NOCO Boost X GBX155: 4250A UltraSafe Jump Starter – 12V Lithium Battery Booster Pack, Portable Jump Box, Power Bank & Jumper Cables - for 10.0L Gas and 8.0L Diesel Engines

Q: What is the Mah rating on this device?

The user manual rates it at 99 watt hours and it supports a variable output voltage of between 5 and 20 watts. So, running at 5 volts, your mAH would be 99Wh / 5V = 19.8 Ah * 1000 = 19,800 mAH. At 12 volts, you would have 99 / 12 * 1000 = 8,250 mAH. At 20 volts, 99 / 20 * 1000 = 4,950 mAH. From what I've seen, USB power banks usually use the 5V standard for calculating mAH, so for comparison purposes, this is probably the one you'll want to use. Hope this helps!

Q: What is the correct Noco email for customer support?

support@no.co (That is indeed supposed to read ".co", NOT ".com")

Q: The boost led does not come on after i plugged it into the battery? any help would be appreciated it

Does any other lights flash? I had a short in the alternator and would cause the exclamation icon next to the battery gauge to flash and the boost LED would not come on.

Product ID: 320429699

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Details

Brand
NOCO
Product Dimensions
8.18"D x x
Item Weight
7 Pounds
Amperage
4250 Amps
Peak Output Current
4250 Amps

⚡4250A peak amps for extreme starts

🔋2.7h USB-C turbo recharge

🔦500-lumen multi-mode LED flashlight

Description

⚡ Power Up Fast, Stay Safe Always!

LIGHT UP THE NIGHT - Integrated 500-lumen LED with 7 modes including SOS & strobe—your ultimate roadside companion.
POWER BANK ON DEMAND - 60W USB-C output charges your phone, tablet, or laptop—stay connected wherever you go.
SAFETY MEETS INNOVATION - Ultrasafe 2.0 tech with spark-proof & reverse polarity protection for worry-free jumps every time.
TURBO RECHARGE IN A FLASH - USB-C Power Delivery recharges fully in 2.7 hours or gains a jump start charge in just 5 minutes.
EXTREME POWER ZERO COMPROMISE - 4250 amps to jump gas engines up to 10.0L & diesel up to 8.0L—never get stranded again.

The NOCOBoost X GBX155 is a cutting-edge 4250A lithium jump starter designed for professional-grade performance on 12V vehicles with gas engines up to 10.0L and diesel engines up to 8.0L. Featuring advanced Ultrasafe 2.0 technology, rapid USB-C turbo charging, and a versatile 500-lumen LED flashlight, it doubles as a high-output power bank with 60W USB-C delivery. Compact yet robust, it delivers up to 18 jump starts per charge, making it an essential tool for any millennial manager who values reliability, speed, and safety on the road.

Specifications

Brand	NOCO
Product Dimensions	8.18"D x 4.84"W x 13.51"H
Item Weight	7 Pounds
Amperage	4250 Amps
Peak Output Current	4250 Amps
Specification Met	energy
Manufacturer	NOCO
UPC	046221200096
Global Trade Identification Number	00046221200096
OEM Part Number	GBX155
Automotive Fit Type	Universal Fit
Model	GBX155
Item Weight	7.01 pounds
Item model number	GBX155
Batteries	1 Lithium Ion batteries required.
Exterior	Machined
Manufacturer Part Number	GBX155
Position	Unknown
Bulb Type	LED
Special Features	4250A 12V Portable Lithium Car Battery Jump Starter Power Pack, 500 Lumen LED Flashlight with Multiple Modes, including SOS., 60-Watt USB-C Power Delivery Technology, Portable Power Bank for USB Devices, Reverse Polarity and Spark-Proof Protection