Here is how to do it: Shut down your laptop and disconnect the AC adapter. Remove your laptop battery, press and hold the power button for 30 seconds and then release the power button. Put your battery back in and … Continue reading →

So, yes, you can connect any type of USB port to any other. But the power limitations of some power sources may not be sufficient to charge it, or to charge it while using, or may only allow for very … Continue reading →

But if it seems too cheap to be true, it probably is. You may save money in the short-term, and it might temporarily save you if you’re desperate, but you’ll eat the cost on those cut-rate cables eventually—because cheap chargers … Continue reading →

2. How to charge your laptop in a car Turn on your engine. Plug the car charger into your vehicle’s charging port (you might not even need a car charger since many newer vehicles have USB ports you can plug … Continue reading →

While there’s no official way to check if your charger is fast charging, here are a few things to keep in mind: iPhones are hard-coded to stop fast charging once the battery reaches 80%. Fast charge only kicks in when … Continue reading →

MagSafe’s hardware implementation with iPhones Unlike the Apple Watch Magnetic Charging Cable, which is one meter long with a roughly one-inch-diameter magnetic puck at one end, the iPhone’s MagSafe Charger includes a meter of cable and a magnetic puck with … Continue reading →

Apple brings back the MagSafe connector — MagSafe 3 Apple sure loves taking us on a rollercoaster of connectivity. The new MacBook Pro computers are power-hungry enough that the USB-C connectors the MacBook line has been relying on for a … Continue reading →

Basics: Picking Resistors for LEDs Power Supply Voltage LED Color Resistor (rounded) 4.5 V Red, Yellow, or Yellow-Green 39 Ω 4.5 V Blue, Green, White, or UV 51 Ω 5 V Blue, Green, White, or UV 68 Ω 5 V … Continue reading →

it changes the Alternating Current from your wall into 9 Volts of Direct Current. What is 9V DC battery? The nine-volt battery, or 9-volt battery, is a common size of battery that was introduced for early transistor radios. It has … Continue reading →

Figure 1. Analog switch lowers relay power dissipation. Table 1. Power Dissipated By Relay. Voltage Current Total Power Dissipation 5V (normal operating voltage) 90mA 450mW 3.5V (pick-up voltage) 63mA 221mW 2.5V (circuit of Figure 1) 45mA 112mW How much current … Continue reading →

There’s no proof that computer use causes any long-term damage to the eyes. But regular use can lead to eye strain and discomfort. Do laptops ruin eyesight? Myth: Staring at a computer screen all day is bad for the eyes. … Continue reading →

Complete these steps Open the back cover of the Nintendo Switch Dock. Connect the USB plug from the Nintendo Switch AC adapter (model No. Connect one end of the HDMI cable into the bottom terminal of the dock labeled “HDMI … Continue reading →

Nope. The simple reason is this: a battery being charged is subject to a voltage higher than that of the battery’s voltage. That’s basically why the current flows from charging circuit into the battery, rather than vice-versa. If you put … Continue reading →

Nothing will happen. Both 5V are typically connected to each other anyway as they branch of the same 5V regulator of some sort. Need 2 500mA usb ports? Use a 1A 5V regulator. What happens if you plug a USB … Continue reading →

The Dell jack did not fit into the Lenovo socket. While you work on such power supplies, even if this is low voltage dc, there is high current. Shortening the dc jack may lead to demage of the power supply … Continue reading →