https://www.homedepot.com/p/RYOBI-O...MANCE-Battery-and-Charger-PSBCS01K1/320511072 RYOBI ONE+ HP 18V Brushless Cordless Compact 6-1/2" Circular Saw Kit w/ 4.0 Ah HIGH PERFORMANCE Battery & Charger (PSBCS01K1) on sale for $81. Shipping is free or select ship to store pickup where available.