Mine did the same, either killed by me or the dealer. I read up on these batteries and they are a unique battery.
If you buy a new replacement battery they come dry or precharged. Precharged are the easiest to work with. If you get a dry type the electrolyte must be put into the battery very slowly (about 30 minutes) to keep air bubbles out. Then the battery should set for 30 minutes and then you permanently seal it. The kit gives you everything you need to do this. Both then need a charge before using. Car charges should not be used unless set at 2 amps or less and time not to exceed the times shown on the battery case. The best bet is to charge with a battery tender
brand or another brand I belive is called the optimizer III.