Macworld At a glance Expert's Rating Pros ・Power bank in a protective phone case ・Robust two-part design ・Magnetic back Cons ...

Let's look at the sad case of UltraFire ... with the strange exception of the Fujitsu Universal Power AA. This battery has very low capacity at lower drains but actually performs pretty well ...

With an estimated 10-year lifespan using two extended-use lithium AA batteries, the Elevation Lab TimeCapsule 10-Year Battery Case may be an inexpensive answer for certain use cases where you want ...

These rechargeable batteries use NIMH battery chemistry. The AA battery stores up to 2,000mAh and the AAA battery up to 850mAh of power. Eneloop batteries are precharged and are ready to use out ...