Guides for jumper, battery, and 12V know-how.
Real answers to the questions drivers actually ask. Tested, sourced, and updated regularly.
How to jump start a car without another car
The 7-step procedure for using a portable lithium jump starter — no donor vehicle, no cables to a friend's hood.
How many amps to jump start a car?
The exact cranking amps you need by engine size, fuel type, and ambient temperature. Plus peak vs cranking vs CCA.
Best portable jump starter for 2026
Side-by-side comparison of leading lithium jump starters tested across engine sizes and conditions.
How to jump start a completely dead battery (0V)
When standard jump starters refuse to connect — and how 0V Boost mode revives a flatlined battery.
Can jump starters go on planes?
FAA's 100Wh lithium battery rule — how to check your unit's watt-hours and what airline approval actually means.
How long does a jump starter hold its charge?
Self-discharge rates, optimal storage charge level, temperature effects, and the quarterly maintenance schedule.
Jump starter vs jumper cables
Head-to-head on cost, reliability, cold weather, and electronics safety — plus when cables still make sense.
Best jump starter for diesel trucks
What 6.7L Cummins, Power Stroke, and Duramax owners should look for — minimum specs and field-tested picks.
What does UL 2743 certification mean?
The safety standard for portable power packs — what gets tested, what passes, and why it matters for jump starters.