Recommended charger for Max 2 Pro

I wonder what kind of chargers are most suitable for my Max 2 Pro, and boox devices more generally. Boox official support informed me any charger with 5v 3a or lower is fine for Max 2 Pro. Some folks, However, Recommended me 5v 1a 9w, As less power is better for battery's health. My question: - Is there a first party charger for boox devices? I am willing to buy internationally from Hong Kong - What are the best 3rd-party chargers for Max 2 Pro. Please link chargers sold in online marketplaces like Amazon or AliExpress - Do you agree 5v 1a is better for battery's health? Thanks in advance