Antigravity ATX20-HD 12V Jet Ski Battery 780CA (30Ah Heavy Duty)

Antigravity ATX20-HD 12V Jet Ski Battery 780CA: 30 Amp-Hours for a Ski That Runs a Stereo All Afternoon

Almost every personal watercraft on the water starts on a YTX20L: Sea-Doo's GTI, GTX, RXP and RXT, Yamaha's WaveRunner FX, VX and GP, Kawasaki's Ultra and STX. The ATX20-HD is Antigravity's heavy-duty battery for that case: a full 15Ah lithium pack (30Ah lead-acid equivalent) and 780 cranking amps at 5.18 lbs, roughly twice the capacity of other lithium in this size.

A ski that idles at the sandbar with the audio on, then has to crank a supercharged 1600 in the afternoon, is the machine this battery was built for. There is no RE-START reserve on the HD; in its place you get the capacity, a deeper usable discharge, and a lighted voltage indicator on top so one press tells you where it stands before you leave the dock.

Why the ATX20-HD in your ski

• 780 cranking amps for supercharged 1500 and 1600cc triples and fours
• 30Ah lead-acid equivalent (15Ah lithium, 192Wh): the most capacity in a YTX20 case from any brand
• 5.18 lbs replaces a lead-acid brick that weighs close to 14; sealed, vibration resistant, no acid to spill in a hull
• Replaces YTX20, YTX20L-BS, YTX20H-BS, YTX20HL-BS, YTX15L-BS, YIX20HL and the GYZ20 family (15 OEM sizes)
• Push-button voltage indicator; 4-terminal design fits either terminal layout
• Full BMS: over-charge, over-discharge, thermal protection, cell balancing

Antigravity Heavy Duty RE-START Battery Video Review

ATX20-HD Heavy Duty Specs for Nerds

Fits Sea-Doo GTI, GTX, RXP, RXT, Fish Pro and Spark, Yamaha WaveRunner FX, VX, GP and EX, Kawasaki Ultra 310, STX and SX-R, Honda AquaTrax and other watercraft on the YTX20L case. Stock ski, no stereo? The ATX20 RE-START saves you money and adds the built-in jump start. Check your OEM code against the list above, and if you are not sure, we will confirm fitment before you order.

Backed by Antigravity's 3-year powersports warranty. Questions about fit or rigging? A real USA battery tech picks up at 1-800-LBZ-POWR, Mon-Fri 9a-6p EST.