Help choosing a 4s battery
 

I recently got a Tekin RX8 GEN2/Redline T8 GEN2 Brushless ESC/ 2050kv Motor Combo for my Team Associated RC8T that I converted to electric and could use help with choosing the right 4s lipo. Don't know much about these batteries so maybe someone can point me in the right direction? Thanks for taking the time to read my post...