Antigravity ATZ-10-HD 12V Cub Cadet XT1, XT2 & Ultima Battery 525CA (w/ Re-Start)
Antigravity ATZ-10-HD 12V Battery for the Cub Cadet XT1, XT2 and Ultima: 50% More Battery on the 725P17335 Footprint
Cub Cadet's current XT1 and XT2 Enduro tractors and Ultima ZT1 and ZT2 zero turns do not take the full-size Group U1 found in most riding mowers. They start on part 725P17335, a compact 12V AGM rated 210 cold cranking amps and about 11Ah, the same size as a YTZ14S powersports battery. The ATZ-10-HD RE-START is Antigravity's heavy duty battery on that footprint: 525 cranking amps and a 9Ah lithium pack, 50% more than the standard ATZ-10, in a 3.15 lb case.
It is a RE-START battery too. Before a winter in the shed or a slow drain can run it flat, the BMS puts it to sleep with a starting reserve held back. Press the button on top, turn the key, mow.
Why the ATZ-10-HD
- 525 cranking amps and 9Ah (18Ah lead-acid equivalent), the biggest pack Antigravity fits in this case
- Same length and width as the 725P17335, so it sits in the stock tray
- RE-START reserve and push-button jump start
- 3.15 lbs
- 4-terminal design fits either cable layout, positive left or right
- Full BMS with cell balancing
Antigravity Heavy Duty RE-START Battery Video Review
ATZ-10-HD RE-START Specs for Nerds
| Spec | ATZ-10-HD RE-START |
|---|---|
| Voltage | 12V LiFePO4 |
| Cranking Amps | 525 CA (Antigravity publishes CA, not CCA) |
| Capacity | 18Ah lead-acid equivalent (9Ah lithium) |
| Energy | 115Wh |
| Cub Cadet Fit | The 725P17335 space in the XT1 and XT2 Enduro series and the Ultima ZT1 and ZT2 |
| Stock Battery | Cub Cadet 725P17335, a 12V AGM, 210 CCA, about 11Ah, 5.94" x 3.43" x 4.33" |
| Case Size | YTZ10; replaces YTZ10S, YTZ12, YTZ14, BTZ10S, BTZ12, BTZ14, YTX9, YTX7A-BS, YTX12A-BS, BTX9, BTX7A-BS, BTX12A-BS |
| Terminals | 4-terminal design (both sides) |
| Weight | 3.15 lbs |
| Dimensions | 5.9" x 3.46" x 3.62" (L x W x H), about 0.7" lower than the 725P17335 |
| Mounting | Any orientation |
| BMS | Over-charge, over-discharge, thermal protection, cell balancing |
| RE-START Reserve | Built-in jump start, push-button reboot |
| Warranty | 3-Year Antigravity Warranty |
Fits the Cub Cadet XT1 and XT2 Enduro series (the XT1 LT42 and LT46 among them) and the Ultima ZT1 and ZT2 zero turns that take the 725P17335. The ATZ-10-HD matches the original's length and width and stands about 3/4 inch lower, so if your hold-down clamps from above, set a firm spacer under the battery so it cannot shift. If you just want a light battery that holds its charge, the standard ATZ-10 RE-START does that for $55 less; the HD is for the extra capacity. Cub Cadets that take a full-size Group U1 or U1R, like the older LTX tractors, want a U1 from our lawn mower shelf instead. Check the part number on your old battery, and if you are not sure, we will confirm fitment before you order.
Your mower's charging system keeps it topped up as you mow. For storage, any 12V charger with a lithium (LiFePO4) mode works; a lead-acid tender with a desulfation setting is hard on lithium cells, so retire the old one.
Backed by Antigravity's 3-year warranty. Questions about fit? A real USA battery tech picks up at 888-274-7544, Mon-Fri 9a-6p EST.