About the power consumption of the deform tool : it was written that it could be used for 30 seconds with only the internal battery. I measured that it was 8 seconds instead, but I also measured it was 8 seconds to empty a small battery... The small battery only has 8 units (10 in the backpack) and no regeneration. Which means it should at least be 10 seconds with the internal battery, with no regeneration, or like 12+ seconds with regeneration. More precise tests is needed.
More measurement : the deform tool definitely consume 1,25 units/secs. So the 10 units of the backpack are consummed in 8 seconds. When you have a secondary battery, it actually consume both batteries at the same time. When you have depleted the 8 units of the secondary battery, two units of the main one have also been depleted.