...Ok here we go again for my monthly...'my bike won't start thread'!!

Was out a couple of weeks ago, parked the bike in shed, went in yesterday to start her, half hearted attempt then a few clicks and nothing!
Batt low, Kmph showing so put the charger on for 10-15 mins, tried a few times and all i got was a load of 'clicking', the dash MPH shot up with the clicking then when i stopped pressing the starter switch the clicks continued for another 1-2 seconds. Standing for two weeks with the alarm connected isn't a good recepie so i took the fuse out the alarm and connected the charger and left it
Will be back down on Mon morn and hopefully the gremlins will have gone, had similar probs in past when not left charger on, sometimes a bit of time passing or pushing it along the lawn has sometimes 'done something'
I'm sure it's not connected but i did unbolt the tank and airbox in readiness for a K&N filter adding, just incase there are any 'sensors' in that area although i doubt it
Fingers crossed will start on Mon and it will be just one of those things. Will have to stop spending money on 'bling' and invest in making the thing start everytime!!
Any comments welcome as per usual
Thanks guys