Re: Automobile Cell Phone Charger RFI
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Dennis Smith
Many chargers for mobile phones have sensing circuitry and a data circuit to charge at full speed, without the corrected signal the phone will not allow a charge over a small amount, the signal needed for Apple devices is different from many Android devices as far as I am to establish. this is why some multi-port chargers often have ports specifically for indicated for Apple devices and Android devices, often appearing to perform poorly when the wrong port is used. I have in one example an Android phone that will 2/3 charge in 10-15 minutes from nearly dead and fully charge in 30 minutes from a good quality fast charger, but my 90W 6-way charger with ports marked Apple and Android and one specifically marked for Samsung/Huawei, that on certain ports doesn't charge anywhere as quick except from one port, however my GF who has loads of Apple devices finds the same port doesn't charge her phones at all, but the others do. (the port that doesn't charge is supplying current, but only enough to keep her phone powered neither using the battery power, nor charging it. The switching circuits in good quality chargers are often regulating the drawn current and helping to prevent overcharging causing either phone damage or worse an explosive fire. So just regulating the voltage and making several Amps available to the phone to use when and if needed, just won't work as you might expect. So, making a power supply for a mobile phone to drop 12V to 5V might work for older phones quite well, a newer phone will charge at a less than optimal speed. Dennis Smith M1DLG
On Fri, 31 Aug 2018 at 00:19, doug <dmcgarrett@...> wrote:
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