Why is the output voltage higher than the marked 12V when jump starting a car?

Answer:

It's quite common that the actual output voltage, 15V, goes higher than the marked one 12V. What we have done is ensure the successful rate of a jump start.

How can it make that:

1) The more the battery power the jump starter has remaining, the higher the output voltage.

2) Although the designed output voltage is rated at a value, it will fluctuate within a specific range.

Please don’t worry about the difference, we have taken multiple safety protections to ensure your safety.