i have had the o2 mini s and using it on o2 payg for a while now and have no problems - however the battery ran flat yesterday (i normally charge prior to running flat) - whe i put the charger in it shows no sign it is charging (no lights light up) - and in fact i left in on all night - again no lights - and the device sometimes turns on the 1 or 2 seconds - shows o2 screenthen dies and goes off - i have tried the soft reset - but still it will not turn on - any ideas<br /><br />-- <br />