These boosters aren't available through retail outlets, and must be ordered through this webstore. There's another booster on the market that supposedly offers more voltage built by a company called RC Dynamics ( www.rcdynamics.co.uk/ ) ; it too has to be purchased from a webstore that operates outside of the USA.
I've used the TQ cells booster all season, but decided to try a LiFe pack for the last few weeks of our indoor season. I'll report my findings after a few weeks of testing.
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If you haven't seen the Serpent 120Link, you owe it to yourself to have a look. It is like no other 1/12th car out there. Believe me the pictures don't do it justice. http://www.serpent.com/product/410003
Also if you don't want to hassle with boosters and reciever packs for your electrics while running the 1s Lipo, get the new LRP stock spec speedo. It can do 1s lipo without the use of a laptop which the Tekin requires. The LRP also has the new aggressive profiles built-in for 13.5 and 17.5 which the Novak Havoc 1s doesn't have. http://188.8.131.52/main/productdet...&category=NULL
If you are getting an 12r5.1 just get the Xray XII LINK type. Its a little pricey but quality is far better than AE who lately merged with thunger tiger and I been finding some flaws in all of my latest AE kits. I Might sell my 12r5 converted to 5.1. It has the yokomo brace hop ups and full tamiya blue screws