Custom Li-Ion Pack with Integrated Charger Circuit

megadiy

Newly Enlightened
Joined
Jun 16, 2005
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22
I'm looking to build some custom Li-Ion packs from some 18650's but I would like to be able to charge these from standard 12V automotive power. I know there are several charge controller IC's out there, but has anybody gone the extra step into putting them on a pcb and selling them? The 18650's will be setup as 3s, but it wouldn't be a problem to run taps to each battery to allow for single cell charging. I am mainly doing this as I would like to be able to charge the batteries in my light with an external plug rather than taking them out and charging them in a separate charger.
 
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