Lithium-ion chemical composition resists drainage when idle Recharge on any 18-Volt ONE+ dual-chemistry charger (sold separately) Lightweight composition results in less user fatigue Battery recharges in as little as 60 minutes Hold Charge 4 times longer RYOBI 18V ONE+ System introduces the next generation in lithium-ion performance. LITHIUM+ batteries improve the performance of RYOBI 18V ONE+ power tools beyond simply extending the runtime. This high capacity LITHIUM+ battery improves the performance of RYOBI 18V ONE+ tools by increasing torque up to 35%. This battery provides up to 4X runtime, holds a charge 4X longer and is 20% lighter weight than Ni-Cd batteries. LITHIUM+ batteries have extreme weather performance to continue work in harsh conditions and an on-board fuel gauge to “Check Your Charge” before the work begins. LITHIUM+ batteries provide fade-free power for maximum performance throughout the charge. Best of all, like all 18V ONE+ batteries, LITHIUM+ batteries work with every RYOBI 18V tool ever made.