Strange flat battery behaviour

I have my Speed Triple on an Accumate but due to some poor admin I left the keys in the ignition. When I realised today I used my car battery to jump start the bike (which I have done before with ther bikes) and got it going. When it started however the engine idle was all over the place and the speedo was showing speed depending on the idle speed (between 15 and 40mph as I was trying to keep the idle high). Eventually the bike stopped again and I decided to give up and get it recharged.

I plugged the bike back in and the alarm kept going off but just single repeating siren. It doesnt seem to be charging so I have switched it off.

Any ideas what I should do?

 

I finally got the bike going but that wasn't the end of my woes.

I rang a local dealer and he recommended running the engine for a while whilst attached to the car and then to take it for a run. I did this but as soon as I disconnected the cables the idle went a bit odd again. I whacked the seat back on and went for a ride. The idle was all over the place still, the speedo read 148 at one point, I wouldn't mind but I was doing about 30 in a 30 zone. The indicators didn't work and the neutral light kept coming on. I decided to take it home after 5 mins but then it just shut down completely. Luckily I was next to a house owned by a nice man called Douglas who now has a Speed Triple in his garage. We (Me & my new buddy Doug!) tried charging the battery out of the bike for a few hours, during which time I went home for lunch, but it wouldn't even turn over after that - even when attached to the car. Slightly concerned I have really done some damage but going to get it picked up today anyway and see what I can do with it...