charging a battery

The process could also be seen as analogous to cycling uphill or charging a battery for later use, as it produces potential energy.

EMA works like charging a battery with a positive pole, the cathode, and a negative pole, the anode.

The difference between the two voltages is because charging a battery requires a delta voltage (up to 13-14 volts for charging a 12 volt battery).

Simple charge controllers stop charging a battery when they exceed a set high voltage level, and re-enable charging when battery voltage drops back below that level.

Charging a battery too fast builds up internal pressure, so Rayovac gives each nickel metal-hydride I-C3 cell a switch that senses pressure and interrupts the charging current when necessary.