Can I connect a LED directly to a battery?
Never connect an LED directly to a battery or power supply because the LED is likely to be destroyed by excessive current passing through it. resistor is suitable for most LEDs if your supply voltage is 12V or less.
How long do LED lights last with batteries?
A fresh set of 3 AA batteries or 2 round C-style batteries should last over 100 hours, while a standard set of 3 AA batteries should last about 18 hours.
How much current does a yellow LED need?
This is a very basic 5mm LED with a yellow lens. It has a typical forward voltage of 2.0V and a rated forward current of 20mA.
HOW LONG CAN LED strip lights stay on?
LEDs have an unbelievably long expected life-span, compared to both incandescent and fluorescent lights. With an average life-expectancy of some 50,000 hours, LED strip lights will still be burning bright in 17 years’ time, long after their traditional counterparts will have expired.