Optima Battery Question

I own an Optima Blue Top Dual Purpose Battery (D34M me thinks). I actually own two. I use one for solely my trolling motor(Endura 55) and other one for my depthfinder, electric start on my 9.9 mercury, and CMC tilt n trim jackplate. Is it possible to run a smaller thrust trolling motor on that one battery i use for my df, CMC, and Merc so I can cut down on weight to help plane my boat or would it be too many applications for that one battery? That Endura eats up a lot of battery.

For many years I ran one group 27 deep cycle battery as my sole battery to crank my 35 HP Johnson, run my trolling motor, my CMC tilt, lights, and pump. The 35 did have an alternator so the battery got some charge when I ran the motor.
Number of times I ran out of battery to power TM or start outboard??? Zero!

A D34M Optima is a tiny trolling battery. I'd take the second battery with you to try it out before you commit to it.