You've got a great flasher! I was told if you use it three hours, charge it for three hours after the use, four for four and so on. I did this for a year with no problems and then I won a Marcum Battery Charger Indicator, BCI50 on Ice Shanty. The 3:3, 4:4 ratios were farly close, but the Battery Charger Indicator gives you peace of mind. Good fishing...