Yes I only had the ignition on when I plugged in the charger. Will try it in the future without having ignition on prior to connecting to the footwell socket. Car all locked up whilst charging. Car is in my garage. Been out a couple of times over last 5 hours To check everything is ok. Just been out again and battery now in the “care” mode having completed its charging. The CT5 Stop/start is easy to use as everything is automatic with nothing to press.Assuming you turned off the ignition. I've never turned mine on to start and it just stays on full time. Also, hadn't seen that version of the CTEK, so let us know how it does.