I'll throw this out there. I used an odyssey PC 625. I only got 6 years (124 Hours) out of it. I took it in to Batteries plus and they convinced me that I could get 3 or 4 more years out of it if I kept it trickle charged so I spent the $30 for a "good" trickle charger and have not had any luck. It charges to 13.6 and as soon as you take the charger off, you can watch the voltage steadily drop down to 11.25. Guess its trashed. I'll probably go back with the same one since the battery tray and and everything is set up for it.