What Size Wrench is Needed for Car Battery Screws?
2 Answers
An 8-12 size wrench is typically used for removing car batteries. Below is an introduction to the relevant content: Specification and Model Selection: The size of the wrench required varies depending on the car and battery specifications. For example, Wuling Motors use 12V 5A or 6A batteries, and an 8-size wrench is sufficient to remove the battery screws. Locate the battery position, where you will see a fixed bar secured on top of the battery. Use the corresponding size wrench to loosen it. Removal Method: After loosening, remove the bar. Next to the battery, you will see icons indicating the + (positive) and - (negative) terminals. Always remove the negative terminal first, as contact with metal can cause a short circuit in the car's electrical system, most commonly resulting in sparking. After removing the negative terminal, proceed to remove the positive terminal, being careful to avoid contact with metal during the process. Then, install the new battery by placing it in position. Follow the removal steps in reverse: first secure the fixed bar into the lower groove and then tighten it.
Last time I changed the battery myself, I finally figured this out. For most car batteries, a 10mm or 13mm socket wrench works best - Japanese cars generally use the smaller 10mm, while German cars often require 13mm. It's wise to have an adjustable wrench or socket set handy during the job. I ran into an awkward situation last time: the previous owner had overtightened the bolts, and my 10mm wrench nearly slipped before I switched to a 13mm. Pay special attention to the sequence - always disconnect the negative terminal first to prevent short circuits, then the positive. When reinstalling, reverse the order. Keeping a ratchet wrench set in your trunk is incredibly useful - it handles different sizes with ease, saves effort, and can even help neighbors in emergencies.
