Originally Posted by DAK MACH

The x4 is a great charger for doing all of your smaller charging like receiver packs, glow ignitors, 2s packs, and starter boxes, but it falls short on guts when charging 4s packs as it will only charge them at 3.3 amps. Takes the better part of two hours to charge an ebuggy pack. If you use two 2s packs in your car, it's not too bad.