Free Shipping $199+
LithiumBatteryz

Triumph Rocket III Roadster Battery

2010–2018. The OEM battery case the Rocket III Roadster takes, the lithium that drops into it, and every model year we have on file. One case across the whole run.

Your Ride
Year
Make
Model
Change any box to look up another bike.
Your ride

2018 Triumph Rocket III Roadster

Not yours?
OEM battery
YTX20Manufacturer fitment list
Case family
YTX2012V starter case
Fits all years
2010–2018same case every year on file

The Triumph Rocket III Roadster takes the YTX20 case. The Antigravity ATX20 RE-START is a drop-in for that case: 680 cranking amps, 4 lb, a built-in jump start that saves enough charge to get you home. Antigravity's list names the YTX20 for this model; Yuasa's guide names the YTX20L-BS case for some trims. Go by the code on your old battery.

See the Antigravity ATX20

Rocket III Roadster battery by model year

2010–2018Your year · 2018OEM batteryYTX2012V starter caseWhere it comes fromManufacturer fitment listLithium that fitsAntigravity ATX20 RE-START →Antigravity ATX20-HD →Ionic S6 →Antigravity's list names the YTX20 for this model; Yuasa's guide names the YTX20L-BS case for some trims. Go by the code on your old battery.

Trim covered: Rocket III Roadster.

Shop all Triumph batteries

What the Rocket III Roadster needs, in plain English

Every Rocket III Roadster from the first 2010 model through 2018 starts on the YTX20 case, a 12-volt starter battery. Triumph ships it with a lead-acid battery that starts to fade after two or three seasons of short rides and off-season storage, and that is usually the day a rider goes looking for something better.

The lithium drop-in is the Antigravity ATX20 RE-START: 680 cranking amps, 4 pounds, the same case in lithium. Its RE-START function puts the battery to sleep before a parasitic draw can drain it, then wakes it with one press for a jump start. Antigravity's list names the YTX20 for this model; Yuasa's guide names the YTX20L-BS case for some trims. Go by the code on your old battery. Charge it with a lithium-compatible charger or maintainer for the off-season and it outlasts the lead-acid battery it replaces by years.

What size battery does a Triumph Rocket III Roadster take?+
The YTX20 case, the same one on every Rocket III Roadster from 2010 to 2018. The Antigravity ATX20 RE-START is the lithium drop-in for it. Antigravity's list names the YTX20 for this model; Yuasa's guide names the YTX20L-BS case for some trims. Go by the code on your old battery.
Will a lithium battery work in a Rocket III Roadster without changes?+
Yes, on a bike with a healthy charging system: the lithium battery uses the same case, the same posts and the same cables, and it drops in where the lead-acid battery sat. Bikes older than about 2000 should have their voltage regulator and rectifier checked first, since a failing one overcharges any battery and lithium tolerates it less. Fill any gap in the tray with the foam spacers most lithium motorcycle batteries include.
Do I need a different charger for a lithium motorcycle battery?+
Use a charger or maintainer with a lithium (LiFePO4) mode. A lead-acid trickle charger can push the wrong voltage profile, and a desulfation mode can damage a lithium pack. A lithium-profile maintainer over the off-season keeps it topped without harm, and the battery loses only a few percent of charge a month sitting on its own.