Does anyone know if the LiPoly Charger will charge the tiny 20mAh battery correctly? I ruined a battery charging with a different lipo charger. Its all puffed now.
That battery is in a very dangerous state now that it is puffed!! You should dispose of it properly. I wouldn’t keep it inside.
As for charging, there are small LiPo charging chips out there, you just need to find one you can vary the output current on. I’m not sure which “LiPoly Charger” you are referring to, but the lowest output charger SFE has is 20mA I believe.
Alternatively you could use an RC charger and charge it at 20mA.