Will it start a 7L diesel engine?

Audew rates it for diesel engines up to 7L and gas up to 9L. That is a peak-amp claim, so a healthy, fully charged pack is needed for the largest engines.

How do I recharge the jump starter?

It charges over USB, and the 20,000 mAh battery also works as a power bank for phones and other devices. Charge it every few months so it is ready when needed.

Does it come with a warranty?

The listing states no written warranty. Keep your receipt and check the seller's return window before relying on it.

The jump starter and jumper clamps are included. There is no carry case listed, so plan to store it in a glovebox or trunk bag.

Is $55.99 a good price?

Only one store lists it new at $55.99 as of November 8, 2026, so there is little price history to judge against. For a 20,000 mAh, 3000 A pack it is inexpensive, but verify the seller and return terms.