Is this the type of jumper that you charge inside, by plugging it in, then you are able to jump-start your car with nothing plugged in.

Yes, you can charge it in the house or garage, then you can carry it down the driveway, or down the street... My last one I would charge it up about every 4 weeks to every 6 weeks. I believe I was able to Jump-Start 3 vehicles, but possibly a 4th one, without any issues.... Although this Unit is not really light like one of those Small Hand Held Units, These Units are larger/heavier ones. They can handle Stronger Boosts, and For Longer Periods Of Time..... I'm also getting Battery Tester. Amazon has one for $12.88 Prime 2-Day Shipping. That way I know if it's a Battery Issue, Alternator Issue, or when it's showing a Full Charge, then only starts with someone Jumping the vehicle, then it's probably the Starter....

is there a DC converter from 120v to 240v? my country (singapore) is using 240v wall socket

Yes, I've ordered a small one (200watts) recently off Amazon. The Simran SMF-200 Delux Step Down Voltage Converter...

can you use it to charge a cell phone? Could you use it to run portable dvd players?

Yes and yes. As long as you don't exceed 5 amps. And I believe those two things qualify

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J309 Portable Power Station Jump Starter 600 Peak Amp Battery Booster, 3.1A USB Ports, Battery Clamps

J309 Portable Power Station Jump Starter 600 Peak Amp Battery Booster, 3.1A USB Ports, Battery Clamps

Product ID: 1202394

Details

Battery Cell Composition
Lead Acid
Brand
STANLEY
Product Dimensions
10"D x 4.5"W x
Vehicle Service Type
Passenger Car
Voltage
12 Volts

⚡600 peak amps jump-start power

🔋7Ah lead-acid battery capacity

🔌3x USB ports for device charging

210176CFA

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Sold byAmazon SenegalDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Power up your peace of mind—jumpstart like a pro, anytime, anywhere!

POWER ON THE GO - Triple USB ports keep your essential devices charged while you handle the unexpected.
360 VISIBILITY - 270-degree rotating LED light ensures you can work safely in the darkest conditions.
SMART SAFETY ALERT - Reverse polarity alarm protects your vehicle and you from improper connections—jump with confidence.
ALL WEATHER WARRIOR - Lead-acid battery performs in extreme temperatures, perfect for cold-weather emergencies.
INSTANT ROADSIDE SAVIOR - 600 peak amps deliver reliable jump-starts for V6 engines and beyond—never get stranded again.

The Stanley J309 Portable Power Station Jump Starter packs 600 peak amps to jump-start V6 vehicles and smaller, featuring a 7Ah lead-acid battery optimized for cold weather. It includes a reverse polarity alarm for safe connections, a 270° rotating LED work light, and triple USB ports to charge your devices on the go. Compact and portable, it recharges via a standard extension cord and is designed for monthly maintenance charging to ensure readiness whenever you need it.

Specifications

ASIN	B001U04NCA
Amperage	300 Amps
Battery Capacity	7 Amp Hours
Battery Type	Lead Acid
Best Sellers Rank	#232,743 in Automotive ( See Top 100 in Automotive ) #541 in Jump Starters
Brand Name	STANLEY
Compatible with Vehicle Type	Passenger Car
Customer Reviews	4.1 4.1 out of 5 stars (2,779)
EU Spare Part Availability Duration	5 Years
Global Trade Identification Number	00897450002377
Included Components	Power Station
Item Dimensions D x W x H	10"D x 4.5"W x 11"H
Item Type Name	Portable Power Station Jump Starter
Item Weight	8.5 Pounds
Manufacturer	Baccus Global LLC
Manufacturer Part Number	J309
Manufacturer Warranty Description	1 year warranty
Model Number	J309
Peak Output Current	600 Amps
UPC	897450002377
Unit Count	1.0 Count
Voltage	12 Volts

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TrustScore 4.5 | 7,300+ reviews

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210176CFA

Duties & taxes included

In stock

Sold byAmazon SenegalDelivered 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 Senegal.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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2 weeks ago

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