My point stands. If you fly alone in space, as a battleship, you deserve to be shred to pieces by bombers, cruisers and whatnot. A battleship is not meant to fly by itself at all.
I acknowledge that it is what you / your character wants to fly, but you should be aware of the consequences.
- Getting engaged because it's a large warship
- Getting countered by bombers, cruisers where you let them kite you if you happen to engage
- Generally having a large ship that is easy to hit and slow.