Li-ion battery fitted with a 4-stage LED charge indicator, providing an indication of remaining charge without needing to be connected to a machine. Allows digital communication between battery and charger. Heavy duty shock-absorbing casing with firm-holding slide-on connection. Equipped with a protection circuit preventing over-discharge, high temperatures and overload of circuit. Can be part-charged with no loss of power through memory effect. Compatible with Makita 18V LXT units with a star imprinted on the base of the machine, or a yellow base plate.