Lightweight and shock absorbing, the li ion battery range delivers 430% more working capacity during it's lifetime compared to ni cad and is 40% lighter than ni mh. A makita li ion battery has minimal depletion of power during use or in storage over it's lifetime. This battery dual pack includes two makita bl1850b 18v 5.0ah batteries with led indicators and is compatible with all tools from the 18v lxt cordless range. Specifications bull voltage 18v bull capacity 5.0 ah bull battery type li ion bull battery id bl1850b features and benefits bull unbeatable 45 minute charge time bull led charge indicator on battery bull same weight as 3.0ah battery bull works with your current li ion chargers bull longer run time and battery life contents bull two bl1850b 5.0ah batteries