Harley-Davidson FLH Battery
1965–1985. Harley-Davidson changed the FLH's battery once across the run. Pick your year and we show the case that year takes and the lithium that fits it. Change any box in the strip to look up another bike.
1985 Harley-Davidson FLH
- OEM battery
- YTX24HLYuasa 2026 OEM guide
- Case family
- YTX24L12V starter case
- This battery fits
- 1979–1985other years take a different case
The Harley-Davidson FLH takes the YTX24HL 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.
See the Antigravity ATX20
FLH battery by model year
| Model years | OEM battery | Where it comes from | Lithium that fits |
|---|---|---|---|
| 1965–1978 | OEM batteryYHD-12H12V starter case | Where it comes fromYuasa 2026 OEM guide | Lithium that fitsNot stocked yet (needs a YHD-12H-case lithium). Call us and we will point you at the right battery. |
| 1979–1984 | OEM batteryYHD-12H12V starter case | Where it comes fromYuasa 2026 OEM guideAntigravity fitment list agrees | Lithium that fitsAntigravity ATX20 RE-START →Antigravity ATX20-HD → |
| 1985Your year · 1985 | OEM batteryYTX24HL12V starter case | Where it comes fromYuasa 2026 OEM guideAntigravity fitment list agrees | Lithium that fitsAntigravity ATX20 RE-START →Antigravity ATX20-HD →Ionic S6 → |
Trim covered: FLH.
Shop all Harley-Davidson batteriesWhy the year matters on this one
The FLH is a motorcycle where the battery changed mid-run: 1965 to 1984 takes the YHD-12H and 1985 the YTX24HL. The plate above names the source for each year, and the table shows every run we have on file, so match the year to the case before you order.
For 1985 that means 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. Charge it with a lithium-compatible charger or maintainer for the off-season and it outlasts the lead-acid battery it replaces by years.