Makita BL1840B (1967265-4) 18 Volt 4.0Ah Lithium-Ion Battery The Makita BL1840B is a lightweight and shock-absorbing 4.0 Ah Battery. It has a charge level indicator with four bars to show how much power is left. The Li-ion range delivers 430% more working capacity during its 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 its lifetime. Features: Charge level indicator 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 and size as 3.0Ah battery Works with your current Li-ion Chargers Longer run time and battery life PLEASE NOTE - when new, these batteries require about 6 to 8 full charges to reach their optimum performance Specification: Battery Ah: 4.0 Ah Battery Type: Li-ion Voltage: 18 v Weight: 0.6kg