Bad Boy Mower Battery
Bad Boy builds its zero turns in Batesville, Arkansas: heavy steel frames and big V-twins that want a battery with real cranking power. A Bad Boy mower battery in lithium brings it, with far more cranking amps than a lead-acid U1 at a fraction of the weight, and a charge that is still there after the mower sits all winter.

Bad Boy Lawn Mower Battery
StarterAntigravity Group U1 12V Lawn Mower Battery 925CA (w/ Re-Start, Left Positive)
StarterAntigravity Group U1R 12V Lawn Mower Battery 925CA (w/ Re-Start, Right Positive)
Dual PurposeDakota Lithium 12V Lawn Mower Battery 25Ah DL+ (300CCA Dual Purpose)
StarterGroup U1Ionic Lithium Group U1 12V Lawn Mower Battery 720CA (S8, Bluetooth)
StarterGroup U1Ionic Lithium Group U1 12V Lawn Mower Battery 1220CA (S8, Bluetooth)
Bad Boy Mower Battery Size
The replacements sold for Bad Boy’s gas zero turns are Group U1: a 12-volt case about 7.7 x 5.2 x 7.2 inches. Read the label on your old battery for the group size and the terminal side (a U1 has the positive on the left, a U1R on the right, facing the posts), and pick the matching battery below. The Ionic S8 has posts at all four corners, so it suits either layout.
This page is for the starting battery in a gas mower. Bad Boy’s 80-volt electric zero turns run a battery pack of their own, which we do not carry. Not sure which yours takes? Call 888-274-7544 with the model number.
Bad Boy Mower Battery FAQ
What size battery does a Bad Boy zero turn take?+-
Bad Boy gas zero turns take a 12-volt battery in the Group U1 size, about 7.7 x 5.2 x 7.2 inches. Check the label on your old battery for U1 or U1R, which tells you the terminal side.
Why does my Bad Boy mower battery keep dying?+-
Usually because it sits. A lead-acid battery loses charge every week the mower is parked, and one left flat over a winter sulfates and never recovers. Lithium loses only a few percent a month, so a mower that sits between cuts starts when you turn the key.
Do you carry batteries for Bad Boy electric mowers?+-
No. Bad Boy’s 80-volt electric zero turns run a battery pack of their own. The batteries on this page are 12-volt starting batteries for gas mowers.