# Quick Answer: Can I Connect A LED Directly To A Battery?

## Can you run LED lights off a battery?

LED lights are long lasting and can help you save on electrical costs.

Many LEDs can even be run off a 12v battery..

## Will a 9v battery power a 12v LED?

you can use 9v battery for 12v Led . Just only the brightness is less than 12v battery . … if you need only Light purpose then you can use 9 volt instead of 12 volt supply.

## How long can a AAA battery power an LED?

3.6 hoursAn LED is fairly bright with a current of 20mA. Three 3V LEDs need a power of 3 x 3V x 20mA= 0.18W but the voltage boosting circuit needs about 0.1W so the total is 0.28W. An AAA alkaline cell will power them for 1W/0.28W= 3.6 hours.

## Do LEDs work on AC or DC?

In most applications LEDs are driven by a DC power supply. LEDs consume DC current to produce light; with AC current the LED will only be lit when current flow is in the proper direction. AC applied to an LED will cause it to blink on and off, and at high frequency the LED will appear to be lit continuously.

## What size solar panel do I need to charge a 12v battery?

For a 12V system, if you need to replace 100A/h of charge to your batteries each day, and you have 8 sunlight hours in each day you will need… 1200WH / 8H = 150W of solar panels. In reality it is recommended that you always overrate your requirements by at least 20%, therefore you would need 180W of solar panels.

## How long will a 60 watt bulb run on a 12 volt battery?

72 HoursA 60 Watt bulb (230 Volts rating) will only draw a current of 0.25 Amps approx. So if operated on 12 Volts battery it may run for longer time = 18 V/0.25 A = 72 Hours but its Wattage ( & light) will be only = 12 V x 0.25 A = 3 Watts Bulb.

## How long will a 12v battery run LED lights?

In respect to this, how long will a 12 volt battery run LED lights? 7 hours is 27% of 25.76 hours. You have 40 W total load; at 12 volts the current is 40/12 amps This is 3.33 amps; time to 100% discharge 85/3.33 = 25.5 hours approx. If you use 80% of the charge, that gives 0.8 x 25.5 hours which is 20.4 hours.

## What resistor do I need for 12v LED?

We’ll use the following formula to determine the resistor value: Resistor = (Battery Voltage – LED voltage) / desired LED current. For a typical white LED that requires 10mA, powered by 12V the values are: (12-3.4)/. 010=860 ohms. To use several LEDs in parallel, sum the current values.

## How do you connect LED lights to a 12 volt battery?

How to Wire LED Lights to 12-Volt Auto WiringOpen the hood of the car and disconnect the negative cable from the battery by loosening the lock nut on the terminal with a wrench and pulling the cable off.Decide where the lights will be placed in the vehicle. … Pass two wires through the hole where the LED will be mounted.More items…

## What happens when an LED is directly connected to a power supply?

When LED is connected to a power supply with a voltage higher than its forward voltage, a current limiting resistor is connected in series with the LED. The current limiting resistor limits the current for the LED and regulates the difference in voltage drops between the LED and the power supply.

## How many LEDs can a 12v battery power?

So, a 12V battery wired to four 3V LEDs in series would distribute 3V to each of the LEDs. But that same 12V battery wired to four 3V LEDs in parallel would deliver the full 12V to each LED – enough to burn out the LEDs for sure! Wiring LEDs in parallel allows many LEDs to share just one low voltage power supply.

## Can I use LED without resistor?

When hooking up an LED, you are always supposed to use a current-limiting resistor to protect the LED from the full voltage. If you hook the LED up directly to the 5 volts without a resistor, the LED will be over-driven, it will be very bright for a while, and then it will burn out.

## Do I need a resistor for a 12v LED?

1 Answer. AFAIK there is no, or at least no common, led diode that is typically 12V forward voltage by it self. 12V led are modules that consist of some combination of diodes and resistors to make them suitable for 12V power applications without needing extra current limiting.

## How do you connect LED lights to a battery?

Place 1 end of a copper electrical wire against the second terminal of the battery and tape it in place with electrical tape. Put the other end against the side of the bulb’s base to light up the LED light and tape it in place if you want to keep the bulb lit.

## What happens if you put too much voltage through an LED?

Unlike incandescent light bulbs, LEDs won’t burn instantaneously (unless you apply too much current) but will instead kind of melt or whatever damage heat causes to the device. Applying higher voltages could also affect the amount of current flowing through the LED because of Ohms Law.

## Can I connect 12v led to car battery?

Answering your question: you can’t use a 12v battery to power a 12v led strip directly. a fully charged lead acid will have 13.8v which will burn out your led strip if you are doing so. You don’t need a current limited device. … it will drop your 13.8v battery to 12.

## How long will battery operated LED lights last?

Depending on the LED, the bulb may last from 50,000 hours to 200,000 hours as compared to the 3,000 hours of an incandescent light. LEDs are also more durable and do not burn out, thus lasting longer than incadescents.