ArmyTek        
Results 1 to 3 of 3

Thread: Battery charger and flashlight error

  1. #1

    Join Date
    Jan 2008
    Location
    In the northernmost Sweden
    Posts
    3,176

    Default Battery charger and flashlight error

    Yesterday evening I went through some of my flashlights to check the batteries. I took the EagleTac MX25L3 in the hand and it felt by the weight like the cells were in it. I tried to switch it on but no light. I asked my self if it has a lock out function activated which I could have forgotten. I removed the tailcap and yes; three cells were in it. Then I placed the cells in the charger and got a shock. How could this be possible? I knew about parasitic drain but such a huge and only for one of the cells?

    Here is a picture from when I first placed the cells in the charger.



    After a while the voltage had raise to 0,4V on the cell to left and a marginial increase than initial for the other two also. I interrupted the recharge for a walk and when I came back and started the charging again it showed this:




    I assume that the charger gave the wrong information first time(probably a contact issue) and all cells were around 3V(a protected cell can't be discharged to 0,2V and if so it could not restore to be ok again, right?). But if so: why didn't the light turn on?

    Now all cells are fully charged to 4,2V and the light works properly.

  2. #2
    peter yetman's Avatar
    Join Date
    Mar 2014
    Location
    North Norfolk UK
    Posts
    1,791

    Default Re: Battery charger and flashlight error

    Maybe the protection HAD kicked in. Isn't it about 2.6 - 2.7 area?
    Then it reset when you put it in the charger, if they were in series it only needs one cell to trip.
    At least your cells aren't stiffed.
    P

  3. #3

    Join Date
    Jan 2008
    Location
    In the northernmost Sweden
    Posts
    3,176

    Default Re: Battery charger and flashlight error

    Quote Originally Posted by peter yetman View Post
    Maybe the protection HAD kicked in. Isn't it about 2.6 - 2.7 area?
    Then it reset when you put it in the charger, if they were in series it only needs one cell to trip.
    At least your cells aren't stiffed.
    P
    That sounds like the explanation. Usually I don't leave lights with low cells for extended period but easy to miss with so many lights to take care of...

Posting Permissions

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