The Canon EG-E1 Extension Grip is an add-on accessory for the Canon EOS RP Mirrorless that provides enhanced ergonomics for users with larger hands. Key features include:
Designed specifically for the Canon EOS RP.
Provides a taller grip for users with large hands.
Retains access to battery and memory card compartment.
Grip attaches via 1/4"-20 thread. Offers 1/4"-20 pass-thru for tripod use.
Does this grip provide any additional battery / power functionality?
No, this grip has no electronic functionality and has no affect whatsoever on battery performance.
Just as a follow-up, it also does not add any additional buttons or dials for vertical shooting. It is just an extension grip to make the compact camera more comfortable to hold.
Does this grip work with any camera besides the Canon EOS RP?
No, the Canon EG-E1 Extension Grip is only compatible with the Canon EOS RP Mirrorless.