Zippo HeatBank 9s Review (2026): Pocket Warmer, Power Bank

Disposable hand warmers are cheap and convenient, but they are single-use. This Zippo HeatBank 9s rechargeable hand warmer review looks at a reusable alternative that also works as an emergency power bank for your phone. It is aimed at people who want adjustable warmth in a coat pocket and a bit of backup charging, rather than the hottest or slimmest warmer around. It is based on the manufacturer's specs and what independent experts report, not on our own hands-on testing.

What the Zippo HeatBank 9s is

The HeatBank 9s is a rechargeable, two-sided hand warmer with a built-in lithium-ion battery. You charge it over micro-USB, switch it on, and pick one of six heat settings. Unlike a disposable pouch, you can stop and start it, change the intensity as conditions change, and use it again the next day.

The second job is power-bank duty. A 5200 mAh battery sits inside, and a USB output lets it charge USB-compatible phones, tablets and cameras. That makes it a two-in-one for anyone who spends time outdoors or commuting in the cold and doesn't want to carry two separate gadgets.

It sits in the mid-range price tier.

Design and build

The body is curved and ergonomic, shaped to sit in the hand and slide into a pocket. The dimensions are 4.88" high, 2.38" wide and 0.95" deep, and it weighs 5.52 oz. That is small enough for a coat or jacket pocket, though the thickness matters, as the next point explains.

A common criticism from reviewers is that it is too bulky to fit comfortably inside gloves or mitts. If you picture a thin warmer tucked against your palm inside a glove, this is not that product. It is designed to be held, or kept in a pocket that you slip your hand into. Think of it as a pocket warmer first.

It ships with a lanyard and a USB charging cable. Zippo backs it with a 1-year warranty.

Features and what they mean day to day

Six heat settings, single- or dual-sided

The headline feature is flexibility. There are 6 heat settings in total: 3 single-sided and 3 dual-sided. Single-sided heating directs warmth to one face of the unit, while dual-sided heats both. Each mode has three heat settings, so you can match the warmth to the conditions or keep warmth to one side when that is all you need.

The maximum operating temperature is 120°F / 50°C. That is warm enough to be useful in the cold, but, as covered below, reviewers describe the peak heat as modest.

Indicator lights

Battery and heat indicator lights show the current heat setting and the charge remaining. For a device you rely on in cold weather, that matters: you can check at a glance how much is left, which is useful when you are also counting on the battery to top up a phone.

Built-in power bank

The 5200 mAh battery doubles as a charger for USB-compatible phones, tablets and cameras via a 5V2A USB output. As a rule of thumb, a capacity in this range is aimed at emergency top-ups rather than replacing a dedicated high-capacity power bank, so treat it as a bonus.

One limitation is worth knowing before you buy: the heater doesn't run while the HeatBank is charging another device. You choose between warming your hands and charging your phone at any given moment. Reviewers flag this as a drawback, and it affects how you plan a cold day out.

Reusable by design

Because you recharge it rather than throw it away, there is less waste than with disposable warmers. For anyone who gets through packs of disposables every winter, that is a practical and environmental argument.

Zippo HeatBank 9s performance, battery and charging

Heat-up and warmth

Reviewers praise how quickly it heats up, noting it gets warm within seconds. Once it is going, you can step through the settings to find a level that suits you.

The flip side is peak output. A common criticism is that the peak heat is modest compared with other rechargeable warmers. If you are looking for the most intense heat for very cold conditions, that is the main caveat. The HeatBank 9s makes more sense as a source of steady, adjustable warmth than as a high-output heater.

Run time

Zippo quotes up to 9 hours of run time on one charge, and that is the figure reviewers like. They also note, however, that run time at higher settings falls short of that claim. This is normal for heated devices: the longest times come from the lowest heat. If you plan to run it hot all day, expect to recharge sooner than the headline suggests. If you use the lower settings, you are in a better position to approach the quoted figure.

Charging

The input is a 5V2A micro-USB port, and the output is a 5V2A USB port. A USB cable is included. Micro-USB is an older connector than USB-C, so check that the cable you carry matches if you want to charge it on the go. The included cable solves the problem for home use.

What experts like and what they criticise

Feedback from independent reviewers is consistent. Reviewers praise:

• the choice of six heat settings, including single- or dual-sided heating
• how quickly it heats up
• the up to 9 hours of run time per charge
• the built-in 5200 mAh power bank for phones and tablets
• the curved, ergonomic body that suits the hand and pocket, and its reusability

A common criticism is that:

• peak heat is modest compared with other rechargeable warmers
• run time at higher settings falls short of the 9-hour claim
• it is too bulky to fit comfortably in gloves or mitts
• the heater doesn't run while it is charging another device

On scores, The Great Outdoors rates it 4 out of 5. We do not have enough published scores to give a combined average, so that is the one published figure to go on.

Who should buy it, and who should skip it

It suits you if you want a reusable warmer for coat-pocket use, like adjustable heat rather than a fixed output, and appreciate having an emergency phone charger in the same unit. It also suits people who are tired of disposable packs and want something they can top up and use again. Think pocket users who want adjustable heat plus emergency phone charging.

Skip it if you want the maximum heat available, if you expect to run it on high for a full day, or if you want a slim warmer that fits inside gloves or mitts. Also skip it if you hoped to warm your hands and charge a phone at the same moment, since the heater doesn't run while it charges another device.

How it fits in its category

Rechargeable hand warmers vary in heat output, run time, size and whether they double as power banks. The HeatBank 9s leans toward versatility: adjustable settings, a power-bank function and a reusable build, with modest peak warmth and a chunkier body as the trade-offs. To see how the range compares as a whole, read our guide to the best rechargeable hand warmers.

Verdict: is the Zippo HeatBank 9s worth it?

The Zippo HeatBank 9s is a sensible choice if your priority is flexible, reusable warmth in a pocket plus a backup charger for your phone. Fast heat-up, six settings and a 5200 mAh battery are real strengths. Modest peak heat, shorter run time at higher settings, a size that doesn't suit gloves and a heater that pauses while charging another device are real limits too. Match those to how you plan to use it, and you will know whether it belongs in your pocket this winter.

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