Trackers in saddles?

[sbloom]

I think there is a challenge here in making a battery small enough that isn't rechargeable or not long lasting enough - that is small enough to fit in the saddle without compromising the performance of the saddle itself?

Welcome, you've done what is known as resurrect a Zombie thread , not sure how you've got huge writing but others might know! And yes, absolutely, that's why it's 7x2.5 cm.