the relative performance of each battery below: AA Batteries ranked by overall performance: Average Capacity (mWh), Capacity (mWh), Endurance (hours), Average Capacity (mAh), and Capacity (mAh) Low Power Test Some devices require really low power for long periods of time. These devices may run for days, weeks, months, or even years on a single set of batteries. This test applies a really low power load (50 mA) to the AA batteries in order to simulate low power devices such as: Radios Clocks Thermostats Smart Home Devices Smoke Detectors Alarms Remote Controls Tape Players Game Controllers (Xbox controllers) Mouse and Keyboards Flameless candles This test is the least stressful for the batteries, and yet we really saw some differences between the batteries. The Eneloop Pro, Ikea Ladda, and Duracell were all effectively tied up top, while the Sorbo and Fuvaly USB earned such low scores they might as well have been AAAs. Rechargeable AA Batteries ranked by low power performance: Capacity (mWh), Endurance (hours), and Capacity (mAh) It is important to note that while this is the lowest power test we ran on these batteries, some of the devices listed above will draw significantly less power in operation. For instance, a flameless candle may only draw 25ma which would allow it to last about 100 hours or so, while a smoke detector may draw less than 1ma, allowing it to last for months or even years. Regardless of the actual power draw of the device, the relative performance of these batteries should remain the same. Medium Power Test A lot of our everyday devices demand more power from a AA battery than a flameless candle or smoke detector. These devices are probably ones that don't run all the time, but rather are turned on, used, and put away. Think things like: Handheld Games Professional Audio Wireless Transmitters and Receivers (Microphones, body packs, etc) Remote Control Toys (Cars, etc.) Portable Audio Recorders Walkie Talkies To simulate these devices, the tester was set to draw a continuous medium power (250 mA) load from the AA batteries. Somewhat surprisingly, this test actually narrows the gap between most of the cells and improved the performance of some. Rechargeable AA Batteries ranked by medium power performance: Capacity (mWh), Endurance (hours), and Capacity (mAh) What really stands out is how much better all of these batteries performed compared to disposable Alkaline Batteries in the same test. Almost all of the rechargeable batteries performed better than any of the traditional alkaline batteries. It seems the best thing to do for your devices, wallet, and the environment then is to invest in some rechargeable AAs and ditch the disposables. High Power Test Finally, we tested the batteries under a really high power load (1000 mA). This is a great way to simulate devices like: Cameras Camera Flashes Flashlights Electric Shavers Electric Adult Toys GPS units Breast Pumps These devices demand a lot from their batteries, but most of the rechargeables we tested were up to the challenge. Rechargeable AA Batteries ranked by high power performance: Capacity (mWh), Endurance (hours), and Capacity (mAh) While most of these batteries performed really well in this test (some even delivered more energy in this test than the medium power!), a few really fell flat. The EBL USB battery for example barely delivered a third of its claimed capacity despite having strong showings in both the low and medium power tests. Again, all of these rechargeable batteries performed far better than any disposable Alkaline Batteries in the same test. If your devices last for hours not days on batteries, skip the disposables. Detailed Battery Reviews See the following posts below for details about each battery: - coming soon Duracell Rechargeable AA Panasonic Eneloop Pro EBL 2800 mAh Ni-MH AA AmazonBasics AA High-Capacity Ni-MH 2400 mAh Panasonic Eneloop EBL USB Lithium AA 3300mWh TENAVOLTS AA Lithium Rechargeable SORBO USB BATTERY Energizer Rechargeable AA 2300 mAh Tenergy AA Rechargeable 2500mAh FUVALY Magnetic AA 2000mAh FUVALY USB AA 1500mAh AMPTORRENT USB Rechargeable Ikea ladda 2450 mAh AA Powerex Rechargeable AA NiMH 2600mAh Thunderbolt AA High Capacity NiMH Test Data See this file for all of the test data we collected - coming soon

  • Best Disposable AA Batteries of 2021

    After nearly 2,000 hours of AA battery testing, there is a clear winner for the best battery of 2021 as well as some clear losers. Best overall The best overall AA battery in our testing was the Energizer Ultimate Lithium - in fact, it wasn't even close. In the low power discharge tests (think: clocks, radios, smoke detectors, etc.) it lasted 20% longer than the next best AA. In the high power discharge tests (think: RC toys, electric shavers, cameras, flashlights, etc.) it lasted three and a half times longer than the next best. It is expensive (4 times the price of our best value pick) but it is truly unbeatable in long-lasting performance. For applications where long battery life or high power are important, the Energizer Ultimate Lithium is the clear choice. Energizer Ultimate Lithium Best Value The best value AA battery in our