Review on ⚡️ Durable Duracell Ion Speed 1000 Battery Charger with 4 AA Batteries - Efficient Charging for AA and AAA Batteries by Dustin Miller

Good batteries that definitely offer rated capacity even with heavy use. I use it in a very bright headlamp to check livestock around my farm at night. I usually burn the whole set of batteries every night. However, they do keep my light bright for the duration of the discharge. They are rated at 800mAh but when I checked their actual capacity on my hobby charger they actually have a capacity of around 1000mAh or more. Note that as NIMH rechargeable batteries, they easily self-discharge if left unused after charging. When I tested their self-discharge, I noticed a capacity loss of 12-15% 24 hours after charging and about 20-25% 1 week after charging. Important!: You can only charge 2 batteries or 4 batteries at the same time. including charger. You can't charge just one or just three.