How to jump-start with two 24V batteries?

1 Answers
JakeAnn
07/25/25 1:39am
Connect positive to positive and negative to negative, but note that this refers to the terminals after two batteries are connected in series to form 24V. Do not connect to a single battery. Below is relevant information: 1. Connection sequence purpose: During overcharging, lead-acid batteries may produce flammable hydrogen gas through water electrolysis inside the battery. Jump-start procedures are usually described in the vehicle's manual. The recommended connection sequence aims to reduce the chance of accidentally short-circuiting the good battery or igniting hydrogen gas. The user manual should indicate the preferred locations for jumper cable connections. 2. Battery lifespan: Car batteries typically last 3-5 years, depending on usage. Power consumption increases significantly if you frequently use air conditioning, play music/videos without starting the engine, or forget to turn off headlights.
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