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- charging - USB-C power negotiation - Electrical Engineering Stack Exchange
We designed a power board that can deliver 5V and 3V3 Those two voltages are provided by two boost buck converters that can deliver 3A each The board accepts power from a USB-C socket which is
- 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?
How do I calculate the approximated time for the Charging and Discharging of the battery? Is there any equation available for the purpose? If yes, then please provide me
- How can charging current be understood intuitively?
The charging current I’m talking about would be the one between un-shorted phases and ground when there is a short to ground in one of the phases in a distribution network or facility I'm not talk
- Can I charge a NiCd battery with a NiMH charger?
Trickle charge is fine as long as you keep an eye on the charge time, and fast chargers for NiMh will also detect a full Nicad and shut off the charge cycle According to @Lorenzo Donati's answer above, it's the other way around that's dangerous, i e charging NiMH with NiCad, because NiMH batteries will get hot
- How can I retrofit an LED to indicate charging? - Electrical . . .
I'm wondering how you would go about adding a simple circuit to indicate charging is taking place My only idea is to add an LED with a current-limiting resistor in parallel with the battery so the LED turns on at about 18V When the charger is plugged in, the 18V will charge the battery and a small current will light the LED
- lithium ion - If Li-Ion battery is deeply discharged, is it harmful for . . .
Yes, it is dangerous to attempt to charge a deeply discharged Lithium battery 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
- Charging lead acid batteries in series - Electrical Engineering Stack . . .
1 This is a problem when series-charging lead-acid batteries and it is generally not recommended The battery's condition is dependant on the specific gravity of the sulphuric acid electrolyte Of course the 6 individual 2V cells in each battery share the same electrolyte which is why they can be charged in series but separate batteries can't
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