Makita BL1840B (196399-0) 18v 4.0Ah Lithium-Ion Battery Twin Pack The Makita BL1840B battery is lightweight and shock-absorbing. The Li-ion range delivers 430% more working capacity during it\'s lifetime compared to Ni-Cad and is 40% Lighter than Ni-MH. The Li-ion has minimal depletion of power during use or in storage over it\'s lifetime. The BL1840B includes battery capacity indicator LED\'s which show you how much power you have left at the touch of a button. MAKBL1840 TWIN PACK FEATURES Battery capacity indicator LED\'s show how much juice you have left on demand Foam cell technology Slide on battery - firm holding with multi contacts and shock absorbing pack, will not puncture and remains cool even in heavy use Unbeatable 36 minute charge time Same weight as 3.0Ah battery Works with your current Li-ion Chargers Longer run time and battery life All new 4Ah+ tools are compatible with 18V 3Ah and less Li-ion batteries MAKITA BL1840 SPECIFICATION Voltage: 18v Battery Type: Lithium-Ion Battery Capacity: 4.0Ah Weight: 1kg (approx) Charge Time (DC18SD): 90 mins Charge Time (DC18RA/DC18RC/DC18RD): 36 mins