Hi-Buff HB-699-BAT - 12v LI-On Lithium Battery (Qty. 1) 

MFG Part Number HB-MM-01-BAT

A genuine replacement for the Mighty Mini 3 inch Cordless Polisher, the Mighty Mini Polisher Battery is a 12 volt Lithium Ion battery. While the Mighty Mini 3 inch Cordless Polisher comes with 2 batteries already, you never know when you’ll need to polish for just a little bit longer! Make sure you have plenty of polishing time with a genuine replacement piece – the Mighty Mini Polisher Battery!