Ever consider going with 2 X 14500 Li Ion batteries? Then you don't need a low voltage D26.
2 X L91 Lithium primaries might be OK with that L-Mini II driver or you could add the Javelin extender and go with 3.
You might also check back with your dealer. I have the same Javelin setup as you do and mine doesn't whine.
I'll check with Dereelight, but the pill I got was only a few weeks ago. the LE was delivered from HK and I'm reluctant to do business with a far away place again as the turn around time for a return would be months.
I'll go with NiZn before I start spending 2 dollars a cell, but I doubt it would give me the same amount of light as a proper driver current controlled low voltage driver. Li-Ion are out of the question, they require too much care and cost way too much. Besides if I went Li-ion it would be 18650s in a more powerful light than a DBS.
I think you would be better off ordering another Javelin driver as Dereelight make revisions, i suspect you may have a slightly older one that has the annoying whine. It's best to email him, just to make sure. The other two drivers you posted links to would not be suitable.
Thats disappointing. The problem is that what Alan from dereelight might consider normal, I might consider too loud and I don't want to spend that much time or patience to deal with sending a 28 dollar lamp between 2 continents. It's not a bad suggestion, I'm just not willing to allocate the time.
From what I understand, your telling me I have no alternative...