Safety and Disconnecting Old Batteries
At 5:36 in
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What happens here
Before disconnecting anything, the presenter emphasizes electrical safety by removing all metal jewelry (rings, watches) and wearing insulated gloves. The state of the old lead-acid batteries is documented using a multimeter to check individual battery voltages. The measurements show inconsistent voltages (e.g., 8.2V, 8.1V, 8.0V, 7.9V, 7.8V, 7.6V), indicating cells are out of balance and dropping fast under load. The water levels in the lead-acid batteries are also checked, with most being low and one being nearly dry, a classic problem highlighting the high maintenance of lead-acid. To begin removal, the negative battery cable is disconnected first, as it is the ground side, to prevent accidental short circuits if a wrench touches the frame while working on positive terminals. Then, positive cables are disconnected one by one along the series chain.
Goal: Safely prepare for and disconnect the old lead-acid batteries.
Tools and materials
- Impact wrench — Quickly loosening and tightening battery terminal nuts
- Insulated gloves BOSS — Protecting hands during electrical work
- Led-acid batteries — The old batteries to be disconnected
- Multimeter — Measuring individual battery voltages