BikeMaster Yumicron 12 Volt Dry BB/YB12C-A BatteryYamaha YFA-1, YFB250, YFB250F 12-Volt Dry batteries Customer must add acid (acid not included) and charge before installation Delivers up to 30% more power (cranking amps) than Standard batteries due to extra plates inside the battery May need periodic refilling 1-year manufacturer&rsquo;s warranty