Battery Type: Li-ion, Voltage:18V, Capacity: 4000mAh; Compatible with all Ryobi 18-Volt ONE+ tools except P208 P261.
It works with over 50 great ONE+ tools(Ryobi P216 Tools are Excluded).20% lighter weight reduces user fatigue.
The Ryobi 18-Volt ONE+ High Capacity LITHIUM+ battery provides four times more run time, 4 times longer lasting charge and 20% lighter weight than Ni-Cd batteries.
Highest quality standards,Integrated microchip prevents overcharging & lengthens battery life.
The fuel gauge lets you know the battery status before work begins.