Lithium Ion Custom Battery Packs 1S1P 18650 li-ion battery 3.7v 2200 mah Rechargeable Li-ion Battery Pack Good Discharge Rate for Drones Custom Lipo Batteries 1S1P 18650 li-ion battery 3.7v 2200 mah Rechargeable Li-ion Battery Pack Good Discharge Rate for Drones Custom Lipo Batteries $0.63-0.93