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Professional power in your hands
No more waiting for roadside assistance
Jump starts in freezing winter weather
Fits easily in glove compartment
Spark-proof clamps prevent dangerous accidents
Professional 1000A peak current power
Ready to use in seconds
Saves hundreds on towing fees
Lasts 1000+ charging cycles
Professional-grade power meets portable convenience
Dead battery in a parking lot? Stranded at work? That sinking feeling when your engine won't turn over can ruin your entire day and leave you helpless.
Our 1000A peak current instantly cranks any gasoline or diesel engine, getting you mobile again without waiting for help.
The same 18800mAh lithium technology trusted by mechanics and emergency responders, now compact enough for everyday drivers.
Simply connect the spark-proof clamps, press the power button, and start your engine like nothing happened.
Connect positive to positive, negative to negative, power on, and start your engine - no technical knowledge required.
Automatically detects your engine size and delivers the perfect amount of power for safe, reliable starting.
Extra power mode for larger engines, cold weather, or severely depleted batteries that need maximum cranking amps.
Spark-proof technology and reverse polarity protection prevent dangerous mistakes that could damage your vehicle or hurt you.
Everything you need when batteries fail
Engineered specifically for real-world emergency situations where reliability and safety matter most than anything else.
Cranks any gasoline or diesel engine instantly, even in freezing weather conditions.
Advanced protection prevents dangerous sparks and protects against reverse polarity connection mistakes.
Charges phones, tablets, and devices when you're stranded or camping off-grid.
Multiple lighting modes including strobe for roadside visibility and emergency signaling.
No technical knowledge required
Real customers sharing their rescue stories
Over 12,000 drivers trust Cosari to get them out of dead battery emergencies, from parking lots to remote camping trips.
Stop worrying about dead batteries and take charge of roadside emergencies with professional-grade power that actually works when you need it most.
Control your schedule, not theirs
While others wait hours for help, you're back on the road in minutes with professional power you control.
From daily commuters to weekend adventurers across North America
4.7 stars from verified emergency rescues
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Automotive Emergency Specialist
After 15 years responding to roadside emergencies, I designed the Cosari jump starter to give everyday drivers the same reliable power we use professionally. Too many people get stranded because their emergency gear fails when they need it most. This unit delivers consistent 1000A cranking power in any weather, with foolproof safety features that prevent the dangerous mistakes I see with cheap alternatives. It's the jump starter I keep in my own family's vehicles because I trust it to work when everything else fails.
Mark Stevens, ASE
Try it risk-free for 30 days. If it doesn't rescue you when needed, return for full refund.
Limited inventory at this discount price
4.7
Only 47 units remaining
4.7
Only 47 units remaining
30-day money back guarantee included
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SPARK-PROOF SAFE
Cosari creates professional-grade emergency automotive equipment that gives everyday drivers the confidence and capability to handle roadside emergencies without waiting for help or risking safety with inferior tools.
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4.7 stars from 3,247 verified customers
3,247 reviews