S20 Approach shuts down and has to be restarted

My S20 is two and half years old, it will switch off after about six holes and has to be started from scratch. This thereafter happens several times during the round. I have soft reset, factory reset and updated but it still keeps cutting out. The battery charges OK and runs down as normal. What can I do to rectify this I do not want to replace the watch after only two and half years.