User-replaceable, charge your Garmin Alpha T 20 or TT 25 dog devices with this genuine spare or replacement extended lithium-ion battery pack.

Allows up to 136 hours using dynamic update rate.

• Lithium-ion battery pack
• Recharge collar with 4 hour fast charge
• Genuine Garmin spare or replacement part
• Allows up to 136 hours using dynamic update rate
• System compatibility: Garmin Alpha T 20 or TT 25 dog devices only