May 24, 2022 · Pros Best life duration (2100 cycles, 6 years) Works at low temperature (-4°F) Great capacity (2000mAh, 8 hours) Storage life of 10 years Cons A bit pricey Energizer Rechargeable AA Batteries, NIMH, 2000 mAh,1.2V One of our best picks for a rechargeable solar light battery.