Why can’t laptop power adapters be used interchangeably?

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This post was last edited by Thank goodness you're here on 2015-12-3 at 15:32. Laptop power adapters are not universal – have you ever encountered this situation? In certain situations, the laptop’s battery runs out of power suddenly, and since you don’t have a power adapter with you, there’s still some work left to finish, which is extremely frustrating and embarrassing. Some friends might try to use someone else’s laptop power adapter at this time, but it’s important to note that power adapters for laptops from different brands are not compatible with each other, at least for now. There are three main reasons why it cannot be used universally: The power adapter can damage your laptop due to incorrect voltage. The correct way is to look at the back of your battery to see how many volts and amperes it indicates; then you can purchase a charger or power adapter that matches those specifications. If it’s an ASUS laptop with a 14-inch or 15-inch screen purchased within the last 2 years, it generally uses 19V-3.42A power. You can purchase it at local computer stores; the cost is usually around 70 yuan. However, they generally won’t sell it to you at that price, so it’s better to budget around 100 yuan for it. This type is OEM, meaning it has a similar voltage level. Those produced by other manufacturers are considered counterfeit goods, but they still work fine for use. Those who want to purchase the original version can go to the local ASUS after-sales service center; the price is likely around 380 yuan, subject to the actual price in that area. 　　Strictly speaking, the power adapters for laptops from different brands are not interchangeable. Even if the voltage and current specified on the labels are the same, they should not be used together, as this can cause faults or damage to the power interface or the motherboard. Power adapters of different models from the same brand can be used temporarily, but they should not be used for too long. It is best not to purchase or use counterfeit power adapters, as they pose many risks, including spontaneous ignition and explosions; it is advisable to use original power adapters instead. 　　1. Different voltages The voltage of power adapters for laptops from different brands varies; for example, IBM typically uses 16V, Dell uses 20V, HP uses 18.5V, and Sony uses 19.5V, among others. It can be seen that even if the power adapter interface is the same, power adapters from different brands cannot be used to supply power to a laptop. 　　2. Different interfaces 　　The interfaces of power adapters for laptops vary among different brands, which means that power adapters from other brands cannot be plugged into your laptop to supply power. Different interfaces are relatively safe, because at least you won’t plug in a power adapter with incorrect current or voltage to power the laptop, thereby causing damage to its hardware. 　　3. Different current levels The current output of power adapters for laptops from different brands also varies; for example, IBM typically uses 4.5A, Dell uses 3.34A, HP uses 2.7A, and Sony uses 4.1A, among others. In fact, the voltage and current of laptop power adapters from the same brand can also vary. Therefore, even when using power adapters interchangeably among laptops of the same brand, it is necessary to check the voltage and current specifications. 　　The company’s main products include switching power supplies, power adapters, laptop power adapters, chargers, power boards, LED power supplies, and other electronic products. We sincerely hope to cooperate with friends from around the world to provide high-quality products, and are committed to becoming an excellent supplier of switching power supplies and electronic products.