maxFlex settings for a single 3.7v 18650?- Mtbr.com
Results 1 to 4 of 4
  1. #1
    mtbr member
    Reputation: deesta's Avatar
    Join Date
    Sep 2008
    Posts
    1,017

    New question here. maxFlex settings for a single 3.7v 18650?

    Hi all
    I'm having a couple of problems with my rear light....it lights up fine then, after a short time, stops. I think it may be to do with the cutoff/voltage settings on the maxFlex. Has anyone used a single battery with a max? If so, what settings would you recommend?

    I'm running 3 x red XP-E LED's with V5 maxFlex

    Fully charged, the battery is 4.13v

    Cheers
    Steve

  2. #2
    mtbr member
    Reputation:
    Join Date
    Apr 2010
    Posts
    489
    At what current are you driving your LEDs? What's the cutoff set to? Measure the voltage of the battery when fully loaded before cutoff and also measure the current draw from the battery. Is the battery protected? What brand? Measure the voltage of the battery after the cutoff. Under load there will be voltage sag. How much depends on the internal resistance of the cell. Drain the battery to 3V when not under load and and set the cutoff to whatever measurement you get under load.

  3. #3
    mtbr member
    Reputation:
    Join Date
    Oct 2009
    Posts
    373
    maxflex need 2 cells,
    min 4V, single cell will not work

  4. #4
    mtbr member
    Reputation: deesta's Avatar
    Join Date
    Sep 2008
    Posts
    1,017
    Mine is a maxFlex v5 which will do 2.5V so no problem using a single cell.

    I'm not too sure how to check cut-off etc so, based on the pre-set cut off for 2 cells, I've set the cutoff @ 3.1v. All seems to be working properly now.
    I think the light was going into cutoff mode which, as I'd not set it right, would explain the problems..

    Thanks for the replies guys

Members who have read this thread: 0

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

THE SITE

ABOUT MTBR

VISIT US AT

© Copyright 2020 VerticalScope Inc. All rights reserved.