Originally Posted by
Danny/SMC
Not sure what you mean by this.
I used 4mm male connectors and 4mm female tubes and measured the IR of the cell through the connector. I did the same with the 5mm connectors. The fit of both connectors are nice and tight.
I must admit I would of expected the 5mm to be equal or possibly better but it isn't and this is why I never pursued 5mm inboard packs. Also my 4mm adapter has been used a good amount and normally this increases the resistance. The 5mm adapter uses brand new 5mm connectors.
Assume you were to measure the force to push in the 4mm, then measure the force to push in the 5mm, and they both require the same force. The 4mm would in theory have higher force at a microscopic contact spot than the 5mm. However, there are more microscopic spots (contact area) with the 5 mm than the 4mm.
Seems like a good trade off (more spots/area), but as you've measured funny non-linear things happen with contact resistance. Maybe contact force is more important than contact area?
If all else fails... Make more measurements!
PS - Believe your result; just fun engineer speculation trying to justify/quantify above.
PPS - I run a Shorty SMC pack. It's great! Keep up the great work!