Your connection to the phone company consists of two copper wires. Usually they are red and green. The green wire is common, and the red wire supplies your phone with 6 to 12 volts DC at about 30 milliamps. If you think about a simple carbon granule microphone, all it is doing is mo...
or iPad to charge. And as Android users are learning, now iPhone owners will be asking them to borrow their chargers. You can even reverse charge the AirPods case with the USBC cable. And there you have it. This is what makes an iPhone, a device that's not just an object, but a...
Your connection to the phone company consists of two copper wires. Usually they are red and green. The green wire is common, and the red wire supplies your phone with 6 to 12 volts DC at about 30 milliamps. If you think about a simple carbon granule microphone, all it is doing is mo...
Another way to charge a MacBook without a charger is via a USB Type C cable. Type C is the mini-sized USB socket on newer Android phones and Apple’s iPhone 15, as well as new MacBooks. So, if you have a Typc-C charging cable, you can connect it to your MacBook. Not all...
To find the exact power rating for your device, check the charger that came with it or look in the device manual. The key thing to remember is watts (W) = volts (V) x amps (A). For instance, if a phone charges at 5V/2A, that equals 10 watts. ...
If you are on iOS, we also have aguide on how to check your iPhone's battery. Many codes are outdated when switching to Android 4.3 Jelly Bean and later Lollipop. In fact, with each new version, codes are removed and others are added. Not to mention the specific codes for certain And...
With a few AA batteries and $5 worth of parts, anybody can cobble together an emergency cellphone charger. Here's how to do it, and how to extend your charger-building skills to work on digital cameras, laptops and even power tools.
(5 watts @ 5 volts), which you can draw from a dedicated USB charging port on your PC (but these are rarely labeled) or with the right drivers. Generally, though, to get the fastest charge, you will need a wall charger or third-party connectors that trick your USB device i...
You’d get just under 3 charges for an iPhone 12. Input and Output Power banks and phones are smart enough to decide exactly how much power should be given and received. Say, for example, your phone has an input of 5 volts and 2 amps (5V/2A). If you have a power bank that ...
For testing the electrical output from a vehicle battery, the multimeter dial should be turned to the “20 volts” setting. But before the multimeter can be used, all surface charge from the battery must be removed to allow for an accurate reading. To do this, the headlights should be ...