The CH-94 is 120VAC charger for BP-82 & BP-84 14.4V Li-Ion Huskie Tool Batteries. During the 1 hour charge time, the CH-94 monitors battery temperature and battery voltage for correct charging. The design of the charger allows for stability while in motion by allowing the battery to be clipped in place. It also has completely re-designed contacts for a stronger engagement with the battery terminals.