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Thread: ******** MTH800 without battery on charger

  1. #1
    Member Reputation: 47
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    2012-12-29
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    Default ******** MTH800 without battery on charger

    i would like to use an MTH800 without any battery while it is connected to the charger, since the radio won't turn on without any battery
    even when i connect 4V to the battery connector of the radio, i get an error message, that a wrong battery is inserted

    does anyone have an idea, how this is possible?

  2. # ADS
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  3. #2
    Member Reputation: 130
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    2010-08-22
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    Default Re: ******** MTH800 without battery on charger

    Hi,
    You have to use or build a battery eliminator using old or dead battery, there is one-wire device used to identify accessory type.

  4. Thanks nintrew thanked for this post
  5. #3
    Junior Member Reputation: 14
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    2013-10-19
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    Default Re: ******** MTH800 without battery on charger

    The battery has an internal resistance which is detected by the radio as being "valid".

  6. Thanks bgtopic66, nintrew thanked for this post
  7. #4
    Member Reputation: 47
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    2012-12-29
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    Default Re: ******** MTH800 without battery on charger

    @-bup- i already thought about sniffing the datastream and programming a microcontroller to output the same data, when it is connected to the battery pins in the radio
    @nokiaman2002 if it is only a resistor, it would be easy to be done

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