We have three Optima batteries in our boat. 1 crank 2 for elec. and trolling. After hour or so my 997 and 595 read "low voltage" and is a pain in the a>< jackin with it all day long. From what im reading on batteries optimas aint the best elec. and trolling batteries. If they are , can hooking them up in parallel solve my problem A.K.A troll fury? Or should i go back to cheaper battreies with longer reserve>