Advice / search: combo charger for Lenovo laptop and smartphone?
Hey guys I need some help, I recently bought this convertible here from Lenovo Ideapad Flex 5 14 inch:
https://www.alternate.de/html/product/1704639?partner=goadwoPLA&campaignCode=STREICHP_OFFPAGE
The original power supply has 65 watts on it.
I'm looking for a small, compact charger like you know from a smartphone, so that I don't have to lug around the huge part from Lenovo with cold device plugs, etc. Every time. At best, I would like to be able to charge my smartphone with it at the same time (Huawei P20 / P30 with Quick / Supercharge). I saw that many chargers have multiple USB ports.
Laptop would be charged accordingly via USB C, smartphone too. Whether USB-A to USB-C or C to C does not matter in principle.
I would just like something where I don't have to worry that either too little power arrives or, for example, too many watts arrive at the laptop or smartphone and could lead to damage. And can charge both end devices at the same time without any loss of performance.
Thanks in advance! P / L would of course be great, it doesn't have to be the most expensive of the bunch:-)
Somehow you are pretty ignorant with electricity. First of all, it is important with which voltage a device must be operated or charged. For a notebook, that's around 18-22 volts. Your smartphone can only handle 5 volts.
Of course, the different devices also require different amounts of electricity. If you now take the voltage (volts) with the current (amperes), you get the power (watts). By changing the formula, you can of course calculate this or that. At 65 watts and approx. 20 volts, that's a good 3 A. For a smartphone with a charging current of presumably 500 mA (0.5 A) and a voltage of 5 V, that's around 2.5 W.
Let's be honest, the comparison of the power (watts) doesn't bring you anything. This is important for the wallet, because devices with a higher power consumption are expensive to use.
Your wish is a little different. You want to charge two different batteries with one and the same charger. Now it is the case that a 5 volt device dies when it gets 18 volts (bang, lightning, … - defective, broken). And if a device that needs 18 volts only gets 5 volts, it won't even start. So nothing happens there.
What does that mean for you now? You can charge your computer with the charger for Lenovo and your smartphone with your computer's USB port. Not exactly energy-friendly and therefore not good for our environment, but it works. Of course, it is better to buy a charger with very low conversion losses for each device and use it accordingly. That should be the best solution for our environment and for your wallet. Unfortunately, you then have to carry around 2 devices with you again. Maybe now you understand why other people do the same.
Well, not that ignorant either, I'm talking about such a combination power supply, which probably automatically recognizes how much power the device should be charged with. Otherwise the manufacturers wouldn't advertise that they can charge laptop and smartphone at the same time?! Only in view of the variety of products would like to find the most suitable for my area of application.
Had to open a new main answer again to be able to post a photo:
Source: wikipedia.de
USB Type C only has 5V and a maximum of 15 watts. According to your statement, notebook and 65Watt meet. USB Type C is not sufficient for this.
So you need a USB-PD charger. This can also provide the higher voltage that is usually required for notebooks.
I just skimmed the Wikipedia text and found no indication of a pin assignment or even a connector for PD. But you can assume that if you have a PD type, the connected devices will first negotiate below 5V with which voltage will be used afterwards. I can't say whether the 12V will then be sent over the 5V line or a separate line will be used for it.
It is crucial that all devices used must have USB-PD connections. Because that is the only way it works.
With the USB Type C power supply (link from your answer) devices can draw 5V and up to 15 watts, i.e. Up to 3 A. Here, too, the consumer must request the greater current from the mains / charger. It happens all by itself and you don't even notice it. Here, too, it is crucial that all devices use the type C connector.
