I like these HPI packs because of that little adapter they come with. In most cases you end up changing the plug end, or buying a switch harness. With this battery you have both options, becuase it has the adapter packaged with it.
[link=http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXFJT1&P=ML]HPI 1200[/link]

Good long lasting battery!

Without knowing what charger you have, its hard to answer the second question. This Duratrax is a great charger, and myself and many friends use it. For the price, its excellent!
[link=http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXCLD5&P=ML]Duratrax digital charger[/link]