Well can I ask which remote it is that you have? Most of our remotes open with either a push and slide or push the clip and pull method.
The new one for the 2016...similar to the one for my 8000 but that one i can open, the 650 is the one that is impossible without prying it with tiny tiny screwdriver that I am just lucky to have lyin around
Look like this one?
The whole silver portion of the remote comes off. Be sure not to hold any of the silver part. Hold the remote by the black edges, push the silver portion like the arrow indicates and it come right off. It took me hours to figure this out. This remote is poorly designed.
When all else fails just stick a piece of clear shipping tape on the top and on the bottom halves and pull the two tapes in opposite directions, according to the arrow. The tape gives the necessary grip.