How Long Does A Battery Last After A Jump Start. A battery must be a room temperature for at least 12 hours before you test or charge it. Worse yet you cant determine the core temperature of a battery by measuring the temperature of the case.
Park the charging vehicle close enough to the vehicle with the battery so the cables reach to both cars. The good news is if a battery dies prematurely or less than two or five years jump starting it will allow you to recharge it. The answer is it dependsper the instructions above the range can go anywhere from a measly 2-minutes to as long as 10-minutes or even 30-minutes in extreme cases.
Youd even be lucky to have your jumper battery last for those three years.
However a jump-starter will give your car the ability to charge the battery itself by means of the alternator. This often times becomes very apparent in frigid temperatures where an engine needs more amperage to start and a cold battery supplies even less. If the battery ran down to something like the headlights being left on or alternator failure the battery will only lose a few weeks of life out of what was remaining which could be many years. Connect the black negative to the negative terminals on each vehicles.
