I am trying to charge an 850mah 3.7v battery using a TP4056 circuit that will recieve regulated 4.2v at a maximum of 500ma though the current can drop due to it being regulated solar power. What will occur if the regulated voltage is below what current I set the TP4056 to charge. I am using the TP4056 due to its trickle charge feature and its overcharge protection. Can I just set the current on the TP4056 to the max and let it charge at whatever current it has available?
Is there any chip that justs stop the flow of current once the battery has reached 4.2?