Defective product. It can't be charged at all. I applied for after-sales service for a week but no one cared. Then they directly refused after-sales service. They asked me to change the cable and the plug. I changed several plugs but they didn't work, so I applied for after-sales service. Do they think consumers are fools? The most ridiculous thing is that the USB cable was mailed by them. They asked me to change the cable, but the original one didn't work. It was so funny. I threw it directly into the trash can.