I recently got a Maglite XL100 with a leaked battery pack. I want to use the host for a modding project and have no need for the electronics that were in tailcap.
These are responsible for the mode changes, depending on the rotation angle of the light. So I guess there is a kind of level gauge installed. Only I cannot say whether they still work properly, as I could not test the light. I had to destroy some main parts of the light in order to get out the battery holder.
Maybe someone has an idea how to use it in his own project. I would give them away for free, you just pay for the actual shipping costs.
Diameter is 19 mm, hight 7 mm without the plastic pins.
On the big chip it written:
A848 (or maybe A849, hard to see)
T84V
10MUAP
7F1578
On the medium one:
33DE
2912
On the small one:
J4A
The XL uses the standard Maglite pill, this is one with a Rebel LED. It light up when applying 3.6 V. I think that the tailcap electronics are only responsible for the mode changes.
Micro controllers are not really my business, I have to admit.
I just think that Maglite should rather have put some engineering effort to other things than to this fancy UI. From the video I saw it was not that intuitive…