Wurkkos & Sofirn
I wish there was an option on their websites to bundle the flashlights with higher performing batteries.
The bundled batteries are decent, but if a light is advertised at X lumens then I reckon there needs to be a battery available that can meet that spec.
Just have a couple of battery options:
1. higher capacity for longer runtime
2. max output
For example the Wurkkos TS21 comes with a Lishen 9.6A 21700 and even though I reviewed it to be capable of 15A, there’s too much voltage sag for the flashlight to provide the lumen output. It’s only slightly better than a Samsung 50E, not the newer 50E2.
The below graph is of the Lishen 21700 vs the Samsung 40T at 20 Amps to show just how much voltage sag there is in comparison. I’m showing 20 Amps because the TS21 requires a 20A+ battery.
Sofirn builds Wurkkos’ flashlights which is why I tie them both together. They bundle the same batteries.