Install Free Gold Price Widget!
Install Free Gold Price Widget!
Install Free Gold Price Widget!
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- How does a USB C port provide the power to charge laptops?
Coupled with higher voltage, that gives a lot higher charging power All in all, I guess that the laptops will as well charge with 5V (on USB A charger), just far slower And based on what I saw from Apple for their new Macbook, the charger is 29W, so most likely a Profile 3 (a bit under spec), it seems then to be only 12V
- How to Calculate the time of Charging and Discharging of battery?
Charging of battery: Example: Take 100 AH battery If the applied Current is 10 Amperes, then it would be 100Ah 10A= 10 hrs approximately It is an usual calculation Discharging: Example: Battery AH X Battery Volt Applied load
- charging - USB-C power negotiation - Electrical Engineering Stack Exchange
For negotiating the power, USB C has an passive and an active standard Passive method With the passive standard, you use your microcontrollers ADC to read the voltage on both CC pins, and take the highest voltage (make sure to properly deal when VBUS is not yet active, so use a 22k resistor to prevent the microcontrollers ESD diodes from affecting the connection test from the charger)
- Can I charge a NiCd battery with a NiMH charger?
The importance of this difference is that it is possible to safely force very high rates of charging current into a Ni-Cd cell, as long as it is not overcharged The factor which limits the maximum safe charging current for Ni-Cd is the internal impedance of the cell, as this causes power to be dissipated by P = I 2 R The internal impedance is
- lithium ion - If Li-Ion battery is deeply discharged, is it harmful for . . .
Most Lithium charger ICs measure each cell's voltage when charging begins and if the voltage is below a minimum of 2 5V to 3 0V it attempts a charge at a very low current If the voltage does not rise then the charger IC stops charging and alerts an alarm \$\endgroup\$ –
- How do chargers with different output values work?
For example my laptop charger can output: 20V=3 25A, 15V=3A, 9V=2A and 5V=2A If I were to charge my power bank with it which accepts 5V=3A, 9V=2A and 15V=1 2A as input, could something go wrong? In this case if I were to plug in the power bank to my laptop charger how do I know that it's charging at the 15V=3A that it should and not at 20V?
- batteries - What voltage to charge a single NiCd cell? - Electrical . . .
Best results are gained by discharging to 1 V cell, then charging at constant current of 0 1 of the A-hr rating for 16 hours That is, if the cell is rated for 1 A-hr, charge at 0 1 A for 16 hours Peak cell voltage during this charge profile will be about 1 45 to 1 55 volts, which you can use to specify the minimum voltage compliance of the
- How can charging current be understood intuitively?
If one of the phases shorts to ground causing a ground fault, the charging current for the other two phases will flow through the ground fault (2) " Apparently the way to directly measure charging current in small ungrounded systems (in which the charging current value is under 10 A) is to short one of the phases to ground and measure the current
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