Compact Power Pack for Live Track GPS Units. Perfect fit for the Spark Nano 3.0, GL300, GL300W, GL300VC. Double or even triple your tracking time with this rechargeable Li-Ion battery.

works nice, magnet is super strong. The magnet is almost to strong, you have to really yank it off the frame of a car.The container should have been a little thicker, that's my only beef with it. The battery helps it last longer for me it was about 2 weeks i never pushed it past that.I wrap it with rubber bands, to be sure it does'nt come apart.

The magnet case is too weak and it could fall from the car.

Great product!! Strong magnetic base and well built solid case.

Great case, waterproof and solid construction. Very strong magnetic base and fits both of my GL300 and new GL300W. Three extra weeks of tracking for a great price!