Optical cloak draining advanced ups power are way too fast

I just use the FB51 optical cloak try to get pass those chicken walker, and I rechange advanced ups full to 2500,

then I just take a small steps, a few tiles away, and it say the optical cloak shuting down and I appear right front the walker

lucky I was close to walker, it just shooting me with guns, not grenade, and I was blast it with a auto rifle AP bullet

considering how plutonium cell rare it is, I suggest mabye some one can lower some cloak draining speed, make people enough to go through a small town or something

the invisible CBM can doing much far away than this, and artifacts make invisible anytime.