Yep. If you remove the little Traxxas cover plate on the front of the charge it has the option for a balance plug. It will charge up to a 3s battery
Never heard of them.
Batteries: zeee or goldbat from Amazon. Cheap and multiple good reviews.
Charger: Traxxas 2972 EZ-Peak Plus 100 Watt NiMH/LiPo Dual Charger with iD System https://www.amazon.com/dp/B00XWBW2BO/ref=cm_sw_r_apan_glt_i_5D8E410T6AT9729ZXPX8
It's a lil pricey but it charges 2 3s 5000mah batteries in...