Battery Pack for E60 & E75
The Optional internal Lithium Ion battery pack charges when the unit is powered. When power is cut to the unit, it automatically draws power from the battery. Ambient temperature and use (how often you open the lid or what is in the cooler) can affect the battery life as those factors directly determine how often the compressor has to run. Our testing as well as customer feedback have shown battery life anywhere from 12 to 24 hours in average ambient temps.
The battery drops in to a slot on the E60 or E75 units without any tools or connectors. Note that the E75 is a different unit than the TW75 which does not have the battery slot.