I will get one with SFH55 but unfortunately I cannot buy the 26980 battery directly from AliExpress because it is not offered so I will buy it from Nealsgadgets.
We don't think the chart is accurate in all respects, but a lot of it seems to be.
The issue with the K80 SFH55 is if it truly can pull the amps, it should be over 30 and that's not great on any single cell. That's why the bigger WT90 triple 21700's is right now about as good as it gets. Was thinking of a GT90 too, 8 18650's should do ok also.
Interesting if the WT90 with one SFH55 would do as good as the triple SBT90.2 HL HK90. Or put three in a HK90 and get >30K lumens? Interesting...
Wow! The WT90 with SFH55 will be a complete monster!
I will probably go for the SBT90.2 in the k80 for three reasons:
1. I don’t yet have a torch with a SBT90.2 and this host looks perfect for it.
2. As you motioned, a single 26800 is not enough for the mighty SFH55.
3. I want more throw.
I’ll obviously wait for Simon to release his version.
Hi Tom, what do you think about the 26980 battery that Neal offers, do you think it will be enough for SFH55, they say it can continuously deliver 40A and up to 60A peak, do you think this is true and do you think it can bring the performance closer to 3x21700? Thanks.
I thought I had one, can't locate it if I do. Hard to imagine continuous 40A from one cell. I'd say let's see a test, but don't think Mooch or HKJ can test at 40A, not sure. Other issue can it drive this LED at high amps on a direct FET - is the LED's Vf low enough and the battery's resistance low enough to achieve those high amps for any length of time. That's more concerning.
At those currents, voltage drop at every connection is likely significant. Traditional spring contacts aren’t good enough imo. A compression design using the tailcap and flat, gold plated discs would be required, but this would not be a general consumer design. A built in cell could maybe get you there, but people don’t like that around here. I think we are losing touch with how much power this is…