A very basic question- I know about current limit resistor when using leds but I'm unsure about a DC charger. A friend has a small rechargeable kitchen appliance but the charger has been misplaced. The appliance is marked as 3V 150mA but not battery type. I've looked for suitable mains adapters and found them with 3V 300mA, 500mA, 800mA etc. Can a higher rated charger just be used or should a current limiting resistor be used? How do I calculate it's value since both the supply and appliance voltage ratings are the same?
Thanks!
Thanks!