Stock battery is a 700mAh 16340. IMHO protected 1200mAh 18350 is the best choice for this light since it’s already pretty long and shorter length seems like it would make being able to manipulate both the ring and tail switch easier. Can’t say that from experience since mine isn’t here till the 29th though.
The highest cap 18500s I’ve seen are only ~2000mAh or less, doesn’t seem worth it to me.
Yes. Just like the 2019 or 2012 version…. you can turn the control ring and get a gradual smooth dimming all the way until you can barely see the emitter is lit when staring directly into it from close range.
Appears to do nothing as far as I can tell. The RRT01 has the hole in the ring but the RRT03 does not.
Yes, the 2019 head fits and works with the 2020 body tube.
I don’t have any protected 18350, but they should have no trouble fitting.
The 18350 that the new 2020 RRT-01 and –03 comes with, includes a built-in USB port and charging circuit. It’s much longer than my Aspire 1100 mAh 18350 and is probably longer than any protected 18350 cell.
The overall light is pretty big for an 18350 light. Especially so for the RRT-01 which is slightly longer than the RRT-03 due to the longer reflector. In 18350 configuration the new RRT-01 is about the same size as an FW3A with 18650 tube.
My first-gen RRT01 will run on AA/NiMh voltage, however I don’t have any body tube that supports that size cell. Maybe one can be adapted from another Jetbeam light.