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Re: BCD396XT Battery Charge Rate Draw Rate UPDATE

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  • Richard
    These batteries are designed for that. As a matter of fact they say they can charge at 1500 mAh max, which would mean a 90 minute recharge time to peak. They
    Message 1 of 6 , Feb 8, 2012
      These batteries are designed for that.
      As a matter of fact they say they can charge at 1500 mAh max, which would mean a 90 minute recharge time to peak. They require a charger capable of that.
      The LaCrosse 900 can do it.

      -R

      --- In BCD396XT@yahoogroups.com, "Mark Levine, D.C." <wb2eqe@...> wrote:
      >
      > Is it safe to charge 2500mah nimh at 1000ma rate?
      >
      >
      > ----- Original Message -----
      > From: "Richard" <rszkodzi@...>
      > To: <BCD396XT@yahoogroups.com>
      > Sent: Wednesday, February 08, 2012 4:54 PM
      > Subject: [BCD396XT] Re: BCD396XT Battery Charge Rate Draw Rate UPDATE
      >
      >
      > > Here is the update ...
      > >
      > > My LaCrosse Charger at 1000 mAh took 2.5 hours to charge and says that it
      > > needed to put back 2270 mAh back into each battery.
      > >
      > > These were Sanyo LSD 2500 mAh batteries. So that means at 3.5 volts on
      > > the unit the batteries have only ~230 mAh left.
      > >
      > > To put back 2270 mAh using the internal charge mechanism once the unit
      > > starts to beep would take 8.4 hours. Rounding to 9 hours for good measure
      > > and heat loss (minimal using LSD's) this is my new setting for the
      > > internal charges.
      > >
      > > Your mileage may vary. Hope this helps someone else.
      > >
      > > -R
      > >
      > >
      > >
      > > --- In BCD396XT@yahoogroups.com, "Richard" <rszkodzi@> wrote:
      > >>
      > >> I just wanted to post this for everyone, since it was not listed
      > >> anywhere, and after calling Uniden they did not have it, go figure.
      > >>
      > >> The Charge rate on the battery terminals when using NiMh mode is ...
      > >>
      > >> 275 mAh when the unit is turned off. Fairly consistent.
      > >> 265-270 mAh when unit is turned on and plugged in to power. This
      > >> fluctuates whether there is active reception in progress or just
      > >> scanning.
      > >> If the power is not plugged in the draw rate from batteries is 160-180
      > >> mAh. This fluctuates based on whether its scanning or receiving and
      > >> outputting the audio. Squelch and Volume will play a role here.
      > >>
      > >> I figured this out by putting a mutimeter in line.
      > >>
      > >> So if you have 2700 mAh Battery at zero charge in the unit, you need to
      > >> charge the batteries for ~10 Hours for a full charge.
      > >>
      > >> If you have other capacities just do the math. Keep in mind you are not
      > >> charging a battery from zero typically.
      > >> Here is a calculator ...
      > >> http://convert-to.com/491/recharging-rechargeable-nimh-nicd-batteries.html
      > >>
      > >> The unit starts to complain the battery is low when 3.5 volts is
      > >> registered.
      > >>
      > >> Note that the unit does not have smart charging capability. It charges
      > >> for as long as the Battery Charge setting is configured for. So the
      > >> default 14 hour is way too long for just about any battery on the market
      > >> today. Overcharging will kill the battery and over heat the
      > >> unit/battery. Plus unplugging the power and putting it back in will
      > >> start the cycle from the beginning.
      > >>
      > >> I am testing a new pair of Sanyo LSD Eneloop 2500 mAh batteries using the
      > >> Lacrosse 900 Charger. When the unit starts to beep at 3.5 volts I'll
      > >> recharge the batteries in the LaCrosse and post the total mAh put back
      > >> into the batteries. This will allow me (you) to set the charge rate
      > >> accordingly, if you wanted to charge the batteries in the unit on
      > >> occasion, when they register 3.5 volts remaining.
      > >>
      > >> -R
      > >>
      > >
      > >
      > >
      > >
      > > ------------------------------------
      > >
      > > Yahoo! Groups Links
      > >
      > >
      > >
      > >
      >
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