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12V High CCA Electric Chainsaw Motorcycle Sodium-Ion Starter Battery. Ultra-Long Cycle Life: Pulse cycle life exceeds 30,000 times with over 2 years usage life. High Safety Level: Fireproof, explosion-proof, flame retardant, and vibration-resistant. Fast Starting Efficiency: 0.5s start-up time with high instantaneous discharge rate of 165A. Low Self-Discharge Rate: Self-discharge is less than 2% per month in normal storage conditions. Lightweight Design: Lighter than lead-acid batteries for convenient transport. Environmentally Friendly: No heavy metal pollution and no radiation. Fast Charging Support: Supports fast charging with good rate performance.