Topcon Hiper Lite+ Help!!

Hey guys I tried swapping my internal batteries out on my Hiper Lite+ because mine were not lasting. Now my rover is acting crazy when charging. It comes on by itself and wont turn off.I havent been able to charge batteries enough to use outside but acting this crazy im sure something is haywire. I stretched the bank to buy this unit and now to have an expensive problem could break the bank. I guess I should have paid Topcon the $940 they wanted to swap the batteries. Hindsight 20/20.

Thanks ahead for any help!!

Shane