can i charge my battery while is still on the car???i may sound daft but im not sure if it will affect the alarm if i removed the battery

 

should be fine removing battery! or also should be fine charging it on the car! (only the same as putting a set of jumpers on there)

 

I don't think fitting a pair of jump leads is the same as charging the battery. I've always been told to disconnect the earth lead ofr+ve lead so that the charge cannot go through the car circuitry, especially the alternator diodes whuch will fail of you leave coonected.
Anyhow - this is what I have done a couple of times with no problems re. alarm.
Rgds....

 

never had an issue on many cars just connecting a charger.. I often leave a car idle for a month at a time.
I just avoid letting the charger run with engine running.. as this is what can damage the alternator.. I just start engine and remove charger straight away.

Simon