RoosterTheBuilder

I have found a 10v 700mA charger on ebay: http://m.ebay.ie/itm/201551910005?_mwBanner=1 My only concern is, if it will have the right diameter (i am the biggest noob at electronics as i am attending 7th grade). This is a very old post and i hope to see an answer, so i wouldn't spend my money and time.