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6

This is indicative of poorly designed/ defective piece and best replaced ASAP. From bwDraco's answer on Why do some AC adapters and power supplies generate a whining noise, and what can I do about it? (emphasis added; missing text denoted by "....") Most modern AC adapters are switched-mode power supplies. The internal switching frequency of an SMPS is ...


5

Good question and to give a definitive reply is not possible since OEMs use different battery charging algorithms both at hardware level and OS level. Details of these are deemed "proprietary" and not available on public domain. By way of providing the background to understand: Battery Charging circuits have a dedicated "Power Management IC (PMIC) to take ...


3

When you are switching to a different charger from What is OEM supplied, things to bear in mind: Type of battery (not really relevant these days as most batteries are Li-Ion or Li-PO . Both have sane charging characteristics. Your battery is Li-PO). Battery type dictates charging / charger features Voltage This is critical and never use higher rated ...


3

Fast Charging can be achieved in two ways Hardware based Charging (including Chargers and Chip set enhancements such as Qualcomm Quick Charge 2.0 Kernels (including kernel tweaks) capable of increasing charge rate whether it is USB or wall outlet charging There is a fictitious way or a myth using apps: There is NO way for an app to over ride the device ...


2

Excessive Heating of battery is a typical, inescapable effect of using " fast or rapid " chargers. Reason behind this is the charging rate. Normal charging uses 0.5 to 0.8 C (C is the charge rate) whereas fast charging uses anything between 1 to 3C. In simple words, this is pushing more current to charge faster. Heat produced is related to Power and governed ...


2

First part of your question How do fast Chargers work Firstly one needs to understand C-rate or charge rate. Quoting from the linked article C-rate is a measure that governs at what current a battery is charged and discharged. At 1C, a battery rated 1,000mAh charges at a current of 1,000mAh. In an ideal world the battery would be fully charged in 60 ...


2

First of all, I would like to thank everyone who helped me understanding what can be the problem exactly; I am posting it as an answer because this is what solved my issue. The problem was neither with the charger nor with the USB cable. The real culprit was an extension cord which was offering very high resistance probably. Since my socket is at a ...


1

Voltage is not a good indicator normally of State of Charge (SoC) for Li Ion batteries, since the battery can show higher Voltage but not hold charge. Graph 2 highlights the relatively flat Voltage curve, compared to SoC drop Voltage of a fully charged battery should be 4.2V (see table 2). Seeing your comment on battery voltage being less, after 2 days ...


1

Hardware is not "capable" to decide charging rate based on "newness" or otherwise of cables In all probability, USB cables you are using are of poor quality, wrong length and thickness What I would suggest: Google for "24 awg micro USB cables Less than or equal 2 meter length and purchase from reputed vendor Why these specs for USB cable? Long ...


1

Standards USB standard 3.0 in lays down standards of 10 W: 5 V, 2 A  for smartphones and tablets Battery Charging Revision 1.2 lays down " standard for establishing the proper way to charge a battery from a USB port " American Wire Gauge (AWG) is a reference for thickness of cables. In this system, larger numbers indicate thinner wires. USB specification ...


1

You can try these solutions, which directly address what you are trying to achieve (may not work on all devices) adb commands from ADB Useful Commands Adb shell echo 0 > /sys/class/power_supply/battery/charging_enabled (1 to disable; 0 to enable) adb setprop-persist Disable USB charging If these methods don't work or you want to explore more ...


1

Yes. There is a relation and the explanation is little long Quoting from What is C Rate?, C Rate or Charging rate is defined as C-rate is a measure that governs at what current a battery is charged and discharged. At 1C, a battery rated 1,000mAh charges at a current of 1,000mAh. In an ideal world the battery would be fully charged in 60 minutes. At 1C, ...


1

Battery calibration is a myth and definitely will not help you in any way. For details see my answer Bought a new battery. Do I need to calibrate it 3C Toolbox (and maybe other apps, not sure though ) read the battery information from the ROM files and not from the battery you have. This I learnt when I sought a clarification from the developer, when the ...


1

I've done a little research on this (well I read the Wikipedia article on USB) and it seems that for fast charging there are two standards: the Apple one, and the non-Apple one. So yes, the two ports on your portable battery are different. The real question is - does it matter? My experience is that some devices don't care which socket they are plugged ...



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