Originally Posted by
Aardwolf
Cheers, I've got a radio controlled mantle piece clock (inherited) that doesn't like rechargeables.
But it does run for about 1 year on 1 standard disposable AAA, sounds like one of those might work.
The ones I got have the recharger circuitry inside each battery. There is a port to plug a USB-C cable into the AAA or AA battery. I have also seen ones with a Micro-USB port instead of USB-C, so decide first which you think you want if you try them.
I was curious, so I checked. When I plugged the USB cord into the battery, the battery contacts had over 4 volts, so remove the battery and charge it when they are outside of the clock or other device so that you do not overload the circuitry.
I also saw ones that came with a charger box that you put the batteries into the box and plugged the cord into the box. I wanted small and portable for bike touring, I wanted to avoid a large charger box, so I got the batteries that directly plug into the cord.
My clocks seem to be happy with NiMH batteries.