The key factor for an emergency car jump starter is its discharge current, which typically uses small-capacity high-rate power cells with a discharge capability of over 40C (instantaneous current of 200 amperes). The jump starter can be charged from a 110-220V AC power source using a charger. The built-in charging control circuit has an automatic shutdown function to prevent overcharging of the battery.
For an emergency car jump starter, a capacity of approximately 6,000 to 10,000 milliamps (mAh) is generally sufficient. The specific choice depends on your typical usage. If it's for private car use, selecting an emergency jump starter with around 6,000 mAh should be enough, especially for smaller engine models.
In general, electrical devices experience a significantly higher instantaneous current during startup compared to their normal operating current. When starting a car, the momentary current can exceed 200 amperes, which most regular power banks cannot handle. Additionally, they lack the appropriate jumper cable connectors.
When considering an emergency car jump starter, it's important not to focus solely on capacity. The capacity is related to discharge rate, starting current, and the number of jump starts it can provide. The capacity of the jump starter determines how many times it can be used for jump-starting a vehicle. While being able to start a car is essential, having additional practical features is even better.