Any iPad guru's here? My battery keeps draining on charge :(

[griffin dai]

It's an iPad Air 2 64gb, had it 2 years last month and running iOS 9.3.1 (not keen to upgrade to iOS 10 just yet until it's sorted)

I'm not really sure what's happening here, for the last 2 years I've been using a genuine charger with the longer 2m cable, again genuine from Apple (this is 2nd cable as the first mushroomed and split after 6 months, this ones done the same after 5 months but has been fixed with some electrical tape and been fine for the last few months) 25 quid!!!!!! fking swiz!!!

I've noticed the battery charges fine when it's fully switched off, but it's not charging when is on and the battery power keeps going down & down until it goes off, then can't charge at all unless it's switched off again and left for a few hours.

I bought a new 1m genuine power cable yesterday, tried a different Apple adapter (the smaller 3 pin one) and tried powering it from a power bank incase there's a problem with the socket in work.

Tried charging with it on but in airplane mode....still the same.

So tried a reset holding the home & power buttons down....again still no joy. Just will not charge up when it's switched on but the charging symbol does come on when I plug it in.

Any ideas please gents!

Could the battery be on its way out? Typically I decided to just keep this and switch to the data only contract in August after my 2 years was up with 3 instead of getting a new one!!!!!

[griffin dai]

Thanks for the suggestions everyone, I can't back up & restore it until I get home in a fortnight (working away) but I'll give the Lightning port a clean tonight & take a look at what apps are running etc. Need to get it sorted, pain in the arse this!!!