YESPER 4120A Car Jump Starter 24000mAh Power Bank Car Booster Auto Emergency Booster Starting Device Jump Start

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ESTIMATED DELIVERY DATE: Monday, 20 October

Your order will be delivered by the most reliable carriers

FAST US SHIPPING

We offer fast no-contact shipping within the US on every order

FREE & EASY RETURNS

If you’re not thrilled with your purchase, simply send it back for a full refund

Product Details

Item Specifics

Shipping & Delivery

FAQs

About Us

Product Details

Instantly Jump Start 0-Volt Car Battery

Press “BOOST” button, the car battery jump starter can instantly start your completely dead or low-voltage car batteries.

4120A Peak Current

YJS40 car jump starter provides up to 4120A peak current and rated for ALL gasoline engines and up to 10.0-liters diesel engines

24000mAh Bigger Battery Capacity

YJS40 up to 40 jump starts on a single charge and Battery standby time for 18 months

Safe and easy-to-use

Safely connect to any 12-volt vehicle with a rugged and water-resistant and spark-proof technology and reverse polarity protection.Safely start all gas engines and up to 10.0L diesel engines

Smart Safty Cable

With mistake-proof design featuring spark-proof technology ensure it’s safe to use.Also the jumper clamps indicator light will notify you of any common incorrect operating.

The Material Uses ABS V0 Military Grade Fireproof Material

Truly achieve 0 sparks,100% safety

MULTIPLE SAFETYPROTECTION

The battery jump starter provide 10 safty protections to ensure it’s safe to use

PORTABLE EMERGENCY POWER BANK

15V/10A DC OUTPUT For tire inflators, car refrigerator, and more

Super-Bright LED Light

Super-bright light can help you start your car more conveniently at night, and the strobe and SOS modes can act as a lifeguard in emergency situations.

Easy To Jump Start

You can jump start your car totally by yourself without assistance in 4 steps.

4 GREAT REASONS TO BUY FROM US:

Over 37,000 happy customers across the US
Real people on our support team ready to help
The finest materials and stunning design — all our products are developed with an obsessive dedication to quality, durability, and functionality
We use the most secure online ordering systems on the market, and are constantly improving our software to make sure we offer the highest possible security

BUY WITH CONFIDENCE

Our mission is to make your shopping experience as safe and enjoyable as possible. Have questions? Feel free to contact our award-winning customer care team for advice on everything from product specifications to order tracking.

Money back guarantee: Something not quite right? If you’re not totally satisfied with your purchase, you can return it within 15 days for a full refund
Risk-Free Purchase: We utilize industry-standard Secure Sockets Layer (SSL) technology to allow for the encryption of all the sensitive information, so you can be sure your details are completely safe with us
Trustworthy payment method: We partner with the most popular online payment solutions that guarantee enhanced security and fast transaction processing

Item Specifics

Brand Name:

YESPER

Origin:

Mainland China

Hign-concerned Chemical:

None

Battery Capacity(mAh):

20000-30000

Peak Current:

>1200 A

Conversion Rate:

>90%

Number Of Built-in Batteries:

External Testing Certification:

MSDS

External Testing Certification:

ROHS

External Testing Certification:

FCC

External Testing Certification:

UL（纺织品）

Certification:

RoHS

Certification:

MSDS

Certification:

FCC

Certification:

Item Weight:

775

Fast Charge:

Two-Way Fast Charge

Certified:

FCC

Certified:

MSDS

Voltage:

12V

Special Features:

USB

Special Features:

Lighting

Special Features:

Cigarette Lighter Starter

Special Features:

warning light

Special Features:

SOS Lighting

Shipping & Delivery

How much does shipping cost?

We are glad to bring our customers great value and service. That’s why we provide fast shipping from our Fulfillment Center in California by UPS and USPS.

What countries are you delivering to?

As of now, we’re delivering to the United States only.

How can I track my parcel?

Once your parcel has left our Fulfillment Center, you will receive an email with a tracking number to monitor your parcel movements.

Can you ship my order to a business address?

Yes, you can write your business address in your order details if it’s more convenient to you.

Can you ship my order to a PO Box address?

Yes, you can select delivery to a PO Box if it’s more convenient to you.

Can you ship my order to APO or FPO military addresses?

Yes, we ship anywhere in the United States, and to all US territories and military APO/FPO addresses.

What happens to my parcel if it is delivered while I’m not there?

Depending on the destination and the package size, your parcel will be left in your mailbox or on your porch, or it may be left with a neighbour.

FAQs

How to search for products?

Simply type the product name in the Search Bar at the top of any page. Try to enter a general description. The more words you use, the less products you will get on the results page. When you find a product you’re interested in, simply click on its name or image for more details.

Do I need to create an account to place an order?

It’s not a must: you can place your order even if you don’t have an account or aren’t logged in..

How do I place an order?

On the product page with the item you like, select the color or other product variation (if there are any) that you like the most, and click on the Add to Cart button.

As soon as you’ve added everything you wanted to your cart, click on the Proceed to Checkout button.

You will see the list of items you’re ordering, and will be able to remove, add, or edit anything if necessary.

Make sure your shipping details are filled in correctly, and click on the Complete Order button. Finally, select the payment method that’s most convenient to you, and check out.

How do you protect my personal details when I register and check out?

We offer the highest security possible at all times to make sure the online transactions keep your personal information safe..

Following the industry standards, we use the Secure Sockets Layer (SSL) technology to encrypt the information you share with us such as your name, address, and payment details..

Can I buy your items and send them to someone as a gift?

Yes! Simply use this person’s address as the shipping address when you place an order. There will be no price tags on or within the package!.

Can I change or cancel my order?

Yes, if your order has been paid and you need to change or cancel it, you can do this within 12 hours of placing it..

To edit your order details or cancel the purchase, simply use the Contact Us form to send us an email..

An item is missing, wrong, or damaged in my package. What should I do?

We're sorry it’s happened to you! Kindly use the Contact Us form to get in touch with us and tell all the order details so that we could sort it out for you..

About Us

Customer commitment

We’re a company with a customer-obsessed culture and try to meet and exceed your expectations every time you shop our store. Your opinion is our biggest drive for improvement. Feel like a true insider with our exclusive offers and closed promotions.

Passion for our work

We're real fans of what we do! Our store is full of amazing carefully hand-picked products that you won’t find anywhere else, that’s for sure.We strongly believe that great stuff shouldn’t cost a fortune that’s why you can trust us to offer goods for every budget.

Inspiration and creativeness

Get the treat that you deserve and indulge yourself in your favorite merch, we cater for all tastes. Shopping has never been more enjoyable!

Reviews

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P***r

8 Oct 2025

Works very well so far

Yes, I recommend this product

Customer

7 Oct 2025

Everything is great

Yes, I recommend this product

YESPER 4120A Car Jump Starter 24000mAh Power Bank Car Booster Auto Emergency Booster Starting Device Jump Start

4 GREAT REASONS TO BUY FROM US:

BUY WITH CONFIDENCE

How much does shipping cost?

What countries are you delivering to?

How can I track my parcel?

Can you ship my order to a business address?

Can you ship my order to a PO Box address?

Can you ship my order to APO or FPO military addresses?

What happens to my parcel if it is delivered while I’m not there?

How to search for products?

Do I need to create an account to place an order?

How do I place an order?

How do you protect my personal details when I register and check out?

Can I buy your items and send them to someone as a gift?

Can I change or cancel my order?

An item is missing, wrong, or damaged in my package. What should I do?

Reviews

Write a Review

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