# Glaais YJ-781B 20,000mAh Heated Vest Battery Pack

Vest: Glaais YJ-781B is a rechargeable battery pack for compatible heated apparel, with a stated 20,000mAh capacity, DC and USB outputs, and a digital display. The listing gives different runtime figures across sections, so treat them as estimates tied to clothing power draw and heat setting.

- [Original product page](https://best-deals.pro/product/glaais-yj-781b-heated-vest-battery-pack)
- [View offer](https://best-deals.pro/visit/glaais-yj-781b-heated-vest-battery-pack)
- Market: US
- Language: en-US
- Currency: USD
- Brand: Glaais
- Model: YJ-781B
- Category: Electronics > Electronics Accessories > Batteries
- Price: 28.99 USD
- Previous price: 32.99 USD
- Discount: 12%
- Price checked: 2026-11-13T05:31:13.310Z
- Rating: 4.4 / 5
- Reviews: 175

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Listing describes DC 7.4V and USB 5V outputs for heated apparel, and excludes 12V heated devices.
- Battery runtime is claimed as 5–7 hours on high, 7–11 hours on medium, and 11–16 hours on low in one section. Another gives 7–10 hours on medium.
- A digital display is described as showing remaining power from 1% to 100%.
- The claimed package includes two DC adapters for several plug sizes, plus a USB-A to USB-C charging cable.

## Pros

- The stated capacity and multiple output types make the pack applicable to supported 7.4V and 5V heated clothing.
- A digital battery-level display gives a visible charge estimate.
- The listing describes adapters for 3.5mm and 3.8mm plugs, alongside a 4.0mm DC port.

## Cons

- Compatibility is voltage- and connector-dependent, so this is not a universal replacement for heated-apparel batteries.

## Specifications

### Identity
- Brand: Glaais
- Model: YJ-781B
- Color: Black
### Power and battery
- Capacity: 20000 milliamp\_hours
- Power configuration: DC
- Battery cell type: Lithium Polymer
- Rechargeability: Rechargeable
- Ports listed: 3
- Output current: 3 A
- Connector type: USB Type C
### Dimensions and installation
- Dimensions listed: 0.1 x 0.1 x 0.1 inches
- Weight listed: 280 g
### Features and use
- Display: Digital Display
- Compatible device listed: Smartphone

## Before you buy

- Listing details are inconsistent or unconfirmed: it gives 7.4V and 5V in the title and apparel description, while the capacity is also described at 3.85V and the technical voltage field is malformed. Runtime claims vary between 7–11 and 7–10 hours on medium, and listed port-count details do not clearly reconcile with the described output connections. Confirm your garment's voltage and connector size, runtime expectations, and the selected package contents before buying. The maker also says runtime varies with garment wattage and temperature setting and excludes 12V heated devices.

## A good fit for

- Owners of compatible 7.4V or 5V heated vests, jackets, or pants who want a replacement or spare battery.
- Buyers whose heated apparel uses a listed 3.5mm, 3.8mm, or 4.0mm DC connection, after confirming the required plug.

## Less suited to

- Owners of 12V heated apparel or garments with an incompatible connector.
- Buyers who need a verified runtime guarantee or precise dimensions, since the listing's runtime and dimension information is inconsistent or implausible.

## Customer feedback

Customer feedback highlights perceived battery life, charging speed, quality, and value. One customer report cited about 12 hours on medium, which is within the listing's stated range, but the product page itself gives two different medium-runtime ranges. These reports may help set expectations, but they do not establish performance for a particular garment or confirm compatibility.
- Positive themes: Customers are reported to appreciate battery life and charging speed.
- Positive themes: The feedback summary describes customers as finding the pack good value and longer-lasting than an OEM unit.

## Frequently asked questions

### Which heated clothing can this battery power?
The listing claims compatibility with many 7.4V and 5V heated garments, including certain ORORO models, and says it does not work with 12V heated devices. Confirm your garment's voltage and connector before purchase.
### How long is the claimed runtime?
The listing states 5–7 hours on high and 11–16 hours on low. Medium is listed as both 7–11 hours and 7–10 hours in different sections. Actual use is said to vary with garment wattage and temperature setting.
### What connectors and adapters are described?
The pack is described with a 4.0mm DC port and two adapters for 3.5mm and 3.8mm plugs. The listing also names USB Type C. Check the selected listing and your garment's connector.
### Does it include a charging cable?
The claimed package list names a USB-A to USB-C charging cable, an instruction manual, and two DC adapters. Verify contents in the selected listing.

