Lenovo legion y520-15ikbn is charging slowly or discharging while it’s plugged in?

When your PC is plugged in, you might see a status message that says your PC is charging slowly or discharging when you hover over or select the Battery  icon on the taskbar. This might happen if you're using a charger that didn’t come with your device. To speed up charging, use the charger and cable that came with your device.

Possible causes
The charger isn't compatible with your PC.
The charger isn't powerful enough to charge your PC.
The charger isn't connected to the charging port on your PC.
The charging cable doesn’t meet the power requirements for the charger or PC.

Solutions to try
Use the charger and cable that came with your PC.
Make sure you're connecting your charger to the charging port on your PC.
To speed up charging, charge your PC while it’s asleep or turned off.

Source from https://support.microsoft.com/en-us/help/4040260/windows-10-pc-charging-slowly

If you ever considering replacing this battery, you may order is at the link below, that is a original battery pack and price is 92 NZD. Just remember this battery need to replace with part number 5B10M41934, 5B10M41935, L16S3P24, 3INP6/54/91, L16M3P24.

Product link: https://www.storebattery.co.nz/lenovo-legion-y520-15ikbn-10.95v-4110mah-laptop-battery-store-for-new-zealand-p-366092.html