SLA Battery Charging?
I am charging them to 14.75 volts each, or would like to, they say they should be charged to 14.5 to 15v right on the front of them. While charging they both climb, but one climbs faster and stops once the voltmeter reads 15.2v across it. 0.2v over the rated value really doesn't seem to be of major concern, I just find it odd the different voltmeter readings across the batteries are different while the charger is connected and identical when its not. Does it have something to do with charging them in series? I did read that you really can't measure batteries while charging, you have to disconnect the charger first, but any insight would be appreciated.