## Alternative options

- [ZKN Women's Heated Vest, 4-Zone Heated Jackets with 14400mAh Battery Pack \| Windproof design with 3 heating levels, machine washable for daily use and outdoor warmth](https://best-deals.pro/visit/glaais-yj-781b-heated-vest-battery-pack)
- [7.4V 5V 16000mAh Heated Vest Battery Pack, Battery Pack for Heated Vest Compatible ...](https://best-deals.pro/visit/glaais-yj-781b-heated-vest-battery-pack)
- [ororo Men's Heated Softshell Vest, Water Resistant Outdoor Vest \| Lightweight stretch softshell, 4-zone warmth for pockets and back, lightweight layer for commute and outdoors](https://best-deals.pro/visit/glaais-yj-781b-heated-vest-battery-pack)
- [ororo Men's Heated Vest Lightweight 4-Zone Battery Puffer Vest \| Classic puffer design with insulated comfort, water- and wind-resistant shell for commuting and everyday winter wear](https://best-deals.pro/visit/glaais-yj-781b-heated-vest-battery-pack)
- [ororo Men's Quilted Heated Vest, Lightweight Heated Vest with Battery \| Diamond-quilted design, 4-zone heating, up to 10 hours of warmth for commuting and everyday winter wear](https://best-deals.pro/visit/glaais-yj-781b-heated-vest-battery-pack)
- [ORORO Women’s Heated Fleece Vest, Lightweight 4-Zone Heating Layer Vest \| Soft fleece heated vest, with collar heating, battery included, for everyday warmth and daily wear](https://best-deals.pro/visit/glaais-yj-781b-heated-vest-battery-pack)
- [20000mAh 7.4V 5V Heated Vest Jacket Battery Pack Suit for ORORO,Venustas Rechargeab...](https://best-deals.pro/visit/glaais-yj-781b-heated-vest-battery-pack)
- [10000mah 7.4V Battery Pack for Heated Vests Jackets Suit for ORORO and Venustas, 5V...](https://best-deals.pro/visit/glaais-yj-781b-heated-vest-battery-pack)
- [2PCS 5V 2A 3A 10000mAh Heated Vest/Jacket/Chair/Seat Battery Pack \| For DR.Prepare/...](https://best-deals.pro/visit/glaais-yj-781b-heated-vest-battery-pack)
- [charmast Portable Charger Built-in Cables, 20000mAh Power Bank 6-Output \| Travel Fast Charging Battery Pack for iPhone 17/16/15 Samsung Android, Flight-Approved, Multi-Device, USB-C & USB-A, LED %](https://best-deals.pro/visit/glaais-yj-781b-heated-vest-battery-pack)
- [2-Pack 10000mAh Heated Vest Battery Pack 5V/2A Portable Charger \| Fits for Dr.Prepa...](https://best-deals.pro/visit/glaais-yj-781b-heated-vest-battery-pack)
- [podoru for MagSafe Power Bank 10000 mAh, Foldable Magnetic Portable Charger \| 22.5W PD Fast Charging, with USB-C Cable LED Display, Wireless Battery Pack for iPhone 18/17/16/15/14/13/12 Series-Black](https://best-deals.pro/visit/glaais-yj-781b-heated-vest-battery-pack)

## Add-ons

- [ororo Men’s Heated Fleece Vest, Lightweight 4-Zone Heating Layer Vest \| Lightweight Fleece Heated Vest with Collar Heating, Battery Included](https://best-deals.pro/visit/glaais-yj-781b-heated-vest-battery-pack)

## Images

![Glaais YJ-781B 20,000mAh Heated Vest Battery Pack — 1](https://best-deals.pro/i/x_E0ioupRL29YpAsEoSzJDWM5aWdcsjNNiLaNdgEC30rCcgMksCU3g-AsRSSZN6Oapt1ZkQzD8RlDfOmECU44WaMIKO6R4Cl3klH5ddRP8BkFLruS4JPCZqx.jpg)

![Glaais YJ-781B 20,000mAh Heated Vest Battery Pack — 2](https://best-deals.pro/i/dpjLcnPTTBl2I2Me4PU4HxMdC16vug71TnUF3_me1Og1_wttHUro03iJn1GIR1ckBd0hP1XpFwSy51IapQk24OQq9Rq-Tv-FOZjOSKWvgJJ-h1u14cGq1GnX.jpg)

![Glaais YJ-781B 20,000mAh Heated Vest Battery Pack — 3](https://best-deals.pro/i/WtSQYDc1xvekI29IPG7_9ZvpHqBhwefLFQh7aAPFcMPraEwAUaN55gTPZCLDf4aLE96quW89wrmrIR_GlGEZx19CLYaqK6LhDnzzap5aGJKg4XuiHGMBf9vP.jpg)

![Glaais YJ-781B 20,000mAh Heated Vest Battery Pack — 4](https://best-deals.pro/i/GIkN2a0c5u78cFffNJFuiunPSrKzIrOSaEuBMNHZZFUfVdpqVXHfnPhDPRbT3ePOREhjRelk6tp4QLxGcxG4FCPs16607ykg1pPSGQdGJh3v7ukigVFrsNPH.jpg)

![Glaais YJ-781B 20,000mAh Heated Vest Battery Pack — 5](https://best-deals.pro/i/W4o2VioiCBgTJYzMjpPh0udX86-3xwf3fS-synExpTn5B6SixhD0XlPBKX1NmilvwDhoZPROAIPuaR5B5xrojoL0_9gR6hHM3OLjZTR6kO3uwXLj3KOK9uFS.jpg)

![Glaais YJ-781B 20,000mAh Heated Vest Battery Pack — 6](https://best-deals.pro/i/YOejRiIPRacbuE62F__hTmitUiSAhGtBKgxPvmfjczRdOx_5WnoGu_5B6NXzxUUUYgu1zHcVqbHIhGavdiMwm11AbBnozE5WZtjQwsEETuHGOvgprfdI7t1b.jpg)

![Glaais YJ-781B 20,000mAh Heated Vest Battery Pack — 7](https://best-deals.pro/i/86llN93AzrCayIP3w4hC-sguCFewazKJF3YbNXqIkjy7NgVQiHKvETcvqFqVQGr0brHdiRUpRoVnl7zF4u-atknqCitOQ0m2vME1ipeSPLFm0nun1W6EU7D1.jpg)