Underwater range and endurance

[ETR3(SS)]

The problem with the recharge times and endurance has to do with the speed you travel at. I don't recall the exact speed offhand but traveling at less than that speed will drain the batteries faster than if you were traveling faster than speed X. Adjusting the range at speed endurance typically results is longer recharge times. In short, you're chasing a ghost. The problem is in a part of the game that we don't have access to.