Some here may wonder about the $5 Siskiyou is referring to. I mean how can 4 - Samsung 2800 mAh be only $5? In my case, and others, I have lucked out every step of the way on this one! The battery deal referred to is a NOS $10 laptop battery pack deal that he posted about here on BLF a couple of months ago. 8 Samsungs, new and in perfect condition. Turns out it is the perfect companion for this light, 2 sets of 4 cells. One in the light and the other set charged up ready to go. The deal has expired now but here is the link.
Another benefit of these cells is that they are meant to be “over charged” to 4.3V. I won’t normally be using them that way and neither will most others that picked up on this deal. But I thought I might as well go for it and see what they will push through the light at 4.3V, so I charged them up.
On high, 15.02A
On “low”
Notice that 1/10th of a volt more pushes another 1.25 Amps. The open circuit voltage is not what does that but rather the voltage while under load. I’m sure IMR’s would do even better, as they will not sag as much under load. I have some, but so far I have resisted trying them out in this light. My biggest fear is blowing the traces on the MCPCB