Battery Charger

[paxham]

I have a 1st Generation N7 that doesn't charge properly.  I bought a new battery for it, which worked for awhile, but also stopped charging.  Other than that, my N7 worked and looks great.  I would love to get it back into service if possible.  Is there such a thing as a stand alone charger that will charge the battery outside the device?  If I could just pop a fully charged battery into it whenever necessary, I think it would work just fine.

Please Advise,

Paul