Because we've embedded a motion sensor, and because it only burns battery when moving, battery life on a charge is based entirely on the total number of transmissions, but... straight-through nonstop travel time yields about 8 to 10 continuous hours of usage on 10 second updates. If you were tracking a vehicle which only drove an hour a day, battery life would be somewhere on the order of 8 to 10 days.

Power (in percentage zero to 100%) shows on the website when you mouse over the device, similar to satellites in view. No buttons. No frills. Just a good solid device in a sexy housing, with the fastest updates and longest battery life per update in the industry.

This is the ONLY pager-class device in the market that updates REAL TIME with 20-foot updates when walking or 10-second updates when driving - especially with this sort of battery life.

Specifications:
Dimensions: 2.50" W  x 4.00" L x 0.90" D
Battery: Rechargeable Li-Ion Battery 1340 mAh 3.7V
GSM Channels: 850/1900 (United States) 900/1800 (Europe, Australia,  & Middle East)
Operating Temperature: -22 degrees F to 158 degrees F
GPS Tracking Of Up To 14 Satellites
ATT Coverage Area: GPRS Wireless Service
Average Operating Time: 8 - 10 Hrs Continuous Motion Drive Time
(i.e. If on a person or vehicle and moves 1 hr per day, the Spy Hawk Turbo will
operate for about 8-10 days, without additional extended battery)
10 Second Position Updates When Moving
90 Day Historical Playback 
Zone Alerts - Set Up To 20 Areas, Get SMS Text Or Email Alerts
Monitors Speeds - Alerts When Speed Thresholds Are Exceeded

The news come from www.bossgoo.com

GPS Tracking Equipment