Muvenes RTAX-021X 7.4V 20000mAh Heated Vest Battery Pack

Muvenes RTAX-021X is a rechargeable battery pack listed for 7.4V heated clothing and compatible with several named heated-vest brands. Its claimed 20,000mAh capacity, LED charge display and built-in USB-C cable may suit buyers who also want to charge portable devices.

At a glance

An LED display is claimed to show remaining charge from 1% to 100%.
The listing describes USB, Type-C and DC ports, plus a built-in bidirectional USB-C cable.
The seller claims up to 12 hours of heating, with runtime dependent on use conditions not specified here.
The listing names ORORO, TODWARM, Weamest and XINSONYUELL compatibility.

Price

$28.04Save 15%

Reference price: ~~$32.99~~

Price checked: Nov 14, 2026

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Often bought together

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

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ORORO Women's Heated Softshell Vest with Battery, Water and Wind Resistant | Lightweight stretch softshell, 4 heating zones, walking, travel, hiking and everyday outdoor wear

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Pros and cons

Pros

The claimed display gives a percentage reading of remaining charge rather than only a basic indicator.
The listed USB and DC connections support heated clothing and portable-device charging.
Two different DC adapters are listed in the package description for varied connector sizing.

Cons

At 10.4 ounces, the stated battery weight is a consideration for buyers prioritizing a light vest setup.

Technical specifications

9 specifications

Identity
Brand	Muvenes
Model	RTAX-021X

Power and battery
Battery capacity	20000 milliamp_hours
Voltage	7.4 volts
Battery type	Lithium Polymer
Rechargeable	Rechargeable
Battery weight	10.4 ounces

Design and compatibility
Color	Black
Listed compatible devices	DC Port Heating Jacket, DC Port Heating Vest, iPhone

What to know before buying

Listing details to confirm

The listing describes compatibility with several brands but does not specify connector fit for every garment. Confirm your vest's voltage and connector before ordering. Its up-to-12-hour heating runtime is a seller claim, not a stated result for a particular heat setting. The details also list one included 9V battery, which is inconsistent with the rechargeable 7.4V pack description. The advertised one-year manufacturer warranty is not otherwise detailed.

Who is it for?

A good fit for

Owners of compatible 7.4V heated vests or jackets seeking a rechargeable replacement pack.
Outdoor users who value an on-pack charge percentage display and USB charging options.
Buyers whose device connector matches one of the listed DC adapter sizes.

Less suited to

Anyone who needs confirmed fit for an unlisted heated-clothing brand or connector.
Buyers seeking a particularly light battery, given the listed 10.4-ounce weight.

Muvenes RTAX-021X 7.4V 20000mAh Heated Vest Battery Pack · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.6 / 5 · 111 ratings

5 stars81%81%
4 stars10%10%
3 stars3%3%
2 stars1%1%
1 star5%5%

Customer feedback reports strong battery life and useful operation, including accounts of running an ORORO vest for a day and charging a phone multiple times. These are customer-reported experiences, not a guarantee of the listing's claimed runtime. Feedback also mentions that the pack feels heavy, which matters for a vest pocket. The overall rating distribution is mostly five-star but includes a smaller range of lower ratings, and does not establish why people rated it that way.

Positive themes

Customer feedback highlights battery life, functionality and power delivery, with reported use in heated vests and phone charging.

Mixed feedback

Customers reportedly appreciate the battery life but also describe the pack as heavy.

Frequently asked questions

Will this battery fit my heated vest?

The listing names ORORO, TODWARM, Weamest and XINSONYUELL, but compatibility depends on the garment's voltage and connector. Check those details against the pack and included adapters.

How long is the claimed heating runtime?

The listing claims up to 12 hours of continuous heating. It does not give a heat setting or other conditions for that figure, so actual runtime may vary.

Can it charge a phone?

The listing describes USB and Type-C ports and says it supports smartphones. Check the connection and charging requirements of your device.