Model Forum / Radio Controlled / Land Models / January 2008

Hi - forgive me I'm a mechnical guy with limited electrical knowledge.: )
I noticed cell phone batteries have small circuit boards at the end of the
pack.  What is the purpose of the board?
I am being tasked with a project using arrays of larger lithium cells - I

iv recently bought a thunder tiger ssk v1 and it was fine when i first used
it but now it seems to have a mind of its own it revs and steers on its own
and what i do on the radio seems to have little effect iv asked a few model
shops and they have told me to put foam under the ...

Any thoughts?
I am building my first model since since arounf 1988.  Back in the day
I built a couple of Bigwigs and a couple of MRC models (the way i
remmber it, MRC had more presence back then).

20 years ago built and raced a Tamiya Big Wig along with a few other
RC's but had to give up the hobby for other life choices.
Well now.. I have  a youngster that burnet through a couple of NIKKO's
and so I bought hom a Duratrax Evader.

Can any tell me where I can get replacement parts for a 'Electric 1:1
4x4 Road Master RTR RC Racing Truck' made by Syma (I believe). I a
looking for replacement chrome rims (Christmas day crash broke one).
Broc