2 slightly different chargers...

I have two PA-12 (whatever that means) laptop chargers. They are the same size and have the same connections the only difference is one is A01 and the other A02. I have an xps m1210 and I have been using the A02. I'd like to know if I can use the A01 as a 2nd charger. I would love to have a charger to leave at home and a seperate to lug around!

Thanks