Veauney YJ-781B 20,000mAh 7.4V Heated-Clothing Battery Pack

Heated-Clothing: The Veauney YJ-781B is a rechargeable battery pack for compatible 7.4V heated clothing, with USB outputs for charging small devices. The listing claims up to 15 hours of vest runtime on low, but compatibility depends on voltage and connector fit.

At a glance

Designed for 7.4V heated apparel. The listing names Ororo and 7.4V Venustas among compatible examples and excludes 12V garments.
Includes two DC adapter cables intended for 3.5mm and 3.8mm clothing ports, alongside a stated 4.0mm connection option.
Manufacturer claims runtime of 7 hours on high, 10 on medium and 15 on low.
USB outputs are also claimed to charge a smartphone, with the listing estimating two charges per full battery.
Automatic start when connected to heated clothing is a manufacturer claim.

Price

$28.79Save 10%

Reference price: ~~$31.99~~

Price checked: Nov 13, 2026

View offer Ahead of Black FridayExplore the selection

Pros and cons

Pros

The stated 20,000mAh capacity and three heat-setting runtime estimates offer a useful reference for planning heated-clothing use.
The listed USB outputs provide a secondary charging function beyond the 7.4V DC output.
Two DC adapter cables are claimed for use with different clothing connector sizes.

Cons

Customer feedback includes complaints that the battery feels heavy, which may matter when worn with a vest.

Technical specifications

16 specifications

Identity
Brand	Veauney
Model	YJ-781B
Color	Black

Power and battery
Power configuration	Corded Electric
Battery capacity	20000 milliamp_hours
Battery voltage	7.4 volts
Battery cell type	Lithium Polymer
Battery	1 Lithium Polymer batteries required. (included)
Rechargeability	Rechargeable
Weight	262 g

Outputs and connections
USB connector	USB Type C
Number of ports	3
Output ports	7.4V/2.1A DC, 5V/3A 9V/2A 12V/1.5A USB, 5V/3A 9V/2.22A 12V/1.5A, USB-C

Dimensions and installation
Dimensions listed	1 x 1 x 1 inches

Compatibility and claimed use
Compatible devices	Smartphone
Claimed heated-clothing runtime	7-15 Hours(7 hours at high temperature, 10 hours at medium temperature, and 15 hours at low temperature)

What to know before buying

Listing details to confirm

The listing is inconsistent about the connector layout: the title and feature text describe USB and 7.4V DC outputs, while the details specify three ports and the product description lists multiple USB voltage profiles. It also gives unusually small dimensions of 1 x 1 x 1 inches, while customer feedback reports mixed connector compatibility and one report of an oversized round plug. Confirm the actual port arrangement, adapter fit and garment voltage before purchase. Runtime, smartphone charging and automatic start are manufacturer claims, not independently established performance.

Who is it for?

A good fit for

Owners of compatible 7.4V heated clothing who need a replacement or backup battery.
Buyers who want a heated-apparel battery that also claims USB device-charging outputs.
Users whose garment connector matches the included adapters or stated port options.

Less suited to

Owners of 12V heated clothing, including 12V Venustas garments.
Buyers who need a lightweight battery, given customer reports that it feels heavy.
Anyone who cannot confirm that the battery's connector and voltage match their garment.

Veauney YJ-781B 20,000mAh 7.4V Heated-Clothing Battery Pack · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.3 / 5 · 161 ratings

5 stars72%72%
4 stars10%10%
3 stars4%4%
2 stars4%4%
1 star10%10%

Customer feedback highlights perceived long battery life and good value, while heat output and compatibility receive mixed reports. Some report warmer clothing, while others say the battery worked for only two uses, and one notes the round connector was too large. The weight is also criticized. These experiences make connector fit and comfort important checks alongside the listed 7.4V compatibility and claimed heat-setting runtimes.

Positive themes

Customers describe battery life as long-lasting.
Customers mention good value for money.

Negative themes

Customers describe the battery as heavy.

Mixed feedback

Feedback on heat output varies, including reports of warmth and a report of only two uses.
Compatibility feedback is mixed, including a report that the round connector is too large.

Frequently asked questions

Will this work with a 12V heated vest?

The listing specifies a 7.4V battery and explicitly says it is not suitable for 12V heated clothing.

How long does the battery last in heated clothing?

The manufacturer claims 7 hours on high, 10 hours on medium and 15 hours on low. Actual runtime is not independently verified.

Which clothing connectors are supported?

The listing describes 4.0mm DC compatibility and two adapters for 3.5mm and 3.8mm ports. Check the garment's voltage and connector dimensions, as customer feedback reports mixed fit.

Can it charge a phone?

The listing says it can charge a smartphone and estimates two charges per full battery. That claim is not independently verified.