Mobile phone current maintenance method has been widely used in the mobile phone industry. Through Different current levels are used to determine the cause of the malfunction of the mobile phone, and to eliminate possible hidden troubles or leakage.This product with battery data can simulate the battery working environment in real time, so that the motherboard of the mobile phone can work for a long time without shutting down or restarting. Easy to use and accurate measurement. The product is compact and easy to carry, and it can replace the bulky desktop power supply with only one charging plug, which brings convenience to home maintenance.