OK so I finally got enough money and bought a Hitec X1 Acplus multi charger and balancer. Cost about $60 then got SPC 7.4 lipo and 11.1 lipo. Charged the 7.4v 5000 mah at 5.0 amps for about 45 min. I noticed that the battery didnt even get slightly warm and my stampede vxl didnt even mushroom the tires barely, my stock nihm battery it came with had more power.... what did I do wrong??? IS it the charger or what?