Where uninterrupted run time is critical, such as on remote construction locations or where charging capacity is distant and would mean valuable time lost away from the operating point, extended run time is all important. The Makita BL1850B 5.0Ah 18v Li-ion battery provides 66% more run time than that of the 3.0Ah battery whilst maintaining the same size and weight so maintaining the excellent balance and comfort of a Makita tool in use. Makita BL1850B 18v 5Ah Li-ion battery is compatible with 18v tools if they have a star on the connector plate or has a yellow connector plate Recharge time for the BL1850B 5.0Ah battery is just 45 minutes when using a Makita DC18RC or DC18RA fast charger. This compares with 22 minutes for the popular 3.0Ah 18v Makita Li-ion battery or 36 minutes for the 4.0Ah Li-ion battery. The battery capacity indicator LED's which show you how much power you have left at the touch of a button. This BL1850B 5.0Ah battery is compatible with all Makita 18v Li-ion tools that have a star symbol on the connector plate, or a yellow connector plate with a star on, or have a yellow connector plate only.