Flylinktech 18V 4.0Ah lithium-Ion P108 Battery Replacement for Ryobi One Plus Cordless Tool BPL-1815, BPL-1820G, BPL1820, P102, P103 P104, P105, P106, P107 Battery replacement for Ryobi P107 18-Volt. 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.