How warm do they get?

They have three settings: 40, 50 and 60 degrees Celsius.

Can they charge a phone?

Yes. Each warmer is also a 5,000 mAh power bank, and I charge my phone from one in my video.

Why not just wear thick gloves?

Thick gloves make the small knobs on a telescope hard to adjust. I keep my hands bare, warm them when they start to go numb, and keep one warmer in my breast pocket to keep my chest warm.

Is the pair in the link the pair in my video?

No. The link goes to a different two-pack, listed at 6,000 mAh with three heat levels (the listing does not say whether that is per warmer); the pair in my video are 5,000 mAh each.

What have I not tested on the hand warmers?

I have not timed how long each warmer holds its heat on each setting.

Rechargeable hand warmers review: warm hands at the eyepiece

Where does it rank on our leaderboard

Nine of the 46 accessories on my board, against price
Rank	Accessory	Stars for Your Buck	Recorded UK price
1	GEMINI EAF	100 out of 100	£42
2	Generic Dew Heater	93 out of 100	£9
11	Altair Solar White Light Angle Eyepiece	82 out of 100	£170
14	Rechargeable hand warmers	80 out of 100	£12
17	Red light headlamp	77 out of 100	£6
30	Celestron 0.63x Reducer	62 out of 100	£165
37	ToupTek StellaVita	46 out of 100	£299
45	SKY ROVER 2x54 Binoculars	28 out of 100	£139
46	365 Solar Telescope Cover	5 out of 100	£73

Contents

01 Where does it rank on our leaderboard
02 Specifications and features
03 In use
04 In my words
05 Watch it in my video
06 Should you buy it?
07 Questions and more about this review

In 30 seconds

Stars for Your Buck 80/100

Reviewed 13 Dec 2023 Updated 25 Sep 2026

Rank: #14 of 46 accessories
Verdict: Damon recommends

Written by Damon Scotting 2 min read

Buy it if

You work bare-handed at the telescope on cold nights and your fingers go numb.
You want a spare power bank for your phone in the same pocket.

Skip it if

You are happy observing in thick gloves.
You never stay out long enough for the cold to matter.

“They have three varying temperatures that go from 40 to 50 to 60 degrees Celsius, and best of all, they operate as power banks.”

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Specifications and features

Rechargeable hand warmers reviewed #14 of 46
Recorded UK price	£12
Units	Two
Heat settings	40, 50 and 60 °C
Power bank	5,000 mAh each
Display	Shows the heat setting
Pair in the buy link	Two-pack, 6,000 mAh, three heat levels

In use

Set to 50 °C

The pair

At the telescope

Its charging ports

Charging my phone

Into my breast pocket

In my words

“I myself don't like to use gloves, because I'm constantly fiddling around with tiny little knobs.”

From my nine-accessories video

“I can have my hands exposed for about five to ten minutes, and then they start to go numb and I lose all feeling.”

From my nine-accessories video

“Then I pop these bad boys out, and then I generally get the feeling back in my fingers after a couple of minutes.”

From my nine-accessories video

Watch it in my video

The 9 COOLEST Accessories for ASTRONOMY! · published 13 December 2023 · 17:00 · Watch on YouTube · 19,597 views, 974 likes on 2 Oct 2026

Jump to

11:20 The rechargeable hand warmers
11:28 Three heat settings
11:36 Power banks too
11:43 Why not gloves
12:04 Numb fingers, warm again in minutes
12:14 In the breast pocket

Transcript of the video 266 words · 5 chapters · searchable

Press a time stamp to play from there.

11:28 Three heat settings

11:28 They have three varying temperatures that go from 40 to 50 to 60 degrees Celsius, and best of all, they operate as power banks.

11:36 Power banks too

11:36 They are two separate 5,000 milliamp-hour power banks. 11:40 So not only are they great for keeping on you in order to keep warm when you're outside stargazing: I myself don't like to use gloves, because I'm constantly fiddling around with tiny little knobs.

