打不着火先别急着换电池：把“没转、转得慢、转了不着”说清楚

Separate no-crank, slow-crank and crank-but-no-start symptoms. Note the first attempt, parking duration, temperature, dashboard messages and recent electrical accessories. Battery charge, battery health and the vehicle's charging or parked-current behavior are different questions. A battery reading alone does not establish the root cause. Repeated discharge after replacement calls for further investigation, not automatic replacement again. Hybrids and EVs may enter READY without a combustion engine starting. Stop repeated attempts and follow the exact manual for any jump-start procedure; terminal locations and permitted power sources vary. Do not attempt a start around leaking fuel, smoke or a damaged battery.