Thank you for your feedback, but there are some misunderstandings. There is no problem in the battery shipment test, the normal power supply should be caused by the wiring problem of your car, the battery is produced in full accordance with your requirements, you ask us to refund the battery money, but do not return the battery to us, we can't help you better analyze the problem. If you need us to cooperate with the after-sales service, Our engineers will help you solve the problem.