Tip Laptop Power Adapter Cable DC 7.4mm x 5.0mm Female to 4.5mm x3.0mm Male Charging Connector Power Converter Cable DC Jack for HP Notebook Adapter Replacement Power Cord(15.8cm/2Pack)

I had several power supplies that were for a previous HP computer, but did not fit my new computer. The amperage and voltage ratings for the supplies and the computer were the same, but the plug was different. I ordered these adapters and they allowed me to use the existing power supplies with my new computer, which saved me a great deal of money versus buying additional power supplies. I have used these adapters for several months now, and they have performed flawlessly. I would definitely recommend this product.

There are two types of connectors of Dell power. I bought this adapter so that I don't need to buy a new power.

This adapter came up when I searched for Dell 7.4 to 4.5mm adapter, but it is not compatible with Dell, only HP. This is due to it not passing through the middle pin which allows the adapter to tell the laptop how much power it can provide. Both brands use the middle pin for this, but they do so differently. This adapter has HP identification in it for 65w to prevent too much power from flowing through it if the brick it is used with can provide more than 65w. This obviously doesn't work with Dell laptops. The 65w setting can also be a problem if you use a brick than can supply less than 65w in which case the laptop will try to draw too much power potentially damaging the brick.

Fits perfectly, able to charge my hp laptops with existing power blocks I already had.

These were a great find. I have a newer HP laptop and an older one, and this enables me to use the same power adapter for both. It saved me from having to buy a universal power adapter or having two power adapters out all the time.

The exposed metal (see red arrow) is a short circuit vulnerability. The laptop power cable barrel plug should be completely insulated when the 7.4mm x 5mm adapter is attached.

Works great

Although this can power a Dell Laptop by connecting a Dell Laptop Charger with a 5mm male to a Dell Laptop with a 3.00 mm female connector, this AAOTOKK Tip Adapter Cable cannot charge a Dell laptop because the third center pin wire doesn't not have any continuity which is required by the Dell Laptop circuitry to recognize a Dell Laptop Charger.