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How can I tell if my battery bank has a shorted cell?

Typically, a shorted cell will drop the bank total voltage by 2V. This will cause the battery voltage to reach LBCO that much sooner, and it will cause 
the charge voltage to jump up very quickly. It will also cause the batteries that are left in the bank to operate at an equalization level (remember the 
bank has effectively been reduced by 2V, so normal charge voltages will be too high). The fastest way to tell if a battery has a shorted cell is to measure
 the DC voltage across each battery. If it measures 2V less than the other batteries, it has a shorted cell. 
For example, a 12V battery will read 10V (when the rest of the batteries read 12V). 
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