Lithium battery for WR 450

[mxzguy]

Need a new battery for my 07 WR 450 and was wondering if anyone has tried a lithium battery and if they are worth the additional cash? And where could I get one in Edmonton?

 

[250mark1]

I have a shoria in mY 450 excr ktm . Not worth the dollars in my opinion if it's even 5+ degs it will not start my bike
once the bike Is warmed up it will start no problem next day it won't start on estart