Do I have to buy a special charger?
No, We have designed our battery packs to be compatible with conventional chargers – including converters, inverter/chargers, alternators, and solar charge controllers. The correct charging algorithm is a bulk charge up to 14.4-14.6V, followed by an absorption charge for up to 2 hours. The battery does not need a float, but can be floated at 13.6 volts. These values are fairly standard for lead acid batteries and most chargers can be set to these values.