A case to hold a Tile Mate T3001 tracker together once you split it apart to replace the battery. Simply insert a blade in the seam, pushing gently towards the front. Your blade should slip in about 1mm, try not to insert it further. Repeat this around the perimeter, gently levering the case open. The CR2025 battery can then simply be lifted off its sticky pad and replaced. Put the case back together, then slide into this printed case to hold everything together.