56Volt 7.5 Ah Battery, like to know what the expected life on this battery is
If it helps. I have put my 4 ah battery through hell. Probably 4-5 hundred charges. Maybe more. Plus I use it in non ego tools. That are not nice to it.. they really do take a beating. I would say at least 7 to 10 years. Keep them at a proper storing charge and you will be fine.