Amazon.com: Synergy Digital Power Tool Battery, Compatible with Ryobi BPL-1820G Power Tool, (Li-ion, 18V, 9000mAh) Ultra High Capacity, Replacement for Ryobi BPL-1815 Battery : Health & Household
RB18L50 18V 6000mAh Lithium Battery Replacement for Ryobi 18V BPL-1815 BPL-1820G BPL1820 BPL18151 P102 P103 P104 Cordless Power Tools with LED Indicator - Walmart.com