Battery types for model subs

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  • salmon
    Treasurer
    • Jul 2011
    • 2342

    #31
    Good charger, so I think that can be taken off the troubleshooting checklist. No balancing cable brings concern to me. You have some diagnostic steps missing because we cannot check the state of your batteries or individual cells. Well let us see what you discover this weekend.
    If you can cut, drill, saw, hit things and swear a lot, you're well on the way to building a working model sub.

    Comment

    • JWLaRue
      Managing Editor, SubCommittee Report
      • Aug 1994
      • 4281

      #32
      How does one waterproof the balance charge wires?

      Well.....my solution was to place the entire battery into a custom-sized "dive module" that has only two end cap penetrations. Those are for the positive and negative leads. Inside I wire a connector to the end cap so that I can change out batteries by simply opening the dive module and disconnecting the battery....then remove and replace.

      Externally, as in the wet space, all wire connectors are waterproofed to prevent galvanic corrosion.

      -Jeff
      Rohr 1.....Los!

      Comment

      • corsaire
        Junior Member
        • Mar 2003
        • 166

        #33
        Originally posted by salmon View Post
        Good charger, so I think that can be taken off the troubleshooting checklist. No balancing cable brings concern to me. You have some diagnostic steps missing because we cannot check the state of your batteries or individual cells. Well let us see what you discover this weekend.
        I have the Akula 1/96 scale, the prop is rather small, almost 2 inch diameter. I'd like to get a Lipo with a wire for balance, but the challenge will be how to waterproof it given that my battery stays out in the free flooding area of the bow. I think the battery might be just OK, I really pushed the motor hard last weekend trying to get it out of the mud. I'll know for sure this Saturday. Right now battery has been "stored" until Saturday.

        Comment

        • JWLaRue
          Managing Editor, SubCommittee Report
          • Aug 1994
          • 4281

          #34
          Do you have access to an ammeter?

          -Jeff
          Rohr 1.....Los!

          Comment

          • corsaire
            Junior Member
            • Mar 2003
            • 166

            #35
            Originally posted by JWLaRue View Post
            Do you have access to an ammeter?

            -Jeff
            You read my mind Jeff :-) I'll stop at my work's nearby Home Depot tomorrow to get one. Do you have a good one in mind you might recommend?

            Comment

            • JWLaRue
              Managing Editor, SubCommittee Report
              • Aug 1994
              • 4281

              #36
              Going to Home Depot is going to be expensive. Looking at their web site, the ones they list are far more than would really be required.

              Do you have a Radio Shack in your area that's still open? Or perhaps a local hobby store?

              -Jeff
              Rohr 1.....Los!

              Comment

              • corsaire
                Junior Member
                • Mar 2003
                • 166

                #37
                Originally posted by JWLaRue View Post
                Going to Home Depot is going to be expensive. Looking at their web site, the ones they list are far more than would really be required.

                Do you have a Radio Shack in your area that's still open? Or perhaps a local hobby store?

                -Jeff
                Didn't you know? Radio Shack is no more, out of business. How much you think is a well priced multimeter for our use?

                Comment

                • JWLaRue
                  Managing Editor, SubCommittee Report
                  • Aug 1994
                  • 4281

                  #38
                  Wasn't sure of all the stores had actually closed....but yea, I knew they were going out of business.

                  For our purposes, I'd think no more than $20.00 for an ammeter would suffice.

                  -Jeff
                  Rohr 1.....Los!

                  Comment

                  • southern or
                    Junior Member
                    • May 2014
                    • 484

                    #39
                    I got mine at Ace. It wasn't too bad in price (I think $15-20) and it's analog which I prefer.

                    Comment

                    • Ralph --- SSBN 598
                      Junior Member
                      • Oct 2012
                      • 1417

                      #40
                      Not all Radio Shacks were closed.
                      1700 closed out of 5000 under the bankruptcy agreement.

                      Check your area.
                      ====================
                      $9.99 multimeter

                      $5.99 multimeter

                      $9.97 multimeter

                      Comment

                      • southern or
                        Junior Member
                        • May 2014
                        • 484

                        #41
                        Originally posted by Ralph --- SSBN 598 View Post
                        Not all Radio Shacks were closed.
                        1700 closed out of 5000 under the bankruptcy agreement.

                        Check your area.
                        ====================
                        $9.99 multimeter

                        $5.99 multimeter

                        $9.97 multimeter

                        Those are becoming phone stores though.

                        Comment

                        • Ralph --- SSBN 598
                          Junior Member
                          • Oct 2012
                          • 1417

                          #42
                          Did you try the links to the multimeters?
                          One is Sears
                          One is Harbor Freight and the bottom on is Radio Shack.
                          There are others like Ace hardware.

                          I guess I could have put the names with the pricing.

                          Comment

                          • JWLaRue
                            Managing Editor, SubCommittee Report
                            • Aug 1994
                            • 4281

                            #43
                            Ahh! I forgot about Harbor Freight! I have one from there (too) and they work fine.

                            -Jeff
                            Rohr 1.....Los!

                            Comment

                            • Ralph --- SSBN 598
                              Junior Member
                              • Oct 2012
                              • 1417

                              #44
                              I am use to having an edit button.
                              So, instead... the prices are links to the pages where I found various multimeters.
                              Just click on the prices to bring them up.
                              Three prices and three different vendors.

                              Comment

                              • JWLaRue
                                Managing Editor, SubCommittee Report
                                • Aug 1994
                                • 4281

                                #45
                                I have one of those $5.99 Harbor Freight multi-meters. Works just fine.

                                -Jeff
                                Rohr 1.....Los!

                                Comment

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