I've been using these in my mouse and in my headlamp for 3ish weeks, and ya know what? I still leave my mouse turned on overnight by accident sometimes - which is a different product's design issue and I'll thank you for leaving the wiring design of my brain out of this ;-). What's different: I haven't once had a concern that I'll need to immediately drop everything and get batteries at the brick-and-mortar up the street just so I can get to my workday. When I *do* turn my mouse off between uses, they probably last a whole week before I go to charge 'em, and they're still above a 20% charge. Planning to buy more AAAs and some AAs now, for all the other electronic tchotchkes. As a bonus: no lithium mining involved!

I have been using eneloop batteries for years and this up dated charger is a major upgrade for me. 1.It charges faster. 2.It tells you the condition of the batteries. 3.It was a fair price. 4.Love the Led display.

Nice little charger. Charges both AA and AAA. The AAA go in at a little of a strange angle, but once you figure that out, you are good to go. Batteries charge fast. Comes with 4 batteries per-charged. Great value

I'm very satisfied with these rechargeable batteries. Easy to charge and shuts off automatically when fully charged. They work well with my flashlight.

Great quality batteries! Works great for all devices