2025 test16 productsBatteries & Power Banks
Which Rechargeable Hand Warmers Brand Wins?
We compared 16 rechargeable hand warmers options head to head. DeeKom came out on top. See the measured results, the runner-up, the budget pick, and a link to the full test video.
Winner
DeeKom
Price shown in test: $26
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Runner-up
Funaudio and UNIHAND (tied for second)
Price shown in test: $30
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The measured results
Every number below is read straight from the test. Scroll sideways to see all measurements. Products are listed in the order they finished.
| Product | Low High Heat | Aluminum Block To 120 F | Battery Run Time High Heat | Charge Time | Battery Output | Wind Bacon Test | Peak Temp |
|---|---|---|---|---|---|---|---|
| 1DeeKom$26 | low about 105 F, high 149.8 F (third highest peak initial heat behind COTOP and Kesguar) | 3:21 to 100F, 4:58 to 110F, finished at 7:03 (fastest start of all brands, but final ranking top three were Kesguar 6:31, Uni Hand 6:46, Hot Dot 6:56) | 3 hours 55 minutes, the longest runtime of all 16 brands | 4 hours 15 minutes, tied with AaoLin and UNIHAND | peak 57.89 watts (second highest current behind Funaudio's 61.72 watts), 10.59 watt hours drained capacity | not tested | not tested |
| 2Funaudio$30 | low 109 F, high 148.3 F | 3:27 to 100F, 5:11 to 110F, finished third place at 7:20 behind DeeKom | 2 hours 46 minutes | 6 hours 17 minutes, the longest charge time of all brands | peak 61.72 watts, the highest current of all brands, 10.71 watt hours drained capacity, third best capacity behind Mstoekn and AaoLin | not tested | not tested |
| 3UNIHAND$30 (on sale for $23 per the video description) | low almost 116 F, high 144 F | 3:16 to 100F, 4:50 to 110F (fastest to 110F at that point), finished second place overall at 6:46 | 2 hours 32 minutes | 4 hours 15 minutes, tied with AaoLin and DeeKom | peak 52.49 watts, 10.51 watt hours drained capacity | not tested | not tested |
| 4Kesguar$60 (base station with 10,000 mAh charging capacity) | low 123.3 F, high 157.8 F, second highest peak initial heat behind COTOP | fastest start of all brands at 3:08 to 100F, held the lead at 4:40 to 110F, finished first place overall at 6:31 | 1 hour 52 minutes, tied with COTOP | 3 hours 25 minutes, tied with COTOP | peak 52.57 watts, 6.42 watt hours drained capacity | 112.7 F after 35 minutes wrapped in bacon outdoors in windy 40 degree weather, a strong performer | not tested |
| 5COTOP$59 | low 112.1 F, high 160.6 F, the highest peak initial heat of all 16 brands | results tossed out as unfair; has two heating elements and the bottom element cycled off before the top could heat properly, even after using a cold pack trick to force both elements on, presenter could not get a reliable reading and stopped near 10 minutes | 1 hour 52 minutes, tied with Kesguar | 3 hours 25 minutes, tied with Kesguar | peak 53.88 watts, 6.55 watt hours drained capacity | not tested | not tested |
| 6Mstoekn$26 | low 110 F, high 137.1 F | first attempt was slow due to a rounded surface reducing heat sink contact (5:30 to 100F, 9:04 to 110F, finished 14:39); retested with the heat sink placed directly over the hottest part and improved to 3:49 to 100F, 6:30 to 110F, finished 10:54 | 2 hours 18 minutes | 3 hours 5 minutes, tied with Hotdot and OCOOPA | highest maximum charge rate of all 16 brands at 6.81 watts; peak discharge 55.69 watts, third highest; battery capacity by far the highest of all brands at 13.92 watt hours using a 21700 cell rated for 4,000 mAh | not tested | not tested |
| 7AaoLin$25 | low 111.22 F, high 143.1 F | 3:54 to 100F, 5:51 to 110F, finished 8:22, about a minute and a half slower than Hotdot | 2 hours 27 minutes | 4 hours 15 minutes, tied with DeeKom and UNIHAND | peak 47.61 watts, 10.74 watt hours drained capacity, second best capacity behind Mstoekn | 112.1 F after 35 minutes wrapped in bacon outdoors in windy 40 degree weather | not tested |
