Extended Battery Pack for Garmin T 20 & TT 25 Collars – Up to 136 Hours of Tracking Power

Stay in the hunt longer without worrying about battery life. This user-replaceable extended battery pack is built for serious hunters and dog handlers who demand maximum runtime from their Garmin T 20 or TT 25 GPS collars.

With up to 136 hours of battery life using dynamic update rate, this upgrade means fewer battery swaps, less downtime, and more confidence in the field — especially on multi-day hunts or when tracking in remote areas.

✅ Up to 136 hours of runtime with dynamic update rate
✅ Easy installation with hand tools — swap in minutes 
✅ Designed for Garmin T 20 and TT 25 GPS collars

More power. Less worry. Keep tracking longer.