DIY Car Battery Replacement: Steps and Safety Notes
Published / Updated
Quick Summary
How to replace a car battery safely, including terminal order, memory settings, and disposal of the old battery.
This English page is based on the Japanese guide and keeps the same practical, safety-first focus.
Battery replacement can be simple, but mistakes are risky
The biggest risks are short circuits, wrong terminal order, and losing vehicle memory settings.
Basic order
- Turn off the car and remove the key.
- Disconnect the negative terminal first.
- Disconnect the positive terminal.
- Remove the battery holder.
- Install the new battery.
- Connect positive first, then negative.
Disposal
Do not throw old batteries away with household trash. Many car-parts stores, battery shops, and repair shops accept used batteries.
