Q: How do I keep track of public charging points? There are at least three different apps on my phone already; do I need one for every charging network? – D Hurley, Co Cork A: This is a perennially tricky question, and it highlights the inherent problem of trying to mix public and private investment for something as all-encompassing as electric motoring. The annoying fact is that there isn’t just one app that will cover you for all eventualities, so you might need to upgrade to a phone with more storage space. In theory, you shouldn’t need any apps at…