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1300kJ/kg Battery - from the Too-Good-to-be-True Newsdesk

Posted by Andrew Rabbitt on April 28, 2014 at 5:01pm

JUMPR-Necessary_Tool_large.jpg?v=1397601007This smartphone-sized pocket battery is being marketed for emergency starting of cars with flattery-battery-syndrome, but if the manufacturers specs are believable it would make a fantastic power pack for quads etc.  More than twice the energy density of typical hobby-grade LiPos (typically <600kJ/kg) and with a good punch of the current to boot! (50C, allegedly!)

At only $99.99 ($69.99 for pre-sale purchase - see website) it's not bad value compared to the lower energy-density Panasonic NCR18650B cells.

FWIW

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Comments

  • Quadzimodo April 29, 2014 at 8:55am

    A few weeks back a mate, who builds cafe racers from old 70-80s japanese sports bikes, mentioned that he was considering purchasing one of these and one of these.  What he was after was a battery that could be completely concealed from view.

    I suggested he save $70 straight away by purchasing one of these, and pointed out that the Ballistic EVO2 range of batteries consist of a 4S1P, 4S2P, 4S3P, 4S4P, etc array of these (or simular) in what appears to be a high impact polypropylene case.

    After some discuss we decided to grab one of these to test in his application, as it best fit the area we had to work with (and could be cased easily).

    State of charge will be permanently monitored by one of these (current consumption is negligible) in order to ensure that the DOD never exceeds ~50%, based on internal resistance of battery, so to limit charge to ~2C.  Provided cell shape is checked and cells balanced periodically, it should suit the application.

    Difference in cost is $84.81 verses $219.90.

    I have however told my friend to be extremely careful using hobby grade batteries in such an application and forewarned him of all possible outcomes.  The battery will be properly protected from heat sources and risk of puncture and located in such a way that should it become an incendiary device, the problem can be isolated.

    Still a massively different risk profile to using equivalent lead acid.

  • Pedals2Paddles April 29, 2014 at 4:32am

    Smells like BS to me!

  • Quadzimodo April 29, 2014 at 4:18am

    I would not retail a product like this to the end user.  Too much to go wrong.

  • Quadzimodo April 29, 2014 at 4:17am

    Interesting that there is no arc when paralleling across lead acid.  This suggests that here is little difference in terminal voltage (ie - lead acid is above 12VDC).  If there is no difference in terminal voltage, then the lead acid is not flat.

  • Project Nadar April 29, 2014 at 2:33am
    Steve the battery you have linked will not suffice for our hubgry energy needs. To little contant current. As for the smart phone sized battery indeed specc are overwelming but actual tests are missing. I could also make a funcy site advertising a 20A battery weighing 200g and all of you here would be throwing parties around it. I want to see a person actually flying it and I am gonna contact them personally to ask more info and propably a sample on a distributor price to prove them right or wrong. If they are right all we need to do is a serial connection and voila 6s at 6A weighing 500g. Another question is how much charging c rate can the battery accept.
  • Scott Powell April 28, 2014 at 8:45pm

    The large alligator clips would weigh down the quad/plane a fair bit though :-)

  • Austin Suhler April 28, 2014 at 5:56pm

    Wait a minute, what? I mean......what? Did we just see a 7oz lipo start a car? What I want to know is how they charge this from a 5V USB charger..... 

This reply was deleted.