Enlarge Image

Garmin Battery Packs for T 20 & TT 25 Dog Devices Garmin Battery Packs for T 20 & TT 25 Dog Devices are available in standard and extended.  The standard battery pack is the same as the battery that came on your T 20 or TT 25.  It allows up to 68 hours using dynamic update rate. The extended battery pack is an upgrade on the battery that came on your T 20 or TT 25.  It allows up to 136 hours using dynamic update rate. Free shipping on this product. Option: Standard ($79.95) Extended ($99.95) Quantity: Add to Favorites