This Shido 12V 4.0A battery charger features a unique, optimized algorithm for safe charging of your LiFePO4 lithium and lead-acid batteries.

To charge your battery optimally, we recommend starting with a very low voltage and current, as applying high values from the start of charging will lead to premature failure.
Similarly, using chargers with voltages in excess of 15 volts for any length of time will seriously damage your lithium battery.

The Shido dual charger also ensures that your batteries maintain their charge once charging is complete, by checking the voltage every four hours.
When the battery voltage drops below 12.8 volts, the charger starts charging again.