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12v Battery Needs Charging - 2025 petrol car
- Thread starter trew
- Start date
If the charger is suitable then yes, you can charge the battery whilst it's still on the car.
If the vehicle is a PHEV then you need to charge it through the engine bay points like in the picture I have attached.
If it's a normal I.C.E engine then the live needs to go onto the battery positive terminal and the earth on the earth point on the bulkhead like in the picture attached.
If the issue persists, I'd speak to your supplying retailer to look into the battery possibly being defective.
If the vehicle is a PHEV then you need to charge it through the engine bay points like in the picture I have attached.
If it's a normal I.C.E engine then the live needs to go onto the battery positive terminal and the earth on the earth point on the bulkhead like in the picture attached.
If the issue persists, I'd speak to your supplying retailer to look into the battery possibly being defective.
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20250930_121158.jpg
Yeah as mentioned on your introduction post I've had to charge mine a couple of times now and once had the tech's out as it was dead. They said the battery health was good so didn't need replacing. Now I just keep one eye open with it.
I took a trip to my local (trusted) mechanic this morning and asked him. He confirmed that, with a decent charger, he would foresee no issues charging the 12v in my car without disconnecting the battery.
I didn't want to go back to the main dealer, for fear of them trying to take a load of money off me, unnecessarily. That's what dealers do, isn't it lol?
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20250930_144604.jpg
Some historical data will be stored in the CAN gateway but it's not interrogated during diagnostic work.
