Hi there, I have a smattering of random small LED lighting solutions from various countries, with either lead-acid batteries or NiMH batteries inside. They all seem to have some sort of charging circuitry (over voltage protection, etc.)
I'd like to measure the charging time of these LED lights (I have AC adapters). Can I just monitor the current going into the light from the AC adapter, or will this likely not reflect the battery state? I've read that I have to monitor the battery voltage instead?
Thanks