Chapter in this post:
The post has become quite long now and I think many of you are not necessarily keen to read 15 minutes about the functions and properties of hand warmers. For this reason, I have two recommendations for you, with which you are guaranteed not to go wrong and still get a full smartphone and warm fingers in the cold days.
Update, December 16.12.2020, XNUMX: The list here includes some good pocket warmers, but my favorite has been this for a year BigBlue 3-in-1 pocket warmer with USB, power bank and torch. You can find it at the bottom of this post or via this link here on Amazon. The flashlight function makes it super practical when you're looking for something in the dark and when the iPhone gnaws at the last battery reserves - which it likes to do in sub-zero temperatures - then you can keep it afloat with the pocket warmer. Definitely my recommendation!
Update, December 5, 2017: Another year is over and winter 2017/2018 is just around the corner! So that you can get through Christmas and the New Year safely and with warm hands, I have revised the article about the best USB battery pocket warmers for the winter. Below you will find a correspondingly updated overview of the hand warmer with power bank function. All other parts of the text are from the 2014 article and the corresponding updates from 2015 and 2016;)
Update, December 9, 2016: I have read the USB battery pocket warmer thrown from the list that are no longer available on Amazon. For this I have added current models for winter 2016/2017. Of course are too Hand warmer with power bank function included;)
You already know that I'm on lists with the "best" products. They are simply the products in a category that I think are particularly recommendable. The judgment is not based on a comprehensive test, but on the many opinions and reviews from other people that I was able to find on the Internet about the products. This "test" on cordless pocket warmers came about because a colleague and I recently had to do an assignment with the flying drone. It was below 0 ° C and if you then mainly stand for an hour in the wind and have to operate two aluminum control sticks with your fingers, you get really cold fingers and hands.
Since we still have a few outstanding jobs of this kind, it won't be long before I'm back in the field and my fingers freeze off. Accordingly, I've already looked around for ways to get my hands warm again quickly in the short breaks between landings and take-offs. I came up with the idea to put a USB hand warmer in every jacket pocket so that I can warm up both hands at the same time. But which model should you take? One with charcoal pencils, one with lighter fluid or a pocket warmer with a battery?
I ended up going for a rechargeable electric hand warmer. The reasons for this are as follows:
So I looked around a bit for electric USB pocket warmers and actually only found three models that can be recommended. I have to admit that I prefer one model - but I think there are different tastes and that's why I would like to introduce the advantages and disadvantages of all three models. The prices mentioned are given at the current time and will not be updated. So please check how much they actually cost.
Here is the update mentioned above for the pocket warmers, hand warmers and power banks with warming function / heating function that are currently well rated on Amazon. If you know other good pocket warmers, hand warmers and power bank heaters, please write them as a comment under this post!
The purital pocket warmer has average good to very good ratings on Amazon. This applies to all four color variants. Although the model is not the cheapest, you can buy a pocket warmer with the device that heats up to 48 ° C. In addition, the battery can be used as a power bank with a capacity of 5.600 mAh. Ideal for charging your iPhone multiple times;)
The pocket oven from Golfoholic actually won first place: the product award in the "Accessories" category at Golf Europe 2010. With its 45 grams it is again below the CSL warmer, but it still offers a slightly higher temperature of 42-45 ° C. The mileage is specified by the manufacturer as 3-4 hours, but a customer writes that he can heat up more like 4-6 hours with 1-2 hours of charging. Since the weight is roughly the same as that of the CSL pocket warmer, I assume that the battery is in the same league and has around 1000 mAh. Unfortunately, the manufacturer does not provide any information about this. The shape of this warmer is also very pleasant due to the rounded corners. Customer opinions vary a lot, but I think the performance data is roughly the same as that of the CSL warmer, although I am pleased that this one offers a few degrees more.
Ok, I'll admit it: I found my favorite device with the Warmastone USB hand warmer. At 90 grams, it weighs almost twice as much as the devices mentioned above, but it also offers a maximum heating output of 55 ° C, which can be divided into two heating levels using a switch. In addition to the power bank function, it also offers the option of using it as a flashlight and even as a bicycle light thanks to the bicycle holder supplied. A 30-pin plug for the iPhone 4 is included, but if you have an iPhone 5 or 6/6 plus, you should also order a Lightning cable, because you need this if you want to use the Warmastone hand warmer as a power bank for current iPhones . Since the weight of the Warmastone is higher than that of the other two devices, I assume that a more powerful lithium battery is installed. Due to the higher heating output, however, it will certainly also be more stressed. However, a customer still reports a good 2 to 2,5 hours of heat delivery at full power. The multi-level LED display, which shows how long you can still have heat, is also convenient.
And here is an update from December 15, 2016: I am now adding the Big Blue pocket warmer to the list. According to the manufacturer, it warms up from 35 ° to 60 ° Celsius and can also be used as a power bank. I've already had the Big Blue here before in test, which was very positive for the hand warmer. The capacity of the battery is 6.000 mAh and is enough to warm your hands, charge the iPhone and use the built-in LED flashlight. A beautiful multifunctional device that can only be delivered from December 19, 2016. Still, there are already four 5-star ratings, one even with photos of the device. I guess these are reports from pre-testers who have already contributed their impressions of the device before it goes on sale ...
All three devices mentioned have received quite good ratings from Amazon customers. It should also be clear that you should take or order a corresponding charging cable for your smartphone, because the manufacturers cannot add something compatible for all devices.
The power bank function is available on all devices, but the customer reports show that you shouldn't expect too much here. For most cell phones it won't even be enough for half a battery charge and it should also charge much more slowly than on the original power supply units from the smartphone manufacturers. This is due to the lower power output that the hand warmers have.
Some customers also fail to understand that you cannot charge your smartphone and warm your hands at the same time. The reason for this, however, is very simple: If you split the power output of the hand warmers again and allow both functions at the same time, you would have a charger that is slow underground and a hand warmer that only manages 30 ° C. Not a satisfactory result. So you don't really want to have it. :)
My personal favorite is the Warmastone pocket warmer, which on the one hand has more battery power and on the other hand also generates greater heat. Since I can only put my hands in my pockets briefly between flights with the drone, the strong heating effect is particularly important to me. If you don't need that, you might also be happy with the other two models.
Jens has been running the blog since 2012. He appears as Sir Apfelot for his readers and helps them with problems of a technical nature. In his free time he drives electric unicycles, takes photos (preferably with his iPhone, of course), climbs around in the Hessian mountains or hikes with the family. His articles deal with Apple products, news from the world of drones or solutions for current bugs.
The page contains affiliate links / images: Amazon.de