Amazon Basics Rechargeable AA Batteries, 12-Count, 2000 mAh, NiMH, Recharge up to 1000x Times, Pre-Charged

These Amazon AAs are great. The last batch has lasted over five years now and the biggest issue I've had with these rechargeable AAs is making sure the other members of my household don't throw them away when replacing dead batteries. The batteries test a bit higher capacity than advertised. Yes there is some voltage drop when in storage but that's the exact same issue with all 1.2V NiMH chemistry batteries, these are very good batteries. To fix that issue I charge mine just before use and never have any problem. These last well and if recharged properly (slowly around 200 Mah), you can use these/cycle them for years. If you use a fast charger often or heat these up when charging, the cycle life will be greatly reduced.

A while ago, I completely switched from leak-prone alkaline batteries to Ni-MH rechargeable ones. I’ve tested several brands, and while Amazon Basics rechargeable batteries aren’t my top choice, they’re definitely worth considering for lower-power devices like remote controls, thermometers, and similar electronics.In my testing, these batteries actually exceeded their stated capacity, which is impressive—especially at this price point. Like most Ni-MH batteries, they have a slightly larger diameter (9.3 mm compared to 8.9 mm for standard alkaline batteries). That said, I had no issues fitting them into most of the devices I tried. The only exception was my Moen motion-activated faucet, where the fit was very tight.It remains to be seen how long they’ll last over time, but so far, I’m happy with their performance and would definitely recommend them for everyday use.

I thought I was gonna hate these. One I ordered way too many. And I figured they were gonna die quickly. I’m proud to say that they are powering all my solar lights and my neighbors. I even now use them in my baby flashlight. The big thing is is to charge them up before setting them outside. Most solar panels are too wimpy to ever catch up.

Charge is good, but they are wider than the standard AA battery. So they don't fit some items and fit is tight in orders.

Initial Impressions:The batteries arrived nicely packaged in a cardboard box, with six, individually wrapped packages of four cells each. My testing process for new cells is pretty extensive and these Amazon Basic’s pre-charged cells, at least on the initial round of testing prove to be of very good quality.All 24 cells were weighed for consistency. All of the cells measured in at 27 grams, plus or minus 0.03 grams indicating that the manufacturing quality for the active material is highly consistent.The 24 cells then were put through an initial capacity discharge test utilizing an ISDT 24 channel charger. 20 of the 24 cells showed an initial capacity ranging from 1890 to 1920 mAH, and four cells showed an initial capacity of between 1310 and 1400 mAH. The cells are rated by Amazon as 2000 mAH cells, so the 20 cells came pre-charged at 95% full. I assume that the four outliers were not charged fully at the factory.All 24 cells were once again placed in the ISDT charger, this time, set for activation charge, where the cells are charged and discharged three times in succession to distribute the electrolyte equally within the cell, and fully charge the cell to its maximum capacity. All 24 cells charged to beyond the Amazon rated capacity with the average capacity at 2130 mAH.The fourth round of testing involved a torture test utilizing a West Mountain Radio Computerized Battery Analyzer. Each battery underwent a mission profile test, at constant current, until the output voltage dropped to cutoff. Again, each battery, under constant load, exhibited a measured capacity of between 1920 and 1975 mAH.The fifth round of testing was a random selection of four cells to be put back on the CBA and a discharge test ran, again at constant current, plotting the results of all four cells on the same graph. All four cells had a discharge profile that is extremely consistent, and flat across the entire time until the cell was exhausted.The sixth round involves a self-discharge test, again four random cells were selected and were measured for their open-circuit voltage. After 48 hours, these same cells were measured again, and their open-circuit voltage compared. The self-discharge was again, very consistent, and was on average 0.03V from the initial measurement. While 48 hours is a very short period to test for self-discharge over time, it’s encouraging to see that there was little in the way of voltage loss. I set two random cells aside, that will be measured at 30, 60, 90, and 180 days to see if this low discharge is maintained over an extended period of time.At this point, after the testing performed, I would rate these cells as excellent quality, and an excellent price point. Most of my cells are Eneloop, and I was curious to see how the Amazon cells would perform compared to the Eneloop and the Ikea Ladda cells, which are the same.I’ve been using rechargeable cells since the NiCd days, as there is something inherently wrong with the idea of buying something only to toss it in the trash a few days or weeks later. Add to that all Alkaline batteries will eventually leak and destroy what they are installed in, I am happy to see that there is a lower cost, quality cell available. Only time will tell if they are truly an equal to the Eneloop brand of battery, most of mine are still going strong after almost 15 years of pretty demanding service.

The batteries came fully charged and recharged flawlessly. This is my second set purchased, and I already have the AA as well as AAA. I have two chargers and can easily rotate as needed, and recharge easily for my next use. Well satisfied.