Thanks marci, and sorry to derail (….and bring confusion) with all the driver talk.
So it’s this one on the MRsDNF list:
He did not test on 2AA here.
Always on the lookout for a good 2AA boost driver. If it can do 80%+ in that voltage range, (….at whatever current to the LED), I’m interested. If they are lower current, it’s more likely it may have better efficiency.
That driver with Li-ion though; better efficiency with 7135 driver.