I've had my 2 Ionic 50s now for 2 months and fished 6 tourneys with my high sided 900# tin and still have only 2 cycles on them. A cycle is when you run them below 85%. So first cycle was when I got them at 75% and second was after about 7 hours of spot lock in heavy current and they were down to 84%. Most times they are only down to 88 or 90%. This is with an 80# Ulterra. The 50s are amazing batteries.