1. Insert clamps into the EC5 port.

Is GK-J1205 suitable for my vehicle?

The GK-J1205 suits cars, trucks, boats, buses, SUVs, RVs, lawn mowers, motorcycles, and more, with gasoline engines up to 10.0L and diesel engines up to 10.0L. Designed for 12V lead-acid batteries only, not for other battery types.

What should I do before using the jump starter?

All Green Keeper jump starters come partially charged out of the box but need to be charged prior to first use.

How many times can I charge my phone with GK-J1205？

To determine how many times a 3.7V/24000mAh power bank can charge an iPhone (3000mAh battery), consider power transfer efficiency (60%). A 100% charged GK-J1204 can charge the phone approximately 5 times, accounting for the 60% conversion efficiency

Why does your product prominently display the peak current on the cover, while others don't?

Many products avoid printing this to allow flexibility in altering peak current claims on listings. We print the actual, tested peak current directly on the product, ensuring transparency and reliable performance.

Manufacturer	Shenzhen Crosstech Co.,Ltd
Brand	GREEN KEEPER
Model	GK-J1205
Product Dimensions	8.97 x 21.23 x 10.57 cm; 1.32 kg
Batteries	1 Lithium Metal batteries required. (included)
Item model number	GK-J1205
Manufacturer part number	GK-J1205
Amperage	4000 Amps
Item Weight	1.32 kg

Portable Car Jump Starter 4000A: 12V Battery Jumper Emergency for 10.0L Gas Diesel Engines, Power Booster Start Boost Charger, Intelligent Protection, USB-A Type-C Ports with mutifuctional Light

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