Hey Guest!
Hey - did you know if you click on the title of a thread it will take you to the first unread post since you last visited that thread?
but were afraid to ask: 
STOP!! Never post your email address in open forums. Bots can "harvest" your email! If you must share your email use a Private Message or use the 
smilie in place of the real @
Pretty Please - add it to our Events forum(s) and add to the calendar! >> 
Charging Ni-Mh batteries properly needs more sophisticated electronics than just running voltage across the batteries. Somewhere there needs the be a controller. Either the controller is in the wall wart or the vacuum. Either way what you are measuring and what you get may be two different things.
One other note about Ni-MH batteries they are supposed to be charge alone not in series. The batteries for my RC plane have two plugs. One wired in series for the output and one with wiring to each battery for charging. Internally that may be how your vacuum is wired.
One other note about Ni-MH batteries they are supposed to be charge alone not in series. The batteries for my RC plane have two plugs. One wired in series for the output and one with wiring to each battery for charging. Internally that may be how your vacuum is wired.
