Flylinktech P108 18V 4.0Ah Lithium Rechargeable Battery for Ryobi P122 P108 P104 P105 P102 P103 P107 Ryobi P107 18-Volt battery replacement 18V 4.0Ah Lithium Battery for Ryobi P104 P105 P102 P103 P107 P108 18v LITHIUM-ION battery delivers long life and run time with fade-free power. Fuel gauge onboard: Displays remaining runtime for less downtime on the job. Highest quality standards,Integrated microchip prevents overcharging & lengthens battery life. Built in high quality battery cells,No effect on the battery,Charging at any time.