Apologies this has probably been asked before - I have been looking but I think I don't know the terminology to answer my question.
I have a micro-controller based project and I want to power it with three LiPo 2000 mAh cells in parallel. I think I understand how to do that part the issue is with charging the batteries - which I know how to do separately but the design is such that the batteries cannot be removed.
Ideally, I want the batteries to charge quickish (couple hours). I thought about using USB but 500mA would be a slow charge. I would like to use a standard UK wall plug which I think is 12v which would be too powerful for the components in my projects (4.7V).
So I need to kind of turn the current off (is this called a circuit breaker?) just when the batteries are charging but want this to work automatically and then when they are charged I can remove the charger and turn the project on manually with a push button.
Another thing is I need to keep the charging components really small too like under 20 mm width and 60 mm length. I would like the wall plus to be mini USB ideally.
Also if the battery charging is kinda on a separate circuit (or part of the circuit is turned off - including the micro-controller) could I use AC rather than AC-DC
I hope that makes sense. Any help is hugely appreciated