2S driver based on Attiny13A?

[MRsDNF]

Theres probably a few threads showing how to mod the 7135 driver to run 2 batteries in series.

Heres one.

Modding Qlite 7135 to Drive MT-G2?

Hi, I am hoping this can turn in to a sort of ‘How To’ type thread for people who go looking because I had a bit of a search and found a few threads around with some info in them but a dedicated thread on how this is done would be helpful. So this is something that I want to have a go at. Stacking the 7135 chips is fine, I have done that before, but I want to check what is done before that and what exactly this mod allows me to do? I.e. Run two 18650s or 18350s? Only power an MT-G2? etc. I fo…

Edit. Heres a search of the forum for Zener mod.

http://budgetlightforum.com/search?q_as=zener%20mod