Nick Odell wrote:
I was just wondering how the performance of these LiPos compare with a
more conventional rechargeable lithium 123 cell. The 123 only weighs
4g more than the LiPo yet seem to have many times the storage capacity
so presumably there must be some reason why they aren't used in this
application. Any thoughts?

I don't know what you mean by '123 cell' (as mentioned a CR123 is
non-rechargeable. The company A123 Systems made lithium iron phosphate for
EVs etc, probably a bit large for you!), but possibly the amount of current
that can be drawn. A drone is going to take much more continuously than a
camera.

Theo