DR.PREPARE K9 Max 16,000 mAh Heated Clothing Power Bank

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Product guide

DR.PREPARE K9 Max 16,000 mAh Heated Clothing Power Bank

Power Bank: DR.PREPARE K9 Max is a 16,000 mAh portable battery pack designed for heated clothing and other devices. Its three outputs include a 7.4 V DC connection for compatible heated gear, alongside USB charging, but the listing gives conflicting dimensions and charging-time expectations that are worth noting.

At a glance

Three outputs cover DC-powered heated gear plus USB-A and USB-C devices.
The listing claims different heated-clothing runtimes by setting, with all heating zones active.
USB-C supports both input and output, with separate listed charging profiles for USB-A and USB-C.

Price

£25.49Save 15%

Reference price: ~~£29.99~~

Price checked: 12 Nov 2026

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Often bought together

DR.PREPARE Womens Heated Gilet, Lightweight Body Warmer with Pink Zipper, | Adjustable Side Zipper & Elstic Side Design for Slim Fit, with 3 Heating Levels, 6 Heating Zones（No With Battery Pack)

£49.99

Pros and cons

Pros

DC output and USB ports make it suitable for buyers wanting one pack for compatible heated clothing and personal electronics.
USB-C input and output provide more connection flexibility than a single-purpose heated-garment battery.
The stated capacity is 16,000 mAh, and the manufacturer lists a compact set of dimensions.

Cons

At 260 g, it may feel weighty for buyers carrying a battery in a clothing pocket.

Technical specifications

22 specifications

Identity
Brand	DR.PREPARE
Model	K9 Max

Power and battery
Capacity	16000 Milliamp Hours
Power configuration	Corded Electric
Battery cell type	Lithium Polymer
Voltage	7.4 Volts
Maximum charging output	18W Max Fast Charging
Battery charge time	5 Hours
Ports	3
Amperage	3 Amps
DC output	7.4V/2.5A
USB-C input	5V/3A, 9V/2A, 12V/1.5A (max.)
USB-A output	5V/3A, 9V/2A, 10V/2.25A, 12V/1.5A (max.)
Battery included	1 Lithium Polymer batteries required. (included)

Compatibility and features
Compatible devices	Heated Vest, Heated Jacket, Heated Eye Mask, Smartphone, Tablet, Desktop Fan
Connector type	USB Type C
Special feature	Fast Charging
Portable	Yes
Cordless	No

Dimensions and installation
Dimensions listed	11.9 x 6.9 x 2.8 centimetres
Weight listed	260 Grams

Manufacturer runtime claims
Heated-gear runtime	7 hours of enduring warmth (4 h on High, 5 h on Medium, 7 h on Low, with all heating zones active)

What to know before buying

Listing details to confirm

Listing details are inconsistent or unconfirmed: dimensions are given as both 11.9 x 6.9 x 2.8 centimetres and 12.9L x 8.8W x 3.5Th centimetres, the stated 5-hour recharge time differs from customer reports of very slow recharging, and customer feedback mentions up to 8 hours on medium while the listing claims 5 hours on medium with all heating zones active. Confirm garment compatibility and relevant runtime expectations before buying.

Who is it for?

A good fit for

People who need a battery pack for heated clothing with a compatible 7.4 V DC connection.
Buyers seeking one portable battery for compatible heated gear and USB-powered phones, tablets or fans.

Less suited to

Buyers prioritising an especially light battery for all-day pocket carry.
Buyers who require a clearly established size or recharge time before purchase.

DR.PREPARE K9 Max 16,000 mAh Heated Clothing Power Bank · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.4 / 5 · 406 ratings

5 stars68%68%
4 stars18%18%
3 stars5%5%
2 stars4%4%
1 star5%5%

Customer feedback describes the pack as reliable and pocket-friendly, with positive reports about warmth and battery life. Opinions on charging speed are mixed, and some feedback calls it heavy. Those points matter if you plan to carry it in clothing or need a predictable recharge schedule. Customer-reported runtimes should be distinguished from the manufacturer's figures, which specify 4 to 7 hours depending on heat setting.

Positive themes

Customers describe it as reliable and small enough to fit in a pocket.
Feedback highlights warmth and battery life.

Negative themes

Some customers describe the power bank as heavy.

Mixed feedback

Charging speed receives mixed feedback, with reports of quick charging as well as very slow recharging.

Frequently asked questions

Can this power bank run heated clothing?

The listing specifies a 7.4 V DC output and names heated vests and jackets as compatible devices. Check that your garment uses a matching connection and power requirement.

What outputs does the K9 Max have?

The product listing describes three outputs: DC, USB-A and USB-C. USB-C is also listed as an input.

How long does it run heated clothing?

The manufacturer claims 4 hours on High, 5 hours on Medium and 7 hours on Low with all heating zones active. Customer feedback also mentions up to 8 hours on Medium, so actual results are not established and the claims differ.

How long does it take to recharge?

The specifications list 5 Hours, while customer feedback is mixed, with some describing quick charging and others reporting a very long recharge. Treat the listed time as a claim rather than a guaranteed result.