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Wouxun Battery life

Discussion in 'Discussions, Opinions & Editorials' started by W8DRZ, Mar 6, 2011.

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  1. W8DRZ

    W8DRZ Ham Member QRZ Page

    I got a wouxun handheld six months ago with the 1400mAh Li-ion
    battery pack. in fact I bought another a month later. Neat radio.
    Two weeks ago the battery stopped taking a charge and would
    only last about 10 minutes. Much to my surprise the second radio
    did the same thing yesterday. Both battery packs failed after only
    about 6 months use. I have ordered replacements but was wondering
    if i just got lucky or are others having battery trouble.

    Jim - W8DRZ
  2. K7MH

    K7MH Ham Member QRZ Page

    Are you sure the charger is ok?
    I have a few Li-ion batteries for my VX-2R that are 3 or 4 years old which I use and charge all the time and they are still fine.
  3. N0WYO

    N0WYO Ham Member QRZ Page

    I haven't seen any issues with the batteries, but I have with the charger. There are a few on ehams reviews of this radio.

    I got mine last month. No problems so far...
  4. W8DRZ

    W8DRZ Ham Member QRZ Page

    Wow, thanks for the hint. CHARGER FAILED!! Since i have two radios I have two chargers,
    one WAS still new in the box. The one I was using is kaput.
    The green light in on all the time even with no battery in the slot.
    When charging the red light flashes all the time, well for a long time anyway,
    overnight I have seen it green again BUT the battery would die after only a few

    Now with the other charger, steady red while charging, green when done.
    I never paid much attention to the led light until I had the second charger set up
    next to it other than I thought my battery was bad because of the blinking red.
    Cool, well now I have two 1700 battery's coming as extra's.
    What I need is a spare charger!

    Thanks for the help.

    Jim - W8DRZ
  5. N0WYO

    N0WYO Ham Member QRZ Page

    Jim, there is a pretty good review on youtube if you can find it. I was going to post it here, but I can't seem to find it. There is also a guy who describes the nature of the charger failure on youtube. I can't find either of them.

    You should be able to find the video on how to turn the audio up if your TX audio is low. I didn't have that problem.
  6. N0AZZ

    N0AZZ Ham Member QRZ Page

    Are they still under warranty? If so send it in for a replacement I would.
  7. N0WYO

    N0WYO Ham Member QRZ Page

    That's worth finding a US dealer and talking to them about a replacement charger, Jim.
  8. WA4BRL

    WA4BRL Ham Member QRZ Page

    Sounds to me as if that's ALL you've got now! :rolleyes:
  9. KB9HGI

    KB9HGI Ham Member QRZ Page

    I picked this up off a Wouxun yahoo group:
    Flashing LED

    My charger also had the flashing LED issue. In my unit after some charge time the LED started to flash between red and green for very long time. Also, 'wiggling' the radio in the charge stand/cradle did have some effect on the flashing LED and sometimes it did stop.
    After taking the charger apart and additional investigation it appeared that the charger's spring contacts did not make reliable contact with the battery terminals. A slight modification to the bottom of the charge cradle and spring contacts fixed the problem. After this modification, the battery charged properly and the flashing LED work as it is supposed to. Red during charge and green when fully charged. Now it is possible to just insert the battery alone into the charger and charges without a problem. This is handy if one has more than one battery.
    If there is interest in this modification, I can upload a written description with applicable pictures.


    Mort, NA6MA
  10. KB9HGI

    KB9HGI Ham Member QRZ Page

    I also picked this up off a yahoo group written by KD0FD:

    A couple of days ago, I was charging my kg-uvd1p in the car and I thought it
    flipped to green "charged" awfully early.

    The radio's battery was dead the next day. (It really hadn't charged the day

    I came home and the charger's LED was flashing red with no radio mounted.
    Plugged in the radio. charger kept flashing. Put just the battery in the charger
    and confirmed with a volt meter that the battery was not charging.

    Charger is adapter part: KG-HN-2

    Took apart the charger and the power transistor just to the right of the DC
    input jack looked pretty burned.

    The NEC SB722 transistor is a little different than the 2SB546 transistor
    specified right there on the board, but they are the same wattage.

    Off to radio shack. The choice was easy. They only stock one PNP power
    transistor and it is rated a lot higher than the SB722. It is also a larger
    package, but the lead spacing is identical which is not a bad thing. The Radio
    Shack transistor is a TIP42G.

    The diagram on the board also shows a heat sink so I found a low profile video
    card RAM heat sink in my junk pile. I cut it in half, but I think you might be
    able to fit it full size too. Drilled a hole in it and found a tiny nut and bolt
    in the RC Car junk box and I used permatex #27100 thread locker on it because I
    couldn't find my low yield blue 242.

    Plug it in and...blinking red light. Well shoot! Oh wait this is a PNP
    transistor. Duh! Spun it around and soldered it on crooked this time (bummer)
    and there ya go. Solid red.

    Plugged in the battery and watched the voltage on the battery start to climb.
    Noting was getting hot, so I put it back together.

    Tips: The lettering on the radio shack transistor should point to the BACK of
    the unit.
    There is enough room for a low profile heat sink to help the
    transistor junctions stay cool. Computer video card RAM heat sinks are about the
    right size and they are easy to cut and drill.
  11. N0AKF

    N0AKF XML Subscriber QRZ Page

    I have two of the 1700 batteries. Just tonight one of the batteries the red light flashes when it is in the charger. THe other battery charges up fine. Must be a battery problem?
  12. N0AKF

    N0AKF XML Subscriber QRZ Page

    Well I played around with the battery while in the charge. I moved it up a bit and it is charging now - solid red. I have not even had the radio a week yet :( Oh well, I might buy a spare charger to have on hand :)
  13. KD0FDS

    KD0FDS Ham Member QRZ Page

    That's kd0fdS. ;) Hope it helps.
  14. KD8DVR

    KD8DVR Ham Member QRZ Page

    The red light WILL flash IF the battery is fully discarged, or discharged to a point where the charger needs to exercise special care. At that point, the charger will charge at a lower current level. After 10 minutes or so, the red LED should go solid, indicating the charger is charging at a "normal" rate.
  15. N0AKF

    N0AKF XML Subscriber QRZ Page

    THANK YOU for the info! I know the battery was at 6.5 volts or so. Maybe that is what the issue was after all! :)
  16. KD8DVR

    KD8DVR Ham Member QRZ Page

    Oh yeah :) Definitely drawn way down. On these radios if the battery level indicator loses a bar, it is time to charge.
  17. N0AKF

    N0AKF XML Subscriber QRZ Page

    That would sure explain why it does not happen all the time :) Thanks again!
  18. K0RGR

    K0RGR Premium Subscriber QRZ Page

    One of the powerup options on the Wouxuns is to display the battery voltage. That might make it easier to spot a problem. Mine both power up at 8.4 volts.
  19. N0AKF

    N0AKF XML Subscriber QRZ Page

    Yep that's how I knew the one was at 6,5 - very handy feature :)
  20. N4JKD

    N4JKD Ham Member QRZ Page

    I got the battery voltage displayed on power up. With my 1400 mAH battery, I get 2-3 days off a good charge
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