On Friday, October 26, 2018 at 4:59:27 PM UTC-4, John Huthmaker wrote:
At that price I would just crack the case open and find out if I could replace the battery myself. Its highly unlikely they made a battery specifically for this device that couldnt be sourced elsewhere.

They also do testing and re-registration of the unit since if I remember correctly the registration will expire with the buttery.