BOOKOO A9 Jump Starter 4000A for Car,Boat,Lawnmower 12L Gas&10L Diesel Engines Portable 12V Car Battery Jump Starter with Jumper Cables,Quick Charging USB Ports and USB C,3 LED Modes and Storage Box

Price: $59.99 - $35.14
(as of Jul 25, 2026 21:50:40 UTC – Details)
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YOUR ESSENTIAL ROADSIDE TOOL

ESCORT YOUR ROAD TRIPS

BOOKOO is a manufacturer of automotive tools and outdoor portable power station.Provide more support and power for outdoor adventures.

With 10 years of R&D and production experience, we strictly control product quality.Coupled with a 2-year and 24-hour after-sales service, we provide all drivers with better starting tools to ensure a relaxed driving journey

BOOKOO JUMP STARTER

2026 NEW JUMP STARTER

2026 NEW JUMP STARTER

What types of batteries can this battery booster start?

It can start 8.0 L gas/7.0 L diesel engines and other 12 V vehicles like motorcycles, cars, SUVs, pickups, or lawnmowers.

How often does it need to recharged?

It’s best to recharge it within 3 months.

Why did the jump starter fail to jumpstart my truck in winter?

The battery can perform optimally in extreme cold weather, even at -4ºF~149ºF

POWERFUL JUMP STARTER 4000A/20000mAh: The 74Wh portable lithium car battery jump starter can safely jump start a low volt,drain or dead car battery in seconds with this 4000A car starter, rated for gasoline engines up to 12L and diesel engines up to 10L. Can work at -4ºF~149ºF extreme environments for Passager,Truck, Garden tractor, Generator, lawn Mower, Farm tractor, Riding mower, Motorcycles, Boat, Snowmobiling, ATVs, RV, Van, SUV, Watercraft, Yacht
BATTERY JUMPER STARTER PROTABLE: Compact size and lightwight (8.6″x5.5″x3.5″,0.9lbs), easy to use and carry,can be storaged easily in the glove box of your car, safe and space-saving; comes with a storage box for the battery pack, car accessories are not easy to lose,also protects the car jumper from missed-touch
MORE THAN A CAR BATTERY JUMP STARTER: More than a car battery jump starter, the BOOKOO A9 designed with 2 USB outputs (5V/2.1A)and (5V/3A 9V/2A 12V/1.5A);The quick charge 3.0 USB port can fully charge your tablet, smartphone, GPS, camera, camcorders, Bluetooth headphones and other mobile devices at the fastest (up to 75% faster than a standard chargers)
MULTI FUNCATION JUMP BOX: Not just a jump box, it has 3 LED lights modes: Flash Light, Strobe Light, and SOS Light. This multi-purpose flashlight comes in handy in case of picnic, travel, emergency and outdoor adventures; 400LM 5W LED can work more than 10 hours,weather you take it for reading or for help
RELIABLE & 8 SAFE FEATURESL: The BOOKOO A9 jump starter 4000 A is super safe to use with 10 protections including: over-current, over-load, over-voltage,over-charge,short circuits, reverse polarity, power surging and sparking,and so forth; You can detect the errors by simply checking the lights and the beep sound from the smart jumper clamps.
LONG LASTING & LARGE CAPACITY: This A9 jumpstart was used a premium lithium-ion battery pack, 20000 mAh large capacity battery backup can start dead battery over 50 times and recharge your iPhone 4x, watch 10x, headphones 15x, suitable for more on-the-go devices; 18W Type-C input and QC 3.0 output allow you to power them up any time any where
IP66 WATER RESISTANT FOR EXTREME WEATHER: BOOKOO Jump starters fitted with a waterproof rubber stopper, allows you to start your car in raining or snowy day; And it can work easily at -4ºF~149ºF temp weather you are in California, Texas or Florida
WHAT YOU GET: A9 Jump Starter, Smart Jumper Clamps, Micro USB A to USB C Cable, Hard carrying case, User Guide, lifetime technical support,24-month warranty and worry free after-sale service 24/7