Buying guide Best portable jump starters
Ten cold cranks each, then left in the boot for a month.
Bought at retail, fitted to a real vehicle, run for 30 days minimum. Some links earn commission — never a better score.
Tyre inflators, jump starters and the small gear that lives in the boot.
Inflators ranked on how long they take a cold 225/45.
Cranking a dead 2.0 L four in the cold, ten times over.
The five things worth the space, and what to leave out.
No review units, no press trips, no scores traded for commission.