I have 2 GTI 130 I purchased them memorial day weekend 2 years ago. They ran great first season then when it was time to fire them up last year batteries were dead on both. I went back to the dealership where I purchased them and they said I should put them on a trickle charger ALL the time. He even went to as far as saying when we go in for lunch they need to be put on the trickle charger. So we did that. This year they fired up then the next weekend we unplugged one on the dock to use the outlet for a compressor. It didnt get plugged back in and the next morning battery dead. So I have replaced 3 batteries on 2 skis that have about 15 hours each. Any suggestions on why or how I can prevent this from happening. I have called dealerships and they arent any help and seadoo said you have to call the dealership for tech support. One guy suggested switching to a AGM battery. Please help. Thanks!