Stay warm at a star party or on the trail and keep your portable electronic devices fully charged with the ThermoCharge power pack and hand warmer by Celestron. The Celestron ThermoCharge heats up quickly and reaches a maximum of 45°C (113°F). The 4400 mAh rechargeable lithium battery provides up to an impressive 6 hours of continuous heat on a full charge.

ThermoCharge delivers a full charge to most smartphones, MP3 players, cameras and many other USB-powered devices.

Unlike single-use chemical hand warmers, ThermoCharge is safe, scent-free and rechargeable. Just plug it into any USB charging port. A rugged aluminum housing and protective silicone caps make the Celestron ThermoCharge perfect for your next cold-weather excursion.

• Dimensions: 1.76" x 3.72" x .9" (44.9mm x 94.6mm x 22.9mm)
• End caps: Silicone caps for protection
• Input voltage: 5V-900 mA
• LED status indicators: (4) Blue LED indicates internal battery capacity, (1) Green LED indicates charging external device, (1) Red LED indicates hand warmer function
• Output voltage: 5V-1A
• Ports: (1) Mini USB in port for charging internal lithium ion battery, (1) standard USB 2.0 out port for charging devices
• Power delivery, time to charge: iPhone 5 (1540 mAh): 1.7 to 1.8 hours, iPhone 4 (1400 mAh): 1.5 to 1.6 hours, iPhone 3/iPod (1200 mAh): 1.3 to 2.4 hours, MP3 (300 mAh): 30 minutes
• Temperature max: 40C to 45C (104F to 113F)
• Weight: 5.22 oz (148 g)