Yes. Itâs an extra button
Spare button cap 
ah, thanks folks. 
The BLF LT1 is safe to charge with my Ipadâs 2.4 amp, 12W power adapter right? I also have a couple of Anker Powerport PD2 wall chargers, will they be also fine to use with my blf lantern?
I ordered on 3/23 with special note in the order comments requesting the latest firmware. Light arrived in good condition on 4/17.
It does have the 5.0 driver but firmware is 2019/11/29. If latest firmware is deal breaker for you you might want to wait till the 4th batch.
C to C is not a deal breaker for me but I hope to test in in the next day or two.
I do not have the programming key for the exposed pads. If the wires are long enough I will try to re-program with the chip clip but i will not de-solder anything to do it.
This was a huge boon to me I used the spare button on a C8F with a mtn lighted switch it was exactly what the doctor ordered to make my adaptation perfect.
I am new to BLF. Can I get in on this lantern?
Looks like I can buy it on Amazon. Is there a BLF discount code?
Read Post 10939.
Yes, any of those chargers should work fine charging the LT1.
Were firmware changes since then a big deal on the LT1?
I havenât kept super close track but I think 11/29 might be the latest. Thatâs what I have in my lantern. The only noticeable changes are SOS, and I think improved button press stability.
Is there an easy way to check the version? I thought TK was going to write that into Anduril at some point, but I dont remember if it ever happened.
not sure. I thought it might be in there already, but I tried several click variations up to 12 and didnât find it.
Wait, I did a quick search and found thisâ Anduril firmware's "version check" and "safety lockout" feature (Sept 2019 onwards) - YouTube
15 clicks from off.
verified my fw reports 2019 11 29
There have been two since 11/29. I dont know what the changes are but I suspect one of them enables C to C charging. The wires were long enough and I flipped over my driver my driver to flash 2020-03-18.
Took all of 5 minutes but it was a little off putting when Sofirn comes in here and states you only have to ask for the latest and when you ask you still dont get it.
But its more than that I have not had Sofirn get a single order right all year.
I ordered a SP10s w/batt and charger, did not get the batt and charger.
I ordered Q8 Anduril I received the older style Q8 with the flats on the body and Narsil UI.
Do they even bother to do more than glance at the orders?
I do appreciate the great lights at great prices, thatâs why I keep giving them my money but for gods sake will it cost them money to get it right?
Iâm not 100% sure, but I doubt any fw update will change the way the light charges I donât believe any pin on the controller interfaces with the charger chip. Iâll happily accept correction on this opinion.
we are late march now⌠where is the 3rd batch 
No. The firmware is completely unrelated to C-to-C charging. Thatâs entirely a hardware matter, and cannot be affected by firmware on the attiny85.
As for firmware though, some changes relevant to the lantern are:
- 2019-09-24: Added version check function (15+ clicks from off), and an automatic ramp-down if button is stuck.
- 2019-09-28: Added automatic lockout if button remains stuck long enough.
- 2019-10-02: Increased brightness of LT1âs muggle mode ceiling.
- 2019-11-18: Added SOS mode.
- 2019-11-19/20: Rewrote interrupt handling system to fix several infrequent issues like occasionally missing a button click while asleep. This also changed how it handles electrical noise conditions, by making it attempt to boot normally after an error instead of staying in a blinking error mode.
- 2019-11-29: Adjusted LT1 tint ramping brightness correction formula (was using measurements from a prototype, adjusted to match peopleâs reported values for production units).
- 2019-12-03: Adjusted LT1 tint ramping brightness correction again, based on more accurate measurements. Should keep power use and brightness closer to flat while changing the tint now.
- 2020-03-16: Rewrote all ADC-related code. Almost no effect on the lantern though; basically it should just make voltage readouts more stable.
- 2020-04-13: Recalibrated internal timing loop; time-based functions like strobe and beacon should be a little more accurate now.
There were lots of other changes too, but not relevant to the lantern.
Seeing as how colored versions are now problematic due to constraints, here I am voting again for focusing on adding the powerbank feature. Seems a waste to lug around 4x18650 and not be able to dip into those power reserves if light is not needed in a particular situation. Nitecore and Fenix both have lower priced lanterns with powerbank features so shouldnât too much of a stretch. Thanks again!
Yes, that one should include all the changes up to 2020-03-16.