Power Sources (revised mass)

Why is it that 5 powerclips which have no mass according to the rulebooks, yet a 100SEU powerbackpack which holds the same energy as five "massless" powerclips has to weigh 10kg?


I made a revision that a beltpack masses 1kg and the backpack masses 2kg...with the obvious difference between them and the clips is the multiple ports and connection points along with the hardware to relay the energy from source to each port. On that same token, 5 powerclips (or any other ammo clip) masses 1kg (or 0.2kg each).

I summarily reduced the mass of parabatteries as well to 10, 20, 40, & 80kg for type 1, 2, 3, & 4 batteries respectively.


SOURCE
WEIGHT(kg)
5 clips
1kg
Backpack
2kg
Parabattery Type
---
1
10kg
2
20kg
3
40kg
4
80kg