No. Magnets having poor resistance is a myth. The material has poor resistance but large diameter and short length means the total resistance is negligible.
This magnet is a 1.53 mm long AWG –1 (yes, negative) solid NdFeB core wire. Despite poor material this conductor has a resistance of about 32 µΩ. This means that with a light pulling 10A the voltage drop is ~0.00032V.
Note that the number doesn’t include contact resistance which is likely higher than that (I would love someone more knowledgable to chime in).
In this case: the adhesive layer is likely an insulator which breaks connection.
Try using the magnet on a cell in a battery charger that measures the internal resistance. You will see a big increase. I’m not sure if this directly effects the performance on a FET driver, I haven’t tried to measure the amp draw difference, but I assume it would.
That, plus the potential to move around if dropped and cause a short makes me not want to ever use them. I’ll just solder blob a cell or get button tops or solder on a button top.
The older cyan and black are good cells (a good choice assuming you can solder blob them for series contact), the new blue 5100mah seem to be questionable. Like always, buy from a reputable store that does not sale fakes.
Here is a repost of my battery tests from a few pages ago.
I have nothing to take pictures of.
I have a phone (2016 flagship with android), but she does not see it very well. I would need someone with a tripod or take the pictures while I use the torch.
I’ll try if I find someone.
I finished testing:
-SP70 is, in my opinion, about 15-20% stronger in the distance and has more lumens than the Convoy L6 new (xhp70.2 + SMO). It’s a great flashlight for this price. I mean I can see it with her. I can not say how many meters, but a convoy building I could not see it well, just the roof shone a bit, while the SP70 lightens the whole building.
Excuse my bad English.
*As a small summary:
-Convoy L6 NEW wins the Thorfire S70s (I sold Thorfire)
-SP 70 wins the Convoy. :)*
Unfortunately, it did not come in perfect condition, it still has small defects, probably it was hit (but not during transport). She had a lot of dust on it. Packaging is not ok, the Astrolux lanterns are packed more nicely
I’ll be back tomorrow if I have time with pictures.
The SP70 has some bloody modes. I have to keep pushing to go to another level, or when I stop it many times I start my turbo. I’m not happy with this. Thorphire and Convoy have much better ways.
I like the moon mode