On a second look...
I'm not sure the EC is the problem...
The activation for the Armor should be right out of the question, no limitation on that, I realise this might be a simulation on climbing into the battle suit but...
The END Bat could have Extra Time to warm up, but still its not worth the weight of the limit given to it...
Sensory Equipment and Life Support...
Do these cost END? If so then the activation might be appropriate, letting the vacuum tubes warm up if you will, still I'd take some of the weight out of the limitation for the extra time...