Ryobi P108 18-Volt One Plus Lithium Plus High Capacity Battery. This compact battery provides 4x more runtime, 4x longer lasting charge and 20- lighter weight than Ni-Cd batteries. The fuel gauge lets you know the battery status before work begins. Lithium-ion batteries provide fade-free power for maximum performance throughout the charge. Best of all, it works with Over 50 great One Plus tools.
4x Runtime Compared to 18-Volt Ni-Cd (P100)
Improves the performance of 18-Volt ONE+ tools up to 35-percent
On-board fuel gauge to check your charge before work begins
20-Percent lighter weight
Holds charge 4x longer