#1
★ Top Pick
Mighty Max Battery YTX9-BS -12 Volt 8 AH, 135 CCA, Rechargeable Maintenance Free SLA AGM Motorcycle Battery
The Mighty Max YTX9-BS matches the Kawasaki Z300's OEM battery spec directly, making installation straightforward with no modification needed. The 135 CCA rating handles the Z300's 296cc parallel-twin reliably across cold morning starts, and the AGM construction means no acid leakage concerns in a tightly packaged frame. The sealed design also eliminates maintenance entirely. Caveat: budget AGM batteries can see reduced capacity after two to three years, so monitor cranking performance as it ages.
View on Amazon ↗