recharging
after the rest period , the battery is placed on a constant current charge at its five hour rate , for seven hours . this will put 140% of its rated ampere-hour capacity into the battery .
in the last five minute of charge , the voltage of each individual cell is measured . any cell not having a voltage somewhere between 1.55 and 1.80 volts at a temperature between 70 abd 80 degree F is considered faulty and must be replaced.