XVive U2C Battery Kit (BU2)

I had to return this battery replacement kit because it didn’t fit my Version of Xvive U2. In other words, it was incompatible although the description says it’s for the U2 model. My Xvive U2 is already a few years old and when trying to use the kit it became clear that the screwdriver didn’t fit the 3 tiny screws. And on my Xvive U2 receiver and transmitter the batteries are soldered to the board. So no way to unplug the original battery. I think Thomann should inform that this kit is only for updated versions of the U2.