20-10-2023, 04:57 PM
(This post was last modified: 20-10-2023, 05:05 PM by Murphyv310.)
(20-10-2023, 04:42 PM)ppppenguin Wrote: At 3.6V nominal per cell isn't 7.2V a bit low for replacing a 9V battery?
They charge to 4.2v and take a good few hours to drop to 3.7v. I run one here and have no problems until the batteries get to just above 6v.
Or three in one box and two in the other, that though would give 21v fully charged which is slightly too high as new PP9s will give 20v, a diode in series is a way out of course giving 20.4 fully charged, the USB chargers though will give the batteries 4.1v each = 20.5v again a diode brings this to 19.9v.
Personally I'd still stick to 4 batteries.
