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Measured capacity, not the number on the pack. Reviewed found some cells hold hundreds of mAh less than claimed.
Charge cycles. A cell rated for 1,000 cycles replaces far more disposables than one rated for 400.
Pre-charged, low self-discharge NiMH. Ordinary NiMH can lose up to half its charge in a year in a drawer.
Rechargeable AA batteries
Energizer Recharge Universal AA
Reviewed's best overall: rated 2,000 mAh but measured about 2,200 to 2,300, and rated for up to 1,000 charges. Comes pre-charged.
4 AA
Buy on AmazonCharge them in any NiMH charger. Never put NiMH cells in a charger made for another chemistry.
What we ruled out
Rechargeables rated for only a few hundred cycles. Reviewed found it hard to recommend Duracell's AAs because they are rated for only 400 cycles.
Lithium AAs that need their own charger. Some 1.5 V lithium rechargeables charge only in the maker's own charger, so you can't reuse a standard NiMH charger.
Also good
EBL 2,800 mAh AA. The highest measured capacity in Reviewed's test, about 2,600 mAh, but costly per cell.
Sources
- The best rechargeable batteries, Reviewed (2024)