Starts a flat car battery on its own in seconds - no second car and no jump leads from a stranger. Doubles as a 20,000mAh power bank with an LED work light and torch.

Key specs • Peak current: 2000A, starts most petrol and diesel engines • Capacity: 20,000mAh, also charges phones and laptops • Safety: reverse polarity, over-current and spark protection • Extras: LED work light, torch and SOS strobe • Display: charge percentage

In the box Jump starter, jump cables, USB-C cable, carry case

UK notes Read the engine size limit before buying - 2000A covers most cars but not large diesel vans. Keep it charged: a jump starter at 20% will not start anything, which is when people discover it. Store above freezing.