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16152Re: [RoboMower] Possible battery issue? - RL1000

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  • David Christopher
    Jun 27, 2009
      I finally got myself a voltmeter, and with the mower connected to the dock,
      the charger gave me a reading around 24. Taking the battery pack out of the
      mower, each of the two batteries registered around 12 (they are not well
      charged -- which is my problem). Not sure what else to do here, I've
      checked everything else, connections seem ok, etc.


      On Mon, Jun 15, 2009 at 4:54 PM, Danny Miller <dannym@...> wrote:

      > YES. There is an issue.
      > That is the UNLOADED voltage that the charger puts out. An operational
      > battery electrically connected to the charger would drag the voltage
      > down to probably 28.4v as an absolute maximum when fully charged.
      > Normally, I'd expect that starting from a battery at 23.1v, putting it
      > on a charger would yield a voltage in the 24v range at first and the
      > voltage will gradually rise to the 28v range over a course of hours.
      > Either the battery has a bad connection from the batt to the charging
      > contacts, or there is a bad connection inside the pack, or there's a
      > problem inside the charger itself. Or the battery could be bad, that is
      > normally the case, but since you replaced them I would tend to discount
      > this possibility.
      > Danny
      > David Christopher wrote:
      > > Thanks for the help guys -- I will check all the connections, steel
      > > connectors, etc -- have not done so yet. I also (unfortunately) don't
      > have
      > > a voltmeter, so I will go pick one up at Radioshack hopefully today.
      > >
      > > In the meantime, I did just look at what the controller said (while the
      > > mower was still docked) -- it said:
      > >
      > > Battery Voltage: 23.1
      > > Charging Voltage: 33.6
      > >
      > > Do either of these numbers indicate any issue?
      > >
      > > Thanks
      > > Dave
      > >

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