Question: What is the best current for Li-ion / Li-poly charging?

[LuizPauloDamaceno]

Hi everyone. Today I was reading about battery charging because I play with kernel modifications (faster battery charging), for example, i have a Lenovo A6020, wich have an SM5414 charger (can be powered with 5V up to 2,5A), but my battery is 2750mA/h. So... This device support high current battery charging (i think is compatible with quick charge 2.0 technollogy) . But, the point is: Is good for battery (can be risk?) with high current? What is a acceptable current for charging these batteries? And for example, in HVDCP (QC 3.0), With 5 / 9 and 12V, this current incrases a lot? All these circuits have buck converters to supply a stable voltage (4.4V) and a variable (High current, 1,5A~4A in some models). In my kernel mods i also used arround 2,5A at buck output (charging current) and measured with ammeter in USB cable 2,05A (programmed at kernel drivers). Mi xiaomi redmi 4x has a SM1351 charger and support HVDCP with 5, 9 and 12V all with 2A maximum.