This product is either discontinued or we cannot get that from suppliers.
Brand: Garmin, Model: 010-11828-40, Type: Battery Pack, Colour: White, Compatible: T 5 Mini Dog Device / TT 15 Mini Dog Device.
Bring along this extra lithium-ion battery for extended training sessions with your TT 15 mini or T 5 mini dog devices. This long-lasting rechargeable battery lasts about 16-30 hours per charge.