What Do I Need to Know About Power Adapter Chargers?

An AC Adapter is a type of external power supply. It is often enclosed in a case that is similar to an AC plug. An AC adapter is also described as a charger. They are used with electrical devices that need power but do not have internal components required to derive power. Examples of Lenovo laptop AC adapter chargers include:

  • Laptop Lenovo charger 45W USB-C Type-C AC power supply adapter AD045G4
  • Lenovo 45W EU USB-C power adapter for yoga 910-13IKB 80VF 80VG
  • 45W USB C power adapter charger for Lenovo Miix 720 Yoga 910 910-13 910-13IKB

How do I choose a replacement power adapter charger for my laptop?

  • Find your laptop's model number - The model number is important because of compatibility. To locate it, check the bottom part of your ThinkPad or PC. There should be a sticker. If you do not find the serial number here, check the user manual that came with your laptop. The other option is checking under the laptop's system properties.
  • Wattage requirements - Electrical power is measured in watts. Knowing the amount of electrical power your ThinkPad needs is important when selecting a replacement AC adapter. Using the wrong one can damage your computer. The required voltage is usually indicated as DC voltage.
  • Find a compatible charger - Look at the list of compatibility that comes with replacement adapters. One of the critical things to look for includes the AC adapter charger power cord. The manufacturer and part number should be included.
  • Another feature to consider is whether the charger has a slim tip that matches with your PC.

How to repair a Lenovo power charger?

  • Get the right tools - To repair it correctly, you will need some tools. These are a soldering iron, vise, wire cutter, flathead screwdriver, hot glue gun, super glue, utility knife, and electrical tape.
  • Open the power brick and remove the enclosure - Secure the power brick in the vise and use a knife to cut through the outer plastic shell. Once you cut through the entire seam, pry off the top of the plastic enclosure using a flathead screwdriver. Separate the power brick from the bottom of the plastic enclosure and set it aside for later use.
  • Desolder then solder the low voltage cable - There are two connections to desolder. Note the positioning of the wires, then use a soldering iron to desolder the low voltage cable from the power brick. Strip about one inch of the cable jacket of the low voltage cable. Insulate the two conductors found in this cable using electrical tape. After that, solder the good section of the low voltage cable back to the correct pad on the power brick.
  • Assemble the enclosure, test, and use - Enclose the power brick in the plastic enclosure using super glue. You can add strain relief using the hot gun glue. This ensures the power brick is securely enclosed. After doing so, use the multimeter to check the voltage of the power plug. The reading should be close to the nominal voltage rating of your power brick.