On Mon, Sep 28, 2015 at 9:09 PM, Sergey A Dryga wrote: > I am either missing something or this is "snake oil". > The image shows 1150mAh battery. They say 1 min gives 50% capacity > 1.15Ah *0.5 =3D 0.5525 Ah or 0.5525 * 60 A for 1 min =3D 33A charging cur= rent. > And that is given a 100% efficiency! > That would require some very serious charging port The cell* (battery) in my old, small phone is 1460mAh, checking the specs of the latest phones, they have cells in the 2500mAH to 2900mAh range - with a quick search I can't find any modern (smart) phone with a cell smaller than mine. So showing a 1150mAh cell (and a 800mAh one) is disingenuous at best and has the alarm bells ringing even before doing any calcs. Their illustrated cell is 4.255Wh and a standard charge port is 5V, so you'd only need 25.5A also assuming 100% conversion efficiency. Or I suppose you could have a 60V charge port which would only need ~2A >:) The Tesla charging claim is even more intriguing - some commentary here on the cable issues involved with a 5 minute charge for that: http://insideevs.com/tesla-says-sub-10-minute-supercharging-is-possible-we-= doubt-it/ - they also mention the heat issues involved in charging at that rate. The efficiency will in reality be way less than 100% for the phone, and even 80% total efficiency means you have 32W to get rid of (for their illustrated cell), which seems like quite a bit in that size package. The apparent failure to have thought through these issues isn't very promising for the tech. Though I suspect a lot of it is poor journalism, I also suspect that whilst the tech is probably genuine they currently only have this working in the lab on a very small scale, and are busy blowing smoke. Chris * yes I know standard usage is battery, and it feels kind of awkward calling it a cell, but then it seems wrong to call it a battery on a tech list --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .