lengfeng

I made a trolley car, and used chip LTC4054 to charge the 3.7-volt lithium battery. Before I used the phone lithium battery while debugging, and charging had been no exception. After connected to the motor，the moment the motor started，the battery was under protection. So I bought a 20C discharge lithium battery in Taobao, and then the motor can be started.But I found that the chip was hot within two seconds when charging. I was worried about that and now no longer dare to charge. How should I do? Is the battery problem? I also tried with the 18650 battery and it can also drive the motor, as well as charging is normal. Please give guidance.Thanks!