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KYMCO Downtown 300i Battery

2013. The OEM battery case the Downtown 300i takes, the lithium that drops into it, and every model year we have on file. One case across the whole run.

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2013 KYMCO Downtown 300i

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OEM battery
AT12BSManufacturer fitment list
Case family
AT12BS12V starter case
Fits all years
2013same case every year on file

The KYMCO Downtown 300i takes the AT12BS case. The Antigravity AT12BS RE-START is a drop-in for that case: 360 cranking amps, 3 lb, a built-in jump start that saves enough charge to get you home. Antigravity's list names the AT12BS for this model; Yuasa's guide names the YT12A-BS case for some trims. Go by the code on your old battery.

See the Antigravity AT12BS

Downtown 300i battery by model year

2013Your year · 2013OEM batteryAT12BS12V starter caseWhere it comes fromManufacturer fitment listLithium that fitsAntigravity AT12BS RE-START →Antigravity AT12BS-HD RE-START →Antigravity ATZ-10 RE-START →Antigravity ATZ-10-HD RE-START →Antigravity's list names the AT12BS for this model; Yuasa's guide names the YT12A-BS case for some trims. Go by the code on your old battery.

Trim covered: Downtown 300i.

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What the Downtown 300i needs, in plain English

Every Downtown 300i from the first 2013 model through 2013 starts on the AT12BS case, a 12-volt starter battery. KYMCO 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 AT12BS RE-START: 360 cranking amps, 3 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 AT12BS for this model; Yuasa's guide names the YT12A-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 KYMCO Downtown 300i take?+
The AT12BS case, the same one on every Downtown 300i from 2013 to 2013. The Antigravity AT12BS RE-START is the lithium drop-in for it. Antigravity's list names the AT12BS for this model; Yuasa's guide names the YT12A-BS case for some trims. Go by the code on your old battery.
Will a lithium battery work in a Downtown 300i 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.