Initially I was getting 2 days per charge and having no issues, but over the last 2 weeks the phone has only been lasting a day, and charging indicator appears incorrect, ie it will slowly creep down as expected, then jump from 1/2 to empty, often switching off due to flat battery even though it was reading fine before.
The second problem is that frequently when I plug it in to charge, within 15 seconds a warning comes up "charging error STOP CHARGING!!!", and this warning stays on the screen until phone is unplugged from charger.
As I said the phone is 4 to 5 weeks old from new. The contacts are like new, but I cleaned them anyway. Still does it. Just now it was playing up charging, 3 times in a row. Then instead of simply pulling the charge plug from phone - I switched off charger at wall, then back on and now its charging. Maybe thats purely coincidental, but these two problems are related it seems - so do I have a faulty charger?
Should I be returning the phone and/or charger?
Its probably my favourite phone I have ever had (from well over 100), I'd like to keep it but it seems this is a common Sony Ericsson issue - and while I have read through stuff in google, there is no consistent answer to the root cause of the problem.