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(More customer reviews)I just finished testing one set of those AmazonBasics AA NiMH Pre-Charged Rechargeable Batteries, using my old La Crosse BC-900 Charger/Analyzer. Here are my findings:
- Right out of the box, their average remaining charge is 1946mAh. The spread is very small, ranging from 1933 to 1959mAh. Note that the date code on those cells says 'MAR2011', so they probably left factory just two months ago. Still, those numbers are really impressive.
- After just one recharge/discharge cycle (done at 700/350mA), the average capacity improved to 2217mAh. That is about 11% higher than the rated capacity of '2000mAh'. Again the spread is small, varying from 2200 to 2250mAh. Those numbers remain unchanged in subsequent recharge/discharge cycles.
It is interesting to note that: performances of those AmazonBasics Pre-Charged AA cells are nearly identical to that of GP ReCyko AA cells, which I have tested last November. So I won't be surprised if those 'AmazonBasics' cells turn out to be rebranded GP ReCyko.
Just for comparison, the NEW Sanyo eneloop AA cells are also rated for 2000mAh typical, but the average capacity I measured is around 2130mAh, or 'only' 6% higher than rated. On the other hand, Sanyo claims the second-generation eneloop cells can be recharged up to 1500 cycles, whereas GP and AmazonBaisc NiMH batteries are rated for 'only' 1000 cycles. In real life, most people will probably never notice the difference.In summary, all three brands I mentioned above (Sanyo, GP and AmazonBasics) are excellent products. They all live up to the claim of "pre-charged and ready to use right out of the pack", and offer even higher capacities than rated. So just go by which brand is on sale, and you can't go wrong.
[Aside]
Most battery makers are touting their products as 'Advanced', 'Platinum', 'Ultra', and so on. Why oh why does Amazon simply call those superior batteries 'AmazonBasics'? If this is 'Basic', I can't wait to test the 'AmazonPrime' batteries!
[Aside#2]
Those AmazonBasics Pre-charged NiMH batteries are in black, which (to me) makes them look like disposable alkaline cells. On the other hand, the AmazonBasics Alkaline Batteries are in white, which makes them look like rechargeable cells. I really wish the color scheme were the other way around.
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BYD 8 Pack AAA NiMH Pre-Charged Rechargeable BatteriesProduct Features 8-pack 2,000 mAh rechargeable AA batteries for digital cameras, remotes, and more. Pre-charged and ready to use right out of the pack;Extremely slow self-discharge rate maintains 80% of capacity after 1 year of storage at 20℃. Greater Power and Better Performance in lower temp than Alkaline.Combines best features of AA alkaline (ready to use) and rechargeable (reusable) batteries Can be charged up to 1,000 times (including partially) without experiencing memory effect
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