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HIMONI YJ-781C 7.4V 20,000mAh Heated Vest Battery Pack1 / 7
Product guide

HIMONI YJ-781C 7.4V 20,000mAh Heated Vest Battery Pack

The HIMONI YJ-781C is a rechargeable battery pack listed for compatible heated apparel and USB-powered devices. Its digital display and adapter leads aim to serve several heated-vest connections, but buyers should match the required voltage and connector before ordering.

At a glance

  • Digital display is described as showing remaining power from 1% to 100%.
  • Listing claims compatibility with many 7.4V heated vests and USB 5V heated clothing, including ORORO and Venustas.
  • Two DC adapter leads are described for 3.5mm and 3.8mm connections.
  • USB and USB-C charging ports are described for phone charging.
  • Not for DC 12V output.
Price
$31.99Save 20%

Reference price: $39.99

Price checked: Nov 13, 2026

View offer

Pros and cons

Pros

  • Display makes the remaining charge visible without relying on an estimate.
  • Two adapter leads may help connect supported heated apparel with different DC plug sizes.
  • The listing describes USB and USB-C ports alongside heated-apparel power options.

Technical specifications

15 specifications
Identity
BrandHIMONI
ModelYJ-781C
Power and battery
Power configurationCorded Electric
Voltage7.4 volts
Capacity20000 milliamp_hours
Cell typeLithium Polymer
Battery quantity1 Lithium Polymer batteries required. (included)
Ports3
Connector typeUSB Type C
Compatibility and features
Listed compatible devicesHeated Vest, Smartphone
Special featuresAuto Shut-Off, Digital Display
ColorBlack
Dimensions and installation
Dimensions listed4 x 2.7 x 1 inches
Weight316.31 g
Other details
Warranty description3 MONTHS

What to know before buying

Listing details to confirm

The listing gives different weight figures: 316.31 g in the details and 9.8 ounces in feature text. It also gives differing adapter descriptions, including 3.5mm/3.8mm and 4.0mm-to-3.5mm/3.8mm, and describes output as DC 7.4V and USB 5V without fully mapping these to the three ports. The claimed up-to-12-hour heating time has no stated operating conditions. Confirm your garment's voltage, connector and required output before purchase, and treat the airline-compliance statement as an unconfirmed listing claim.

Who is it for?

A good fit for

  • Owners of compatible 7.4V heated vests seeking a replacement or spare battery.
  • Users of USB 5V heated apparel who can confirm the connector and power requirements match.
  • Buyers who want a visible charge indicator and listed USB phone-charging connections.

Less suited to

  • Devices requiring DC 12V output.
  • Buyers unable to confirm their heated garment's voltage and plug size.
HIMONI YJ-781C 7.4V 20,000mAh Heated Vest Battery Pack · photo 2
Additional product photo 2

Customer reviews on Amazon

4.3 / 5 · 103 ratings
  • 5 stars69%69%
  • 4 stars15%15%
  • 3 stars4%4%
  • 2 stars4%4%
  • 1 star8%8%

Customer feedback highlights battery life and perceived quality, including a report of four hours of vest use and a comparison favoring it over an original battery. Weight opinions are mixed. These reports may help set expectations, but do not establish runtime across settings. The listing's separate claim of up to 12 hours has no stated operating conditions.

Positive themes

  • Customers report favorable battery-life experiences.
  • Some customers express satisfaction with build or perceived quality.

Mixed feedback

  • Weight feedback is divided, with some finding it light and others considering it heavier.

Frequently asked questions

Does the YJ-781C work with DC 12V heated clothing?

No. The listing explicitly says it is not for DC 12V output. Check your garment's required voltage before use.

Which heated apparel does the listing say it supports?

It claims compatibility with many 7.4V heated vests and USB 5V heated clothing, and names ORORO and Venustas. Actual fit depends on the garment's voltage and connector.

How long can it power a heated vest?

The listing claims up to 12 hours, but does not state the heating setting or other conditions. Customer feedback also includes one report of four hours, so runtime may vary.

What adapters are included?

The feature text describes two DC adapters, but its connector-size wording is inconsistent. Verify the selected listing and connector requirements before relying on a specific adapter.

HIMONI YJ-781C 7.4V 20,000mAh Heated Vest Battery Pack · photo 3
Additional product photo 3

Alternative options

Product details in Markdown