Will it start a completely dead battery?

I started a vehicle with stolen battery, just use "boost" button. This button forces voltage to be present from YESPER even when no voltage detected from target. The normal safety protocol requires target voltage to be detected before YESPER will supply voltage itself this safety is YESPER proving correct cable hookup. In my nobattery present jump the Vehicle started right up and remained running. Obviously, target vehicle died the instant I removed YESPER and I did not let YESPER stay connected but a few seconds. The point of here is to say yes, it will start when a vehicle with a totally dead battery.

Can transport it abroad?

Dear Customer: Which country are you from? If you are interested in our products, we are willing to arrange another shipping specially for you. For further communication, you can email us. We provide a timely online response for our customers. Sincerely Yesper

Is this yesper set up to allow for faster home charging, like using a 30w usb c charger wall adapter? or some other way to speed that up? thanks!

No box say's 15 watts input! Got one from amazon works great.

If after hooking this up and cranking the starter it does not start what steps need to take place to try and start it again?

Ok...when you read the little booklet it will tell you...there is a little button near the blinking green light you press to fully energize...that should get you your solid green light.

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YESPER 4120A 12V Car Battery Jump Starter Portable Pack

Product ID: 414132001

Details

Battery Cell Composition
Polymer
Brand
YESPER
Product Dimensions
8.82"D x x
Vehicle Service Type
Passenger Car
Voltage
12 volts

⚡4120A peak jump start power

🔋26800mAh high-capacity battery

🛠️Multi-port USB & DC output

R3914

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

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Description

🚗⚡ Jumpstart your freedom—power, portability, and peace of mind in one sleek pack!

UNMATCHED JUMP POWER - Real 4120A peak amps to jump start ALL 12V vehicles, including gas and 10L diesel engines—never get stranded again.
RUGGED SMART DESIGN - Fire-proof ABS shell with rain, dust, and drop resistance plus advanced DSLI IV tech for 30% higher voltage and ultra-safe starts.
COMPACT TRAVEL READY - Lightweight 1.38 lbs with sleek carry case—fits perfectly in your glove box or backpack for on-the-go peace of mind.
MASSIVE 26800 M AH BATTERY - Power through up to 60 jump starts on a single charge plus fast-charge your devices with USB QC & Type-C ports.
EMERGENCY READY LED MODES - Triple LED flashlight with steady, strobe, and SOS modes—your ultimate companion for roadside or outdoor emergencies.

The YESPER 4120A 12V Car Battery Jump Starter is a powerhouse portable jump pack featuring a massive 26800mAh polymer battery capable of delivering 4120 amps peak current. Designed for all 12V vehicles including large 10L diesel engines, it offers up to 60 jump starts per charge. Compact and lightweight with a durable fire-proof ABS casing, it includes multi-mode LED lighting and versatile USB/Type-C/DC ports for charging devices and powering accessories. Advanced DSLI IV intelligent control technology ensures faster, safer starts even in extreme temperatures, making it an essential tool for every driver and outdoor enthusiast.

Specifications

ASIN	B09Q15SPZJ
Amperage	4120 A
Battery Capacity	26800 milliamp_hours
Battery Type	Polymer
Best Sellers Rank	#56,560 in Automotive ( See Top 100 in Automotive ) #261 in Jump Starters
Brand Name	YESPER
Compatible with Vehicle Type	Passenger Car, Motorcycle, ATV, RV, UTV, Truck,Snowmobile, Lawn Mower
Customer Reviews	4.6 4.6 out of 5 stars (1,253)
Item Dimensions D x W x H	8.82"D x 3.53"W x 1.72"H
Item Highlight	26800mAh Battery Start Booster Box(All Gas, up to 10.0L Diesel Engine), with Carry Case, Jumper Cables, LED Light
Manufacturer	YESPER
Manufacturer Part Number	YESPER
Model Number	YJS40
Number of Items	1
Peak Output Current	4120 A
Voltage	12 volts

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R3914

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Africa.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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2 weeks ago

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