Amazon Basics Rechargeable AA Batteries, 4-Pack, 2400 mAh, NiMH High-Capacity Batteries, Recharge up to 400x Times, Pre-Charged

As a professional reviewer, I've had the opportunity to put the Amazon Basics 16-Pack Rechargeable AA NiMH High-Capacity Batteries (2400 mAh) through their paces. My findings are based on rigorous testing and comparison with other brands in the market.Upon unboxing, my initial impression was that these batteries are strikingly similar to the Sanyo eneloop XX batteries, both in appearance and specifications. This led me to believe that they might be rebranded versions of the same. To confirm my suspicion, I embarked on a series of tests using my La Crosse BC1000 Battery Charger/Analyzer.Here's what I found:Pros:+ High Capacity: The batteries delivered an average capacity of 2555mAh after a few recharge/discharge cycles, exceeding the rated 2400mAh. This is a testament to their high-quality performance.+ Quality Control: The tight spread between 2510 and 2610mAh across the batteries indicates excellent quality control.+ Value for Money: At the time of writing, an 8-pack of Amazon High-Capacity AA batteries costs less than a 4-pack of eneloop XX batteries, making them a great bargain.+ Long-Term Performance: After 5 months in storage, the batteries retained 85% of their original capacity, outperforming the Sanyo XX batteries in my previous tests.Cons:- Size: These batteries are slightly fatter than typical AA batteries, which might cause fitting issues in devices with extremely tight battery compartments.- Lifespan: While they perform excellently in the short term, these batteries seem to lose their ability to hold charge after a few years. If you're a heavy user, be prepared to replace them after 2-3 years.- Country of Origin: Some users have reported a drop in quality in batteries made in China compared to those made in Japan.In conclusion, the Amazon Basics 16-Pack Rechargeable AA NiMH High-Capacity Batteries (2400 mAh) offer excellent performance and value for money. However, their slightly larger size and shorter lifespan compared to other brands might be a deal-breaker for some users.Remember, the best battery for you depends on your specific needs and the devices you intend to use them in. Always consider these factors when making your purchase decision.

I recently purchased EBL's 2500 AA NiMH batteries (ASIN B08XP7ZC8K) because they were less expensive, advertised 2500mAh capacity, and were 30% less expensive (as of May 2024), and I liked the colors. Since it seemed a little too good to be true, I decided to thoroughly test and compare the brands. The data is worth sharing.Testing Methodology: All tests were performed with an ISDT N16 charger. It is an intelligent charger. Two rounds of testing were performed at three charge rates: 0.5A, 1.0A, 1.5A. The NiMH charging strategy starts with a lower voltage and increases the voltage over time and considers temperature as it charges, up to the set charge rate. "Activation Charge" for NiMH cells was enabled, which drains the battery first, then performs a full charge. This should result in a consistent charge pattern (no partial charges) and level the playing field as discharging was uniform. The charted results omit the single worst charge, while the table includes all results. The batteries have not been used in anything other than the ISDT N16 charger.Results:* All cells charged to roughly 2574mAh on average, at all charge rates* The product exceeds advertised 2400mAh capacity by 174mAh, on average, at all charge rates.* At a 1.5A charge rate, the charge variation between the least & most charged cells was the greatest* At a 0.5A charge rate, the variation was the lowestComparing this to EBL's offering, Amazon's 2400mAh battery had a tendency to exceed the stated design capacity, which I've observed as between 2562-2580mAh on average and as high as 2848mAh. This, from the same charger, at the same charge rates, and with the "activation" option enabled.Cost comparison (as of May 2024) highlights some interesting data:* AZ 2400 12-pk @ $21.79 - $1.82/cell - @2574mAh realized capacity = 0.07 cents per 100mAh* EBL 2500 12-pk - $15.28 - $1.27/cell - @2100mAh realized capacity = 0.06 cents per 100mAh* Capacity as deciding factor: Amazon "wins" as they hold 18% more charge, but initial purchase cost is 30% more than EBL. When considering cost per cell's capacity, the difference is negligible and both brands stand on equal footing. Amazon's brand charges more consistently, holds more charge/out-performs their stated specification, and has more consistent voltage at rest.* Cost as deciding factor: EBL "wins" on price as the initial purchase cost is less expensive than Amazon by 30%. However, EBL's cells hold 18% less charge than Amazon and fall short of charging to EBL's stated capacity by 16%. If EBL's cells charged more consistently and could be fully charged to capacity, they would easily represent the better overall value.* Charging: EBLs perform better at a higher 1.5A charge rate and also charge more quickly. Amazon's batteries perform better at a 0.5A charge rate which takes longer. However, Amazon's variability at 1.5A charging (360mAh variance) is only *slightly* worse than the best EBL 1.5A result (324mAh variance). EBL's variance at 0.5A charge rate is 644mAh, which is 2.25x worse than Amazon at 287mAh variance. Amazon's product performance is consistently consistent.

Review for AA size NiMH rechargeable cells.These are size AA Nickel Metal Hydride Batteries - actually cells, but I am nit-picking now. The cells arrived in good condition considering they were sold as used. They had a manufacture date of February 2024 and since it it now November they definitely needed a top-off charge. A smart charger is strongly recommended, save yourself a headache and don't use a cheapo charger. I use an EBL model EBL-907 smart charger which charges and monitors each cell individually.The charger showed a level of one bar for each cell at the beginning. The batteries, um cells took 2.5 hours to reach full charge and then showed a voltage of 1.45 volts, which is the same as other brands. To conclude, these are just as good as other brands and are a bargain too.

Batteries work well and lasts long. Does not come fully charged so charge before use.

These batteries are a great price and value. I use them in the game controller and mouse for the computer instead of constantly using up disposable batteries as that gets expensive. These are long lasting and they fit fine in the energizer brand charger I have. It’s a great idea to save money and the environment by getting recharging batteries.