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The shunt resistor can be of lower resistance 0.3 or 0.5 Ohm. to increase the load current. I use this circuit for lithium iron phosphate battery chargers, it can also be used for any batteries where current limitation is required. It is also possible to calculate the approximate battery charge level by changing the voltage and make an indication with LEDs, or display it on the dial. #radio amateur #chinesemodule #LM2596