testing was the Rayovac High Energy AA. It performs as well as many batteries costing three times the price while outlasting all of the batteries in its price range by 10-30%. Rayovac High Energy AA Also Good The Energizer Max AA, Duracell CopperTop AA, and Anker AA all performed well. While not quite offering the value of the Rayovac or the all-out performance of the Energizer Ultimate Lithium, they performed well for their respective prices. Buy whatever is cheapest at the time of purchase and you won't be disappointed with any of these cells. Energizer Max AA Duracell CopperTop AA Anker AA Skip These These batteries aren't worth your time or money: Duracell Quantum AA Duracell Optimum AA AmazonBasics High Performance AA All Max Maximum Power AA ACDelco Super Alkaline How We Chose After extensive testing (see below) we were able to compile the following data: From this chart batteries like the Energizer Ultimate Lithium and the Rayovac High Energy really stand out as clear winners for their respective categories. How We Tested We tested all 10 AA Batteries on a professional 8 channel battery tester. We tested 3 examples of each battery at each power level. The results of those 3 examples were then averaged together to get an average performance for each battery. See the relative performance of each battery below. AA Batteries ranked by overall performance: Endurance (hours), Capacity (mAh), and Capacity (mWh) Low Power Test Some devices require really low power for long periods of time. These devices may run for days, weeks, months, or even years on a single set of batteries. This test applies a really low power load (50 mA) to the AA batteries in order to simulate low power devices such as: Radios Clocks Thermostats Smart Home Devices Smoke Detectors Alarms Remote Controls Tape Players Game Controllers (Xbox controllers) Mouse and Keyboards Flameless candles This test is the least stressful for the batteries, and as such the performance between them all was fairly close. The difference between the longest lasting Alkaline Battery (Energizer Max AA: 56 hours) and the shortest lasting Alkaline Battery (ACDelco Super Alkaline: 49 hours) was only about 7 hours or about 15%. Of course, the Energizer Ultimate Lithium still won this contest easily with an endurance of 67 hours. See more detailed results below. AA Batteries ranked by low power performance: Endurance (hours), Capacity (mAh), and Capacity (mWh) It is important to note that while this is the lowest power test we ran on these batteries, some of the devices listed above will draw significantly less power in operation. For instance, a flameless candle may only draw 25ma which would allow it to last about 100 hours or so, while a smoke detector may draw less than 1ma, allowing it to last for months or even years. Regardless of the actual power draw of the device, the relative performance of these batteries should remain the same. Medium Power Test A lot of our everyday devices demand more power from a AA battery than a flameless candle or smoke detector. These devices are probably ones that don't run all the time, but rather are turned on, used, and put away. Think things like: Handheld Games Professional Audio Wireless Transmitters and Receivers (Microphones, body packs, etc) Remote Control Toys (Cars, etc.) Portable Audio Recorders Walkie Talkies To simulate these devices, the tester was set to draw a continuous medium power (250 mA) load from the AA batteries. This test is fairly stressful for the batteries and as such, we see some big differences between the high performers and the batteries to avoid. AA Batteries ranked by medium power performance: Endurance (hours), Capacity (mAh), and Capacity (mWh) This test is where we really see the AmazonBasics High Performance AA Battery start to fall flat. Despite being in the same price range as batteries like the Rayovac High Energy or the Anker AAs, it lasts for a disappointingly short amount of time. Your devices can last for almost twice as long with our value pick, or nearly three times as long with our best overall pick. High Power Test Finally, we tested the batteries under a really high power load (1000 mA). This is a great way to simulate devices like: Cameras Camera Flashes Flashlights Electric Shavers Electric Adult Toys GPS units Breast Pumps These devices demand a lot from their batteries, and we really started to see some big differences in their performance. AA Batteries ranked by high power performance: Endurance (Minutes), Capacity (mAh), and Capacity (mWh) The only battery with good performance in this test is the Energizer Ultimate Lithium. All of the other batteries didn't fare too well, and you would be better served with a Rechargeable AA, which are better suited for the high power draws of these devices. Detailed Battery Reviews See the following posts below for details about each battery: Energizer Ultimate Lithium AA Rayovac High Energy AA Energizer Max AA Duracell CopperTop AA Anker AA Duracell Quantum AA Duracell Optimum AA AmazonBasics High Performance AA All Max Maximum Power AA ACDelco Super Alkaline AA Test Data See this file for all of the test data we collected.