At Inspired Energy, their solution is to provide a flexible bright yellow end caps which can be fitted over the end of their standard smart batteries. These provide insulation over the already recessed terminals and prevents any chance of short circuit from loose metal parts such as keys, paperclips etc. and they also keep the terminals free from dirt and other contaminants.
These end caps are available from Accutronics and can be purchased online via our website. Remember to add one of these when placing your order for batteries - better safe than sorry.