I've recently taken on an assignment at school on calibrating BDI and IR compensation. I'm looking for advise on a Method of testing the batteries and attaining scientific results as to adjust IR compensation to extend the life of the batteries. It's important to note that we have 300 pieces of equipment and the batteries are changed at two areas in the warehouse. these batteries are NOT designated to any particular truck? Before I set out taking gravity readings I would like a method of conclusion. This will greatly benefit the company I work for in the long run.