HP 19.5V Laptop Power Adapters & Chargers
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Finding the Right Laptop Chargers and Adapters
Like a lot of portable devices, laptop power cables are easy to lose. Because they are so useful for keeping laptop batteries topped up, it can also be very helpful to have more than one, for example one for home and one for the office. Choosing the right model makes it easy to keep your battery charged and your computer ready to use. However, picking the wrong one can damage your battery and your device, so there are a few considerations to be made.
Which Kind of Charger Do I Need?
- AC adapter chargers are designed to plug into a wall outlet. Household electricity is alternating current, but laptop batteries have to be recharged using direct current. This is why all laptop AC adapters have a rectifier built in to convert the electricity over to direct current.
- DC chargers plug straight into a DC power source. Often they are designed to plug into the dashboard power outlet of a vehicle. This can be even easier with some modern vehicles with their own USB outlets, as you can charge your laptop with DC current using a USB cable.
- Some devices are designed to work with both AC and DC power supplies. Typically these consist of a cable for DC charging, plus an optional rectifier that it can plug into. This is convenient as it allows you to recharge your device from a lot of different sources.
Which Features Should I Look For?
- Different chargers supply different voltages. The safest option is to use a charger that supplies the voltage that your laptop is rated for, which should be printed somewhere on it. Depending on the device, it may be rated for a range rather than a single figure. Using a 20V supply to charge up a 10V device could seriously damage the battery, while the other way around would lead to slow charging.
- Amperage measures how quickly electricity flows to the laptop. Again, to know what amperage to get, you will need to look at your device, which should show a minimum. Using a higher amperage DC or AC adapter will cause your device to charge faster, while one that is too weak can be damaged during use.
- Different manufacturers develop charging cables that plug into their devices in different ways. These are often not compatible. To ensure compatibility, it is often safest to choose a new cable that matches the original. For example, if you have an HP laptop, you might want to pick an HP AC adapter. This also helps to ensure that your new DC or AC adapter supplies electricity at an appropriate voltage and amperage.