bcar00
.020 Over
- Joined
- Jan 2, 2025
- Messages
- 31
- Ride
- Rocket 3 GT
I'd like to see if anyone has tried an ATX12-HD. Antigravity doesn't technically make a replacement for this bike, as the ATX12-HD is supposedly only recommended for bikes up to 1500cc. and the ATX20 doesn't fit the Rockets odd sized battery box. Notice it's CA, not CCA in the specs for their batteries. That's 270 CCA (Stock battery) vs. 480 CA (Lithium). Cold Cranking Amps will be significantly lower than Cranking Amps.I've used them before (and the Tiger 1200s come with one) and never had a problem. Can't say the same for the lead-acids, which in my experience always suddenly fail with no warning. The quality of the battery matters greatly--it needs a quality BMS otherwise it'll be prone to sudden and/or early failure. It should perform undercharge protection, overcharge prot., overheat prot., and cell balancing.
If and when the new battery in my Rocket fails, I'm looking at probably replacing it with one of the following:
- Antigravity AG-ATX12-RS RE-START, 6.1 Ah / 360 CCA
- Shorai LFM21A6-BS12, 7 Ah / 315 CCA
At 6-7 Ah, they're roughly equivalent to about a 16 Ah lead-acid when it comes to usable capacity. The lead-acid still contains more energy but using more than half of it will damage it. The main thing is to use a charger designed for Lithium batteries if you keep your bike(s) hooked up to one. (I use the Harley-Davidson four-bike charger, which has individual options for Lead-Acid, AGM, and Lithium for each of its four outputs).
Edit: Looks like there's an Antigravity ATX12-HD RE-START that also fits with 480 CCA and 8 Ah. Hmmm...
...as an aside, Antigravity is the only Lithium battery I'll use. I've used them on at lease half a dozen bikes without issues. The one time I went with another brand, I had the problems jackrotten referenced.