How can we say charger's output is 5V and 2.1A without giving resistance?
423
Choosing power supply, how to get the voltage and current ratings?
2268
Question regarding use of low voltage high current outputs
134679
How do I calculate the power rating for zero-ohm resistors?
67046
Is it OK to reduce the charging current for a Li-ion 18650 battery?
65365
How does USB Power Delivery work with voltages above 5V without damaging 5V peripherals?
67448
Can I use a charger with more output amperage than the device needs?
20994
Input power rating on power supplies - how does max amp draw apply to 220V
74913
What's up with the operating voltages 5 V, 3.3 V, 2.5 V, 1.8 V, etc.?
32346
How to get 20 V from a USB-C charger?
36841
Generating high voltage (100V+) from 5V USB supply
108301
How much power does a cell phone charger actually use?
23833
Can I use a power adapter with more current but lower voltage on another laptop?
81099
Laptop charger leaks AC while giving DC voltage at the same time. How?
40711
Getting higher power output by using more resistors
142221
What is the ideal way to handle data pins D+ and D- on a USB power adapter to be compatible with fast charging on devices?
125652
Double-Subscript Notation for Voltages
25819
Equivalent Resistance?