Hello - Bought a Lenovo Legion 7 for my son, which uses a 300W charger. The charger is ridiculously huge, which I am concerned will be an issue to carry for school. Is it possible to use a lower Watt charger? I bought a 170W, but does not seems to be charging, but seems is maintaining the % of the battery. Thanks
"Slim tip" plugs have 3 contacts: plus, minus, and a center pin. The center pin is connected to a resistor, the value of which depends on the power of the AC adapter. The computer senses the resistor, and often it will not allow an adapter to run the computer or charge the battery if the adapter is not powerful enough. I tried a 135 W charger instead of 230 W that came with the computer, and it didn't work.
Which computer do you have (something like 16ACH6 or 82K0005US)? Newer models are capable of USB-PD charging. I got a 65 W USB-PD charger, and it charges the battery and runs the computer, though at lower performance.
The wattage of the charger determines that maximum amperage that can be drawn to charge the battery, so while a charger that puts out fewer amps may be able to maintain the battery under light use, as you found out it cannot charge the battery while the laptop is in use.
If the laptop recognizes the 170W charger it will not hurt the laptop to use the lower amp charger, but your son will still need to use the 300w version to charge the battery. While gaming, the 300W will probably be needed to maintain the battery charge as well.
Cheers,
@RafyDad wrote:
... Is it possible to use a lower Watt charger? ...
- if you have a Lenovo Legion 7, a newer model, you can charge it via the rear USB-C port , but only to browse the sites, not to intensively use the laptop for games or applications with high demands
- you can try this charger model as an example :
USB-C charger Link https://www.amazon.com/Charger-Thinkpad-GX20M33579-4X20M26268-IdeaPad/dp/B07ZP3LWVF
@RafyDad wrote:
So is the new Legion 7 16 inches. ...
- if you want it to be from Lenovo and with fast charging, then you should use this charger from link below :
[ the charger mentioned above in my post was only given as an example, it would be best to buy from well-known manufacturers
