My mom has a 2013 CR-V which is fitted with a wimpy and frankly inadequate group 51R battery. I'm getting a little tired of constantly having to run out and charge the thing, so the plan is to fit a larger battery. Apparently a group 35 will fit without much difficulty. However, underneath the battery there's a little removable plastic tray. This is sized to the 51R battery and isn't going to fit a group 35. Is this tray actually necessary or can I just remove it and put the battery on the steel shelf below? I don't want to do anything that could hurt mom's car, but it seems the trays aren't vital, unless I'm missing something. I know that if necessary, I can get a battery tray from an Odyssey Minivan, which drops right in, but that's probably going to require me to mail order the part as I don't think many Honda dealers stock them.