How to Refill HP 44A/CF244A Laserjet Toner Cartridge easily without any Tool

Where can I buy toner powder from?

Thank you very much I have done just like you. But do you know why the lamp still lights up on my printer? and when I log in to the data and on the Hp app, there is still some toner left.

thanks

Please help which brand and model of the powder? Any recommendation ?

How much do you print a cartridge on a sheet of paper? And do you recommend hp m28a?

Please help what is the model of the powder
And the chip must be changed or not

Please help what is the model of the powder
And the chip must be changed or not

what about the chip? do you replace it?