This one-cell extended life GPS battery works with the GL300 series GPS units, including the GL300, GL300VC and GL300W units
Extend the life of your GPS unit up to a full month or more, depending on movement and ping rate
for maximum life and use with your GPS unit.
- One cell 3,500 mAh rechargeable lithium ion cell battery pack
NOTE: This maximum life battery must be used with the large GPS case or the Microslim GPS case.