Great Investment!I was burning through alkaline batteries in a day on my headlamp. So I decided to pick up these rechargeables. I immediately charged all the batteries upon receiving them, thinking that I would need to replace them over a weekend of camping. I've now used my headlamp for an entire weekend of camping, and through several nights of working on my house, and my headlamp is still reading FULL BATTERY LIFE. I'm impressed. With regular alkaline batteries, I would have had to replace them one or even two times already. So not only is this less waste in a landfill, its more time between battery changes.Also - I used the charger in my Jeep USB port. No issues.The only negative feedback I would leave is that the plastic battery cases they send are a bit flimsy. One broke immediately upon opening. But they send two, and one set of batteries is typically in a charger or device, so this was of very minor consequence to me. The batteries and charger are the things I care about. In reality if I were to need a real battery case, I'd probably invest in a legitimate one and not use the freebie.
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