11:43 Why not gloves

11:52 What an odd thing to say at three in the morning, right? 11:56 Yeah, I just don't like to wear thick gloves, because it means it's a lot harder to adjust everything, so it's helpful to have a set of hand warmers I can just hold my hand every now and then.

12:04 Numb fingers, warm again in minutes

12:04 And honestly, I can have my hands exposed for about five to ten minutes, and then they start to go numb and I lose all feeling. 12:10 Then I pop these bad boys out, and then I generally get the feeling back in my fingers after a couple of minutes.

12:14 In the breast pocket

12:14 I actually keep it placed just inside my breast pocket here, because then it keeps the rest of me nice and toasty, and most importantly the chest area, which I feel like is where you lose a lot of the heat. 12:24 You may be thinking right now: why not just wear a scarf and a pair of thick gloves? 12:24 Well, you do you, and I'll do me. 12:31 So yeah, that's gadget number seven. 12:31 A fairly obvious one, some might think: hand warmers. 12:31 Very cool. 12:31 This is very toasty right now, so I'm going to pop that back inside there.

Should you buy it?

80/100 Stars for Your Buck

Pros

Three heat settings: 40, 50 and 60 °C.
Each warmer is also a 5,000 mAh power bank that can charge a phone.
A pair, so both hands, or a hand and a pocket, stay warm.
Warm hands without thick gloves, so small knobs stay easy to turn.

Cons

They have to be charged before a night out.
Heating and phone charging draw on the same battery.
There are two units to keep charged.

I just don't like to wear thick gloves, because it means it's a lot harder to adjust everything, so it's helpful to have a set of hand warmers.

Three alternatives

Questions and more about this review

Reviewed by

Damon Scotting

The Telescope Man Verified

BSc (Hons) Physics with Astrophysics and Cosmology, Loughborough University PGCE / QTS, University of Nottingham

About Damon About Damon Damon Scotting is The Telescope Man. He holds a BSc (Hons) in Physics with Astrophysics and Cosmology from Loughborough University and a PGCE with QTS from the University of Nottingham, and taught physics in secondary schools before becoming an astronomy creator. He is a contributing writer for BBC Sky at Night Magazine and the author of 42 Wonders of Our Night Sky, and his photograph of the galaxy M100 with the dwarf planet Ceres was Highly Commended in the Astronomy Photographer of the Year 2024 competition run by Royal Observatory Greenwich. He has appeared on the BBC's Blue Peter. More than 750,000 people follow his astronomy channels on YouTube, Instagram and TikTok, and he has reviewed more than 140 telescopes, mounts, cameras, filters and accessories hands-on for this site. More about Damon · How I test · Damon's book

I review all kinds of gear: most of it I buy, some is gifted and some is loaned, and all of it is reviewed the same way. How this site is funded

Five questions, answered

Questions about the Rechargeable hand warmers

Reviewed 13 December 2023 ·Updated 25 September 2026

I review all kinds of gear. Most of it I buy, some is gifted and some is loaned, and all of it is reviewed the same way: no company sees or approves a review before it is published. Shop links marked Ad are affiliate links: I earn a commission when you buy through them, at no extra cost to you. How this site is funded

How warm do they get? They have three settings: 40, 50 and 60 degrees Celsius. Watch it in my video ↓
Can they charge a phone? Yes. Each warmer is also a 5,000 mAh power bank, and I charge my phone from one in my video. In use ↓
Why not just wear thick gloves? Thick gloves make the small knobs on a telescope hard to adjust. I keep my hands bare, warm them when they start to go numb, and keep one warmer in my breast pocket to keep my chest warm. Watch it in my video ↓
Is the pair in the link the pair in my video? No. The link goes to a different two-pack, listed at 6,000 mAh with three heat levels (the listing does not say whether that is per warmer); the pair in my video are 5,000 mAh each. The verdict, the readers and the sellers ↓
What have I not tested on the hand warmers? I have not timed how long each warmer holds its heat on each setting.