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Questions and Answers for RescueMate 12-Volt Super Capacitor Jump Starter

Internet #303420093

Model #Kanga500A

  • Maintenance free: Never needs regular charging like lithium
  • Never touch it for 5-years and it will start your engine
  • Super safe, no fire hazards, lasts 10-years or more

Questions & Answers

13Questions
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Q:If it lasts 10 years or more why is the warranty only 3 years?
by|Mar 7, 2021
1 Answer
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A:  For the same reason the average car warranty is 3 years but we are quite certain most buyers expect the car to last longer than that, right? Refrigerator warranties are typically 1 year, even on this site (even for $3000 products), but still have only a 1 year warranty. We have one of the best warranties in this industry and we use the best components and manufacturing. I hope this answered your question.

by|Mar 17, 2021
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    Q:Your Reserve Capacity specification (500 Ah) must be a mistake, perhaps you mean 500 mAh. 500 A...
    by|Jun 8, 2020
    1 Answer
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    A:  Thank you for the question. You are confusing battery ratings with Super Capacitor ratings. We don't rate ours at 500 Ah, we rate at 500 Amps. Big difference! Batteries are rated by Amp Hours (Ah). Super capacitors are not. Amp Hours is an irrelevant spec for Super Caps (Ultracapacitors). The way this product works is by filling up the Super Caps with the residual energy in almost all flat batteries, then releasing it all at once to start the engine. We produce a solid 500 amps, unlike Lithium jump starters that advertise "1000 Amps" and barely even reach 500 Amps. We've done a lot of testing on many brands; all the same. Way over rated. Plus they need regular recharging (every few months) and last only a few years, and don't work in cold weather. Thanks for the question.

    by|Jun 10, 2020
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      Q:Can this device be used in a remote application where it is constantly charged by a solar panel? ...
      by|Feb 26, 2020
      1 Answer
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      A:  Yes this can be constantly charged with solar. The generator should be in good operational condition so it can start within the 10 to 15 seconds of cranking time or you'll have have to wait a few minutes for the super-caps to recharge. I'd recommend the RM1000 Amp. Current from the charging point won't be used during starting.

      by|Feb 27, 2020
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        Q:Does this charger/starter have "idiot proof" connectors? Will it give a warning or something if I...
        by|Feb 19, 2020
        1 Answer
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        A:  Yes! Reverse polarity protected and will give you a warning. This is one of the easiest and safest jump starters to use.

        by|Feb 19, 2020
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          Q:Will it start a vehicle that has the battery removed?
          by|Feb 10, 2020
          1 Answer
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          A:  Yes it will start a vehicle without a battery. We have a demo video titled "OzCharge RescueMate Super Capacitive Jump Starter – Malibu Boat Battery Disconnected" that shows this on a 350 cubic inch (5.7L) V8 engine. You can search for that. We've also demo'd it many times on a 3.7L Jeep V6. Both of these are with the 500 Amp version, not even the 1000 Amp.

          by|Feb 10, 2020
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            Q:How long will this capacitor hold its charge for 90% it's designed voltage? The answer will depend on the total capacitance, the peak voltage, and the internal leakage (shunt) resistance. Thank you for the technical answer.
            by|Nov 6, 2019
            1 Answer
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            A:  The RescueMate isn't designed for long term storage of charge, it is designed to take a small amount of energy and charge the capacitors quickly and then dump that to start engines. But to answer your question, perhaps a day or so to 90%.

            by|Dec 28, 2020
              2 found this answer helpful
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              Q:I first must thank you for persevering, because you are obviously not expert at electrical components such as batteries and capacitors and resistors, whereas I have a Ph.D. in Engineering and know what I'm asking about. Any capacitor, whether super or conventional can hold a charge for a period of time. Not as long as a battery, but still, for some period, depending upon its internal leakage resistance. I am thus asking, how long will this capacitor hold its charge, for say 90% discharge? This question is entirely scientific, legitimate and any knowledgeable person would understand it. If you don't know the answer, or if you don't understand what I'm asking, just say so. Please stop repeating your non-answer. I am not the one refusing to read!! Better yet, ask a more knowledgeable person to answer for you.
              by|Nov 4, 2019
              2 Answers
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              A:  Having earned a Bachelor of Science in Electrical Engineering and as a product design engineer for 100 products that went to market, yes I would consider myself an expert in many components, especially simple ones like capacitors & resistors. With that in mind, asume that this product will only hold the charge for 8 hours. RescueMate's biggest advantage is its capability to charge the Super Caps from extremely low Voltage batteries, filling them quickly with enough energy to start engines, typically 90 sec to a couple minutes depending upon how low the battery is. This is not designed to hold a charge for long periods, it just charges the Super Caps upon each use. Assume 8 hours after a full charge.

