That sucks, sorry to hear that.
May I suggest some preventative measures for your new battery.
This is the battery setup on my 2013 Eagle. I installed a second battery and have them both padlocked to deter theft.
I got the battery locks here:
BD RV Battery Lock
FAA A&P mechanic, ex-RV dealer parts dept
Retired B-52 Gunner/Flight Examiner, B-52 Crew Chief
2016 Jayco Eagle HT 29.5 FBDS w/ 15,000 BTU AC, 50 amp service, upgraded counter top, thermal pane windows, elec. stab jacks, outside grill, backup camera and MORryde pin box.
2011 GMC 2500HD DURAMAX/ ALLISON