CHARGING BATTERIES

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  • u552
    Junior Member
    • Aug 2008
    • 62
    #1

    CHARGING BATTERIES

    Hello from Madrid. Let me ask for your aid this nice snowy and chilly moorning about the power source for my SCALE SHIPS'S AKULA II: I'm going to use a 12 Volts, 16 Amp /hour composed by ten 1,2 V; 1600 mAmp /hour, like Wheelerdealer did for his. My doubt is about charging current and charging time. What amperage and how many time.
    Thank you in advance for your aid.

    J.C: Jorquera.
    Tags: None
    • bill harris
      Junior Member
      • Sep 2009
      • 54
      #2
      Re: CHARGING BATTERIES

      You're using 1600mAh NiMh cells? They should be charged using a charger for NiMh batteries, which is designed to "peak detect" the battery charge cutoff. This will assure consistent and safe battery charges. Otherwise, charge at 1/10C (ie, 1/10 of 16 AH) or no more than 1.6 amps for ***15 hours***, as a general rule of thumb.

      Wrong!!!! One hour or so at 1/10C is correct. I was thinking "overnight trickle charge". Thanks, SubCulture.

      --Bill

        Comment

        • Guest
          #3
          Re: CHARGING BATTERIES

          1.6 A for about 1 hour, Bill, surely.

            Comment

            • bigdave
              Junior Member
              • Feb 2003
              • 3596
              #4
              Re: CHARGING BATTERIES

              Actually Andy I never charge my NiMh batteries at more than 1C or above unless I have too.
              I have found they do not take high current charges as well and Nicad's or Lipo's.
              You will not hurt them to do so but they will not take as high a charge capacity so run times are shorter.
              A least that is what I have seen. BD.
              sigpic"Eat your pudding Mr Land"
              "I ain't sure it's pudden" 20K

                Comment

                • Guest
                  #5
                  Re: CHARGING BATTERIES

                  Neither do I. 1.6A is 1C.

                    Comment

                    • bigdave
                      Junior Member
                      • Feb 2003
                      • 3596
                      #6
                      Re: CHARGING BATTERIES

                      I know that. Ha!!
                      Even 1C is high for some NiMh.
                      It is usually OK for the low MA batteries like 1.2A down but higher output cells start to get upset!!
                      I have some 2.5A sells I use in my Gato and if I use 2.5A or 1C they time out quick on a charge.
                      If I use say 500MA to charge them they will take the entire 2.5A charge.
                      Weird!! I know!
                      Have a great X-Mas holiday my friend!! BD.
                      sigpic"Eat your pudding Mr Land"
                      "I ain't sure it's pudden" 20K

                        Comment

                        • u552
                          Junior Member
                          • Aug 2008
                          • 62
                          #7
                          Re: CHARGING BATTERIES

                          I don't know now if they are NiMh or Nicad (just came down from my "shipyard" a moment ago and haven't checked it) Anyway, thank you all for your messages. I'll make different tests and see.
                          J.C.

                            Comment

                            • skip asay
                              Junior Member
                              • Feb 2003
                              • 247
                              #8
                              Re: CHARGING BATTERIES

                              "12 Volts, 16 Amp /hour composed by ten 1,2 V; 1600 mAmp /hour"

                              Actually, this is NOT "16 Amp" but rather 1.6 Amp. There's a big difference. Charging at the C/10 rate (recommended) would mean 160 mAh charging rate.

                              Skip Asay

                                Comment

                                • u552
                                  Junior Member
                                  • Aug 2008
                                  • 62
                                  #9
                                  Re: CHARGING BATTERIES

                                  Yes, that's right; excuse me by the mistake and thank you for message.

                                    Comment

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