              by|Jun 28, 2020
                4 found this answer helpful

                A:  You sir don't know what you are talking about. I'm a BSEE that has designed products for the automotive industry for 30 years. I designed the touch screen for Harley Davidson's first touch screens....a 6 year program. I, sold the touch screen programs to Chrysler corporation for 6 years for their 8.4" touch screens, 1.5 million units per year. Ford....8 years of touch screens and electronics. Peterbilt & Freightliner trucks for 6 years, McLaren, Subaru and more. I personally designed products for both after market and OEM customers. My company sold over $60 million dollars per year to OEM's in the past few years. Don't you dare insult me or our product and how it works. We have have had virtually NO RETURNS since we have introduced this product. It obviously isn't right for you. Go away. Don't buy it. It works. We have a 3 year warranty to back it up, we don't want to argue. Find another forum to argue with people. Our product works, and works absolutely great.

                by|Dec 28, 2020
                  6 found this answer helpful
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                  Q:This is the third time I'm asking the same question: How long will this device hold a charge AFTER it's been charged. I don't understand the difficulty here. Why is the responder ignoring my question and repeating the same answer, like a robot? ONCE FULLY CHARGED, HOW LONG DOES THIS DEVICE HOLD A CHARGE SUFFICIENT TO JUMP START MY CAR??????????
                  by|Nov 2, 2019
                  4 Answers
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                  A:  It is not designed to "hold a charge". It is designed to create a charge sufficient to jump your vehicle, then it needs to be charged, again. It doesn't take very long to do so. It is meant to charge to a certain degree, give you a countdown to the time you need to use it, and then it needs a matter of seconds to charge up again, in order to once again be useful. It isn't a battery, so it doesn't exactly store energy. If you fail to start your car as soon as the countdown completes, it will need to be "charged" again in order for it to be useful. This charge doesn't take very long.

                  by|Jul 13, 2020

                    A:  YOU OBVIOUSLY AREN'T READING OUR NUMEROUS RESPONSES. PLEASE READ THIS. A straight forward answer then! This product uses advanced Super Capacitor technology which is totally different from batteries, such as Lithium. Lithium you have to charge ever few months or they don't work, plus they don't work in cold temperatures (below ~0 degrees F) and definitely don't like high temps (fire hazards above ~130F). The RescueMate charges itself each and every time off the very small amount of energy remaining in most flat batteries, charging the Super Capacitors typically in 60 to 90 seconds and then releasing the total current at one time, starting the engine. Hence, it is completely different from a battery; it doesn't hold the charge for days/weeks/months, but instead it "fills itself up in approximately 60-90 sec. This way it is always available, never needs regular recharging, can jump start over & over & over if your engine doesn't start right away. Also, Rescue-Mate lasts 10 years where Lithium lasts ~3 yrs. Hope this helped. There are many YouTube videos on the Rescue-Mate showing operation and Home Depot is the place to buy it.

                    by|Apr 23, 2021
                      6 found this answer helpful

                      A:  probably about two weeks max usable

                      by|Dec 18, 2020
                        2 found this answer helpful

                        A:  Per the manual, at page 5, it will hold a charge "no more than a few days." But that's irrelevant for most purposes, since the intention is that you would charge the product immediately prior to using it. And as long as your car battery isn't dead as a doornail, it will trickle charge the product, within at most a few minutes, to the point that the product can discharge sufficient amps from the stored up charge to start the car, and presumably the car will then resume charging the onboard battery. I sure hope that helps, because this argument was going nowhere.

                        by|Dec 28, 2020
                          4 found this answer helpful