Red rice k40 fast charging will not hurt the battery, the old five-watt charging head is only a little slower charging speed, but does not affect the battery life. The 33W fast charging head means that it can charge quickly with his support and the charging speed is relatively fast. Red rice K40 support 33W fast charge, full blood version fast charge, charging speed comparable to the traditional 55W, it is equipped with 4520mAh built-in lithium-ion polymer battery, the official introduction can be fully charged in 52 minutes, and red rice K40 charging speed is the reason for the use of dual cell scheme. The Redmi K40 is only 7.88mm thick, but it can fit into a 4520mAh large battery, while the Xiaomi 11 has almost the same capacity of battery, and the thickness of the phone has reached 8.06mm.
Fast charging will cause some damage to the battery, but this has been controlled to a certain extent.