1. Check the international certification.

The portable car jump starter is a tool that accompanies the entire life process of the automobile. The internal environment of the automobile is sometimes very harsh, such as extreme high temperature and low temperature, humidity or dryness, etc. This leads high requirements on the manufacturing level of the car jump sarter, which depends on whether the technology meets the standard of safety requirements. Reliable products need to be certified by FCC, EU CE, US RoHS and other authoritative organizations. And built-in protection system against over-voltage, over-temperature, over-current, etc.

2. Focus on the function,  the capacity, the battery power coefficient.

The capacity and power rates of the car jump starter determine the jump starting ability and jump starting current. Be sure to verify that the manufacturer’s declared product capacity, starting current and other parameters are consistent with the test report. A cheap and poor-quality power supply can also be used a few times, but a high-quality battery can make you run longer.

3. Focus on security.

As far as battery products are concerned, their safety protection must be considered and beware of entering the pit. For example, the "short-circuit protection" that the startup power supply of the whole network has, is it the short-circuit protection of the starter or the short-circuit protection of the USB output port? The difference between the two is a lot.

4. Check the if it work at extreme low temperature.

Especially the test result of jump starting under minus 20℃.