#Accessories

Consumer Electronics

Wireless HDMI Transmitter and Receiver Kit: How to Send Laptop or PC Video to a TV Without a Cable

This kit exists to solve one specific problem: your computer is on the desk and the screen you want to use is on the wall, and running a long HDMI cable is not an option. You plug the transmitter into the source - a laptop, desktop, camera or games console - and the receiver into the TV or monitor, and the picture goes over the air with no driver to install. That makes it useful in meeting rooms, for presentations, and for wall-mounted TVs where running a cable would mean cutting into the wall. The three things that decide whether it works for you are resolution, the environment and content protection: check the maximum resolution and frame rate you need, remember that wireless links are sensitive to walls and interference from crowded Wi-Fi, and note that HDCP-protected streaming apps often refuse to display over these kits. Both dongles may also need a USB power source, so confirm what is in the box.

Consumer Electronics

Spot Welder for Lithium Battery Packs: 14kW / 2400A Double Super Capacitor - What to Check Before You Buy

If you are rebuilding a battery pack, replacing worn-out 18650 or pouch cells, or assembling your own e-bike or power-station battery, the welding step is where a cheap tool ruins good cells. This machine uses a double super capacitor design, which stores energy and releases it in one high-current pulse instead of relying on a heavy transformer, and the title rates it at 14kW with 2400A of welding current and a 6V digital display. Higher current is what lets you weld thicker nickel strip without burning through the cell, so check the strip thickness you plan to use and match it to the machine's settings. Before ordering, confirm what is in the box - welding pen, foot pedal and nickel strip are often sold separately - and whether your wall socket can handle the inrush. Ask the seller what the 6V specification refers to if it is not explained on the page.