Nitrowing wrote:Is this because a car charger outputs too much amps?
Sticking around for a couple of hours watching a battery, not knowing what to look for??! Ummm....
vic7767 wrote:As Mike has mentioned, a fully charged Roomba battery that is working will display about 17 volts dc when checked with a meter. The stock Roomba power supply has 22 volts dc that is output to the charging jack.
You can hook up the power supply directly to the battery but you will need to monitor the battery both for voltage and temperature. That monitoring is normally done by the Roomba charging software. If you bypass the Roomba charging system then things become more complicated and dangerous.
It is necessary to include the PSU's amperage (current) as part of such "wondering".Nudnik wrote:I wonder if a laptop power adapter would work. For example my HP adapter has 19 volt output,...
Mike, Nitrowing's charging setup will not permit monitoring (unless he interrupts charging periodically to measure terminal voltage w/o the PSU connected, then plots those V vs t data) for that voltage peak. His only hope is to fully depend on using the battery's thermistor resistance to estimate cells' temperature.mfortuna wrote:While monitoring the pack look for the voltage to peak and then drop. Also the pack will get warm when fully charged.
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