| 8Hotdot$25 | low 100.7 F (the coolest on low heat at that point in testing), high 128.7 F (relatively cool on high heat) | fastest of the first several brands tested: 3:15 to 100F, 4:53 to 110F, finished third place overall at 6:56 | 2 hours 8 minutes | 3 hours 5 minutes, tied with Mstoekn and OCOOPA | peak 37.86 watts, second highest current at that point in testing; 7.31 watt hours drained capacity, just under its 3,200 mAh rating | 113.2 F after 35 minutes wrapped in bacon outdoors in windy 40 degree weather, by far the best of the brands mentioned at that point | not tested |
| 9OCOOPA Card$27 | low 112.2 F, high 133.3 F | 3:28 to 100F, 5:18 to 110F (faster than average), finished fifth place at 7:39 | 2 hours 58 minutes | 3 hours 12 minutes | peak 52.65 watts, 8.52 watt hours drained capacity, described as better than average | not tested | not tested |
| 10OCOOPA$30 | low 112.9 F (about the same as OCOOPA Card), high 131.6 F (not quite as hot as OCOOPA Card) | 3:23 to 100F, 5:11 to 110F, finished 7:26 | 2 hours 9 minutes | 3 hours 5 minutes, tied with Hotdot and Mstoekn | peak 54.9 watts, about the same as OCOOPA Card; 8.5 watt hours drained capacity, about the same as OCOOPA Card | not tested | not tested |
| 11JIJ$32 | low almost 124 F (the hottest on low heat of all brands at that point), high almost 139 F | slow start, 4:12 to 100F, 6:58 to 110F, finished 11:17, one of the slower performers considering the price | 3 hours 15 minutes, second longest runtime of all brands behind DeeKom (referred to in the transcript by the mistranscribed name GI) | 5 hours 1 minute, second longest charge time of all brands behind Funaudio | not tested | not tested | not tested |
| 12Okayice$20 | low 123.3 F (hottest on low heat at that point in testing), high 135.1 F (coolest on high heat at that point) | off to a really slow start, 5:15 to 100F, 8:55 to 110F, finished 15:57, more than twice as long as the first three brands tested | 2 hours 7 minutes | 3 hours 8 minutes | peak 33.63 watts, 6.98 watt hours drained capacity, 1 watt hour less than KQPZ | 80.9 F after 35 minutes wrapped in bacon outdoors in windy 40 degree weather, described as really struggling | not tested |
| 13Gaiatop$20 | low 122.5 F, high 141.7 F | 3:27 to 100F (trailing KQPZ by 1 second), falling a little behind at 5:15 to 110F, but moved into the lead over KQPZ at 7:24 to finish | 1 hour 25 minutes, second shortest runtime | 2 hours 14 minutes, the fastest to fully charge of all 16 brands | peak 27 watts, 5.6 watt hours drained capacity, the battery really struggled on this test | not tested | not tested |
| 14KQPZ$16 | low 121.3 F, high 138.7 F | 3:26 to 100F (slightly faster start than Lerat), 5:12 to 110F (8 second lead over Lerat), finished 7:27, 15 seconds ahead of Lerat | 1 hour 31 minutes | 3 hours 7 minutes | peak 39.27 watts, 7.98 watt hours drained capacity, 2 watt hours more than Lerat | not tested | not tested |
| 15Lerat$12 | low 121.7 F, high 145.1 F | 3:29 to 100F, 5:20 to 110F, finished 7:42, described as pretty good for a budget hand warmer | 1 hour 20 minutes, the shortest runtime of all 16 brands | 2 hours 37 minutes | peak 35.58 watts, 6 watt hours (1,621 mAh) drained capacity, below its 2,000 mAh rating | 107 F after 35 minutes wrapped in bacon outdoors in windy 40 degree weather | not tested |
| 16HotHands$26 for 40 disposable hand warmers | not tested | presenter could not give it a fair assessment because it is activated by air movement rather than electricity; it lost momentum after the first couple of minutes and only reached just over 90F when the test was ended at 10 minutes | not tested | not tested | not tested | not tested | 115.3 F after a 20 minute warm up period |
How it was tested
- peak temperature on lowest and highest heat settings
- time to heat a solid aluminum block to 100, 110, and 120 degrees Fahrenheit using thermal paste
- temperature after 35 minutes wrapped in raw bacon outdoors in windy 40 degree weather
- battery runtime on the highest heat setting until fully drained
- time to fully recharge the battery
- maximum battery charge wattage
- internal teardown, battery peak current output in watts, and drained battery capacity in watt hours
“the Deacon came in on top with the best average finish of 5.57...If I had to choose just one brand, I'm going with the Deacon.”