Xhp70 on FX-30 driver on 4x INR18650?

Hello Everyone and thank you for helping me with my problem I’m seriously stuck :stuck_out_tongue:
as i mentioned in subject I’ve already made a DIY Xhp70 projector running on a convoy L6 driver(FX-30)
and (bcuz of my miscalculation :person_facepalming: and buying/shipping issues of the standard/recommended Keeppower 5200)I’ve already bought 2x Samsung INR18650 25r 2500mah for it on series.and on the first try i saw the amperage on turbo mod is not reaching over 3100ma (at full charge),very disappointing :frowning: :frowning: :frowning:
I’ve already tested the resistor jumper ,not reaching more than 3200ma :frowning:
now i’m stuck with whether or not to buy 2x more Samsung INR18650 25r 2500mah to parallel with last 2 (2x on series parallel with 2x on series)
or
the standard/recommended Keeppower 5200 anyways and leave the last 2x 25rs

but I need your help with if it is possible to reach +5200ma/+4500lm with 4x Samsung INR18650 25r 2500mah. i just need to get as high as possible lumens out of xhp70 the higher the better also the run time duration and the heat dissipation is not the issue. just lumens :heart_eyes: :heart_eyes:

The 25R is a very capable cell.
It should be able to push way more than the FX30 can ask for.

Most probably there is something else that’s wrong with your build.

Things to look for:

  1. Use 22AWG or lower gauge wires.
  2. Bypass any spring contacts.
  3. Make sure you got no cold joints on your soldering
  4. Most importantly, verify that the cells are making full contact with each other. The 25R are flat tops and it’s highly likely that their connection might be bad.
    If that’s the case, add a solder blob on the positive side of one of the cells to ensure better contact.

thank you so much for your advice and sharing your knowledge ,I just removed the springs between cells and pressed them directly to each other and the amperage went high up to 4.40 .wow… didn’t know that removing a piece of metal spring was gonna help this much.
gonna check other items too ,thanks :heart_eyes: :heart_eyes: :+1:

Well you don’t have to remove them.
By bypass I mean that you can connect a wire between the base and top of the spring.

You can find lots of tutorials in BLF on how to perform a spring bypass.
Either way,if you don’t need the springs then removing them is your best bet.

The 4.4A current that you are getting is pretty close to the rated current draw that the driver is rated for (without having the sense resistor array bridged) so you should be good to go.