Batteries in Series
Most recent answer: 09/14/2014
- Bruce Liron (age 54)
Philippines
One part of your question is fairly easy. A fully charged battery typically has a bit higher voltage than the rating, with the difference depending on the battery type.
As for the voltage not equaling the sum of the voltages, that's very peculiar. One possibility is that there's a problem with your meter, that it has a much lower impedance than it should. Then it will draw significant current. The voltage on a battery drops as it supplies current, rather sharply if the current exceeds the limits of what the battery can supply. Of course the meter will draw more current at higher voltage, so that will have a bigger effect on the voltage of the batteries. Still, the effect you're seeing sounds suspiciously large.
You might try another meter. You could also check to make sure that somehow the meter probes aren't touching somthing else which could carry current.
Mike W.
It sounds to me like one of the batteries was turned around backwards 4*1.35 = 5.4
LeeH
(published on 09/14/2014)