Q: How long does it take this hand warmer to heat up?
It reaches about 104°F (40°C) in less than 2 minutes.
45K4219 - Rechargeable Hand Warmer
If you've ever found yourself clutching a hot cup of coffee just to keep your fingers warm in the cold, you'll understand why we like this convenient (but non-caffeinated) alternative. We prefer it over other hand warmers for several reasons. It's rechargeable, so you can use it over and over again without having to dispose of spent batteries or single-use chemical packets.
The slim, compact unit slips easily into a glove or pocket, where it warms to about 104°F (40°C) in less than two minutes and provides hours of warmth, regulated by an internal thermostat so it won't waste power or become uncomfortably hot. The internal lithium-ion cell (1000mAh capacity) charges in less than 2 1/2 hours from any standard USB port (charging cable supplied).
Whether for backcountry ski adventures or just sitting in a chilly arena during your child's hockey practice, it makes a great gift for anyone who works or plays outdoors during winter months.
It reaches about 104°F (40°C) in less than 2 minutes.
A built-in 1000mAh lithium-ion cell charges in under 2 1/2 hours from any standard USB port, with a charging cable supplied.
No. An internal thermostat regulates the temperature to prevent it from becoming uncomfortably hot.
| Materials | Lithium-ion battery |
| Dimensions | 3 5/8" × 1 5/8" × 3/8" |
| Weight | 1.6 oz |
| Includes | Hand warmer unit; USB charging cable; knit sleeve case |
| Package Quantity | 1 set |
| Power Source | Rechargeable lithium-ion cell (1000mAh) |
| Capacity | Up to 3 hours |
| Color/Finish | Color may vary |
| Warranty | Lee Valley Satisfaction Guarantee |

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Rechargeable Hand Warmer
If you've ever found yourself clutching a hot cup of coffee just to keep your fingers warm in the cold, you'll understand why we like this convenient (but non-caffeinated) alternative. We prefer it over other hand warmers for several reasons. It's rechargeable, so you can use it over and over again without having to dispose of spent batteries or single-use chemical packets.
The slim, compact unit slips easily into a glove or pocket, where it warms to about 104°F (40°C) in less than two minutes and provides hours of warmth, regulated by an internal thermostat so it won't waste power or become uncomfortably hot. The internal lithium-ion cell (1000mAh capacity) charges in less than 2 1/2 hours from any standard USB port (charging cable supplied).
Whether for backcountry ski adventures or just sitting in a chilly arena during your child's hockey practice, it makes a great gift for anyone who works or plays outdoors during winter months.