I will add some of my observations as I got the Sofirn 1.0 and BLF-LT1-A2 versions:
"Sofirn 1.0" seems to be the "interim" 1st version of the BLF LT1 with powerbank, so "1.0" may mean "v1" or "Anduril 1" - it comes with Anduril 1 (firmware version 2020-06-02).
"BLF-LT1-A2" seems to be the updated 2nd version of the LT1 with powerbank function, so "A2" probably means "Anduril 2" or the second version -- it comes with Anduril 2 (firmware version 2021-01-25 model 612) = based on TK's list of MODELS, the "612" refers to the ATTiny85 version, I wonder if anyone already got the ATTiny1616 version already of LT1, which would blink out a different Model code.
Some of my other observations, in addition to what "Story" mentioned:
1) "Sofirn 1.0":
- charging current (input to the lantern) seems to be 5v/2Amp but can be a bit higher than 2A (I noticed momentary 2.2A using a USB meter), note that I didn't do a full test, just tried it momentarily with partially charged batteries
(comment: the original BLT LT1 v4.3 or v5.0 board, charges at default up to 5v/1.5A setting max, or 5v/0.75A if set to that setting; so the LT1v2.0 can charge faster with enough USB power source current)
- USB out (powerbank function), using USB Meter "Protocol Detection", it does not have any Protocol (which may mean some selective devices may not charge at higher current if they do not detect a supported USB charging protocol)
- I used a USB load tester and tried 5v/2Amps, which appeared to work (it may also support higher than 2Amps, with not much voltage sag for 5v, but I haven't tried to push it)
Button LEDs:
- the normal button light is Orange, which follows the Anduril state (Off / Low / High / Blinking); this Orange LED always works independently of the other color LED (meaning it will be lighted up along with the other LED mentioned below)
- the other color LED depends on how the USB port is working:
- while charging LT1 lantern: flashing (or steady?) Red
- finish charging LT1 lantern: steady Green
- while in powerbank mode: steady Blue
2) "BLF-LT1-A2"
- charging current (input to the lantern) seems to be 5v/2Amp but can be higher than 2A (I noticed momentary 2.7A using a USB meter), note that I didn't do a full test, just tried it momentarily with partially charged batteries; so this "A2" can charge at higher current if the USB power source can supply enough power
- USB out (powerbank function), using USB Meter "Protocol Detection", my USB Meter indciates it supports DCP5v/1.5A, Apple 5v/2.4A, Samsung 5v/2A protocols
- I used a USB load tester and tried 5v/2Amps, which appeared to work (it also supports higher than 2Amps, with not much voltage sag for 5v, but I haven't really tried to push it further, I think 5v/2.5A or 5v/3A might be possible)
Button LEDs:
- the normal button light is Green, which follows the Anduril state (Off / Low / High / Blinking); this Green LED always works independently of the other color LED (meaning it will be lighted up along with the other LED mentioned below)
- the other color LED depends on how the USB port is working:
- while charging LT1 lantern: flashing Blue
- finish charging LT1 lantern: steady Blue
- while in powerbank mode: steady Orange
(aux-LED state seems to always apply: so let's say we set Anduril aux-LED state to "Blinking", and we are charging the LT1 lantern, then the button LED will be "blinking Green" + "flashing Blue")