You have a red LED that you want to connect to a 12V battery. The maximum current that it's safe to put through this LED is 10 mA. How much resistance does
![50pcs 12V 3mm red LED Built-in Resistor 9V Gauge Cluster Instrument Light Emitting diodes - - Amazon.com 50pcs 12V 3mm red LED Built-in Resistor 9V Gauge Cluster Instrument Light Emitting diodes - - Amazon.com](https://m.media-amazon.com/images/I/613BNNzw79L.jpg)
50pcs 12V 3mm red LED Built-in Resistor 9V Gauge Cluster Instrument Light Emitting diodes - - Amazon.com
![Amazon.com: EDGELEC 100pcs 5mm Red Lights LED Diodes (Red Lens) Diffused Round Lens 29mm Long Lead (DC 2V) +100pcs Resistors (for DC 6-12V) Included, Bulb Lamps Light Emitting Diode : Industrial & Scientific Amazon.com: EDGELEC 100pcs 5mm Red Lights LED Diodes (Red Lens) Diffused Round Lens 29mm Long Lead (DC 2V) +100pcs Resistors (for DC 6-12V) Included, Bulb Lamps Light Emitting Diode : Industrial & Scientific](https://m.media-amazon.com/images/I/61l60KLvvkL.jpg)
Amazon.com: EDGELEC 100pcs 5mm Red Lights LED Diodes (Red Lens) Diffused Round Lens 29mm Long Lead (DC 2V) +100pcs Resistors (for DC 6-12V) Included, Bulb Lamps Light Emitting Diode : Industrial & Scientific
![LED 5mm 12V with resistor and wire - bicolor red/green - common cathode - 5pcs. Botland - Robotic Shop LED 5mm 12V with resistor and wire - bicolor red/green - common cathode - 5pcs. Botland - Robotic Shop](https://botland.store/img/art/inne/20107_2.jpg)
LED 5mm 12V with resistor and wire - bicolor red/green - common cathode - 5pcs. Botland - Robotic Shop
![5mm 12V red LED with resistor [5mm_12V_PRE_RO_RD] - $0.20 : Welcome to LEDsales, LEDs and accessories for the electronic hobbyist 5mm 12V red LED with resistor [5mm_12V_PRE_RO_RD] - $0.20 : Welcome to LEDsales, LEDs and accessories for the electronic hobbyist](https://www.ledsales.com.au/images/5mm_pre_bare.png)
5mm 12V red LED with resistor [5mm_12V_PRE_RO_RD] - $0.20 : Welcome to LEDsales, LEDs and accessories for the electronic hobbyist
![10pcs 10mm Prewired Led Light Emitting Diode Dc 5v 6v 9v 12v Bright White Red Green Blue Yellow Pre Wired Resistor Lamp Bulb - Diodes - AliExpress 10pcs 10mm Prewired Led Light Emitting Diode Dc 5v 6v 9v 12v Bright White Red Green Blue Yellow Pre Wired Resistor Lamp Bulb - Diodes - AliExpress](https://ae01.alicdn.com/kf/S4bd70edce9c54a358988e400d1296cf9r/10pcs-10mm-Prewired-LED-Light-Emitting-Diode-DC-5V-6V-9V-12V-Bright-White-Red-Green.jpg)
10pcs 10mm Prewired Led Light Emitting Diode Dc 5v 6v 9v 12v Bright White Red Green Blue Yellow Pre Wired Resistor Lamp Bulb - Diodes - AliExpress
![Buy Wholesale China 5mm Red Diffused Led 12v 20ma Integrated Resistor & 5mm Led Red 12v at USD 0.5 | Global Sources Buy Wholesale China 5mm Red Diffused Led 12v 20ma Integrated Resistor & 5mm Led Red 12v at USD 0.5 | Global Sources](https://p.globalsources.com/IMAGES/PDT/B1194356271/5mm-LED-Red-12V.jpg)
Buy Wholesale China 5mm Red Diffused Led 12v 20ma Integrated Resistor & 5mm Led Red 12v at USD 0.5 | Global Sources
![10Set 5mm LED Diodes Kit, Red Light, Flat Top Clean Lens with Edge 28mm Pin, w Resistors (for DC 6-12V) - Walmart.com 10Set 5mm LED Diodes Kit, Red Light, Flat Top Clean Lens with Edge 28mm Pin, w Resistors (for DC 6-12V) - Walmart.com](https://i5.walmartimages.com/asr/b1d28c34-af6b-471f-ac85-6c3c8f1185fc.9174dc5c3d1b422528dd3a6d2ade0bdc.jpeg?odnHeight=612&odnWidth=612&odnBg=FFFFFF)
10Set 5mm LED Diodes Kit, Red Light, Flat Top Clean Lens with Edge 28mm Pin, w Resistors (for DC 6-12V) - Walmart.com
![How to select Resistor Value for LED with simple calculation|5v,12v,220v, Glow LED|Electronics pro| - YouTube How to select Resistor Value for LED with simple calculation|5v,12v,220v, Glow LED|Electronics pro| - YouTube](https://i.ytimg.com/vi/BP6mqF29pL4/sddefault.jpg)
How to select Resistor Value for LED with simple calculation|5v,12v,220v, Glow LED|Electronics pro| - YouTube
![50pcs 12V 3mm red LED Built-in Resistor 9V Gauge Cluster Instrument Light Emitting diodes - - Amazon.com 50pcs 12V 3mm red LED Built-in Resistor 9V Gauge Cluster Instrument Light Emitting diodes - - Amazon.com](https://m.media-amazon.com/images/I/612khjK5jnL.jpg)