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Thread: BU-353 battery

  1. #1
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    BU-353 battery

    Keeps last stored position , date ,time , satellite data. I have some questions:

    1-This battery is rechargeble?
    2-What happens end of life? Can we change it?
    3-I bought my BU-353 at 2011. its 3 years old. Battery may died? its important if battery died? Or its not important. Can still work but late fix to satellites?

  2. #2
    Variable Bitrate chris350's Avatar
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    why are you asking/? i wasn't aware there is a battery on the inside.
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    http://www.mp3car.com/vbulletin/work...ct-driver.html

  3. #3
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    Fixing satellites too late. I just want to know reason is dead battery?

  4. #4
    Constant Bitrate
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    Might be. When my battery on a different receiver (ublox5) went weak (after 2 years), it was sometimes not found on USB anymore and took very long time to get charged again and then also only lasted a few days without power before being not found again.
    I tried to change the battery, but it was built in, so I had to buy a new receiver.
    Its a big deal for me since I only drive my car in spring and summer. The rest of the year it sits in a cold garage without power to the battery and I guess thats not so good for it. I hope this time it lasts longer, but its already a year old again. It seems to get fixes very slow after it was without power for a long time, but once the battery has been charged for half a day or so, it get a 3D fix even in the garage very quickly.

  5. #5
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    I will try to change battery but its not easy. Have a metallic cover and no screw. But i will try. its ok if i break it because in this way annoying.
    Do you know what kind battery using BU-353 inside?

  6. #6
    Constant Bitrate
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    Im not sure, since I had a different one. It should be some kind of button cell, though.

    I think mine was implemented the same way yours is. Metallic clamp to hold it in place and soldered onto the PCB. I attached a picture.
    Attached Images Attached Images  

  7. #7
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    Mine looks like this:
    Name:  IMAG2273.jpg
Views: 96
Size:  35.1 KB
    Name:  IMAG2272.jpg
Views: 113
Size:  46.5 KB

  8. #8
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    Name:  IMAG2275.jpg
Views: 96
Size:  31.7 KB

  9. #9
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    Batterty information:

    Part Number: MS621FE
    Manufacturer: Seiko Instruments
    Short Description: BATTERY LITHIUM 3.1V RECHARGE

  10. #10
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    Disassembled battery from PCB. I will use battery holder outside. I will solder battery holder's cable to PCB and holder will stay out. Should i use high capasity AA or AAA battery? USB can charge it?
    Last edited by cem_ari; 04-25-2014 at 09:33 AM.

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