Get 6 hours of heat for extended stargazing or hockey games that run into overtime. This small heat pack recharges via USB 2 and can be powered up or down to use as needed.
- Durable aluminum housing has silicone caps to absorb shock and repel moisture.
- 4400 mAh lithium-ion battery recharges via USB 2 in 5 hours.
- On/off button has an indicator to signal when the warmer is on.
- Maximum output temperature is 45°C.
- Overcharge protection prevents battery damage.
- Number of charge cycles is 500+.
- Output range is 0 to 45°C.