SO after spending hours putting my Matrix back together this week I finally got to bring it to the track. Everything was READY! EXCEPT I think the battery is dying in my ofna starter box. It doesnt seem to want to take or hold a charge. Its fairly new but who knows? Where can I get a new battery for it? There are NO hobby shops local so I am hoping that it may be a readily available item.... ANY ADVICE?!?!?!!! THANKS!