A slim portable jump starter and power bank, listed by the supplier at 20,000mAh. Kept charged in the glovebox, it starts a car with a flat battery without needing a second vehicle and jump leads, and between emergencies it doubles as a power bank for charging phones and other USB devices on a long trip.
Capacity: 20,000mAh (supplier rating)
Functions: jump starter and USB power bank
Slim, portable design
Fitment: check the listing details for the engine sizes it will start (petrol and diesel limits differ), the clamps and charging cable supplied, and the safety protections before ordering.
Practical tip: charge it fully when it arrives and top it up every couple of months, because a jump starter that has sat flat in the boot all year is no use on a January morning. Connect red to the battery positive and black to a bare metal earth point, start the car, then remove the clamps in reverse order. See our winter driving checklist and breakdown guide.
