Quark AA2 lego - 18650 vs 14500 recommendation for Quark lama?

[hnupek]

Hi, can't find this anywhere, so here's what's bothering me, hoping you could help me:

I have Quark QP2A Gen 2 and I know, it has lego ability - I'm considering to switch to 18650/2x123 body (will it be possible? or 18650 body won't fit QP2A head ?) or to go with two 14500 batteries with current body.

Also, do you think I could get more light / runtime out of 1x8650 or 2x14500 batteries ? Or should I stick to my current Energizer L91 primaries ? (currently I'm looking at the runtime/output, not the economical side of rechargables)

thanks :bow:

 

[Labrador72]

I don't have a Quark but on the site it says the voltage range for a Quark QP2A is 0.9V-4.2V so if you put 2x14500 you are likely to fry your light.
As far as I remember the QP2L's body could only take 17650 and the diameter doesn't seem to have changed so I don't think you'll be able to use a 18650.

 

[reppans]

^^ yup, that's one of the downsides to the Quarks, they stopped making 18650 battery tubes, although you might be able to find a used one in the marketplace. I understand a 17670 will fit in the 2xCR123 tube though. Any yeah, you gotta watch the voltage - the LV head is 0.9-4.2 and HV head is 3-9V. You can only run 1xLi-ion in the LV head and 1 or 2x Li-ion in the HV head.

You generally get more runtime out of a large single cell, not to mention being much less risky due to cell imbalance.