Never used these, but the USB-rechargeables have been around for a while and never really took off. If you have need of a particular size, you'd almost be better off getting plain old NIMH batteries and a plug-in charger.
If you're looking for batteries to use in a pinch, remember that rechargeables will slowly discharge over time, leaving you with a dead (and possibly inoperable battery) but plain old Alkaline cells can sit on a shelf for 5 years without issue.
Never used these, but the USB-rechargeables have been around for a while and never really took off. If you have need of a particular size, you'd almost be better off getting plain old NIMH batteries and a plug-in charger.
If you're looking for batteries to use in a pinch, remember that rechargeables will slowly discharge over time, leaving you with a dead (and possibly inoperable battery) but plain old Alkaline cells can sit on a shelf for 5 years without issue.
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