Amazon.com: Atcuji 6.5Ah RB18L50 Lithium 18V Battery Replacement for Ryobi 18V 5.0Ah Battery RB18L50, Compatible with 18 Volt ONE+ Cordless Power Tools 18V 5 Ah ONE+ High Capacity RB18L50 Battery : Tools
Makita BL1820B 18V Compact Lithium-Ion 2.0Ah Battery, Black - Amazon.com
ShineMate Cordless Orbital Polisher Kit with Brushless Motor 5 Inch 15 MM Throw, Portable Li-ion System Buffer Polisher 2000-5000 OPM With 2pcs 18V 5Ah Batteries - Amazon.com