Dear Customer,
After careful consideration of our long-term business direction, geekmaxi.com will be discontinuing operations as an online store. As of August 21, 2026, we will no longer be accepting new orders.
Looking ahead, we are working with a number of established retail partners so that our customers can continue to find the products they've come to know from us. More details will be made available on our homepage.
We're sincerely thankful for the years of business you've entrusted to us.
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geekmaxi.com
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Powerful Car Battery Jump Starter
With a 4000A peak current, it can start diesel engines up to 10.0L and all gas engines in just a few minutes, including cars, motorcycles, RVs, tractors, trucks, cargo vans, ATVs, snowmobiles, yachts, and many more.
26800mAh Capacity Portable Charger
The GP4000 portable car battery jump starter is equipped with dual USB charging output ports (one compatible with fast charging) and a USB Type-C charging port (5V/3A). You can use it to charge other devices, such as smartphones, tablets, cameras, GPS systems, and more, or recharge the Jump Starter itself.
Safe Metal Smart Clamps
The GOOLOO GP4000 smart jumper cable is constructed with all-metal clamps to prevent damage caused by long-term use. Except for the reverse polarity protection, it includes over-current protection, overload protection, over-voltage protection, and overcharge protection, making it safe for anyone to use.
15V/10A DC Interface
The standard DC cigarette lighter female socket is compatible with any 15V electronic device without occupying the one in the car, which is ideal for portable tire inflators or car vacuum cleaners.
Jump-start Car in Extreme Weather
The operating temperature of GP4000 is arranged from -4 to 104 Fahrenheit. It is easy to jump-start a dead car in ice and snow, and get your car up and running if your battery dies from age or weather.
Durable Material & Flashlight Function
The hardened plastic and rubber corners make sure the starter can withstand drops without any problem. A built-in flashlight with 3 modes can assist you in vehicle emergencies at night.











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