First of all they are AA and AAA batteries and as expected they power things. For the past few weeks I've been using AA in a mouse and a presentation/laser pointer mouse (the batteries drain quickly) that I use when I travel for work. So far there are no problems. I haven't used AAA but expect them to work well. AAA charges quickly, just under 2 hours. The AA batteries took over 5 which seems a little slow but not by much. The charger itself is a handy size to put in your pocket. The only reason I didn't give 5 stars is that it uses micro USB for charging. It's 2020 now, that's unacceptable. I also bought an 8 battery charger and batteries from the same manufacturer for home use.
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