PSA: Check your X4 charges correctly. Don’t use a nice battery to check.

by SiteRelEnby

3 Comments

  1. SiteRelEnby

    This is most likely to happen because the charging IC they use needs a resistor to set the cutoff voltage. If the resistor value is wrong, it can charge in LiHV mode.

    I’m checking another now but I think it’s going to happen to all of mine.

  2. CrispyScooter

    Mine only charges to 3.9 then goes blue. And won’t charge past

  3. clackington

    I’m beginning to question my decision to order one of these lights. Between here and BLF there seems to be a lot of posts about X4 problems.

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