# Question: How Many LEDs Can I Power With A 9v Battery?

## What is the maximum voltage a LED can withstand?

about 3.0 voltsThe maximum voltage applied it a single white LED is about 3.0 volts.

Several LEDs in series can match a higher voltage supply, or a resistor (or other current limiting circuit) can be used to limit the current..

## How long will a 9v battery power an LED?

one 9V battery will give you somewhere between 120 and 200 hours of illumination with the simplest circuit, a series resistor. With a good switching voltage converter circuit you should be able to get more than 600 hours.

## Can you run LED lights off a 9v battery?

you can use 9v battery for 12v Led . Just only the brightness is less than 12v battery .

## How many LED lights can you run off a car battery?

Hundreds of LED lights (consuming low power) can be lit with a single battery, for example you can light 100 lights having 5 watts each easily with the said battery.

## Can I connect a LED directly to a battery?

LEDs emit light when an electric current passes through them. The electrical behaviour of an LED is quite different from a lamp and it must be protected from passing excessive current, usually this is achieved by connecting a resistor in series with the LED. Never connect an LED directly to a battery or power supply.

## 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.

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

50 hoursMany of these cheap LED flashlights pull perhaps 20mA through the LED. A AAA battery typically can provide 1000 mAh which at 20mA is (more or less) 1000/20 or 50 hours.

## How long can a battery power LED?

Button cells come in capacities from about 45 to 100 mAh. So an LED drawing 1mA would last from 45 to 100 hours. Many LEDs are very dim at 1 mA. According to Duracell, the standard CopperTop AA cell has a capacity of between 2000 and 3000 mAH depending on how it is used and how end of life is determined.

## Can 240 volts kill you?

An electric shock from a 240 volt power point can kill you, but on a dry day your car door can zap you with 10,000 volts and just make you swear.

## Is it bad to put a 9v battery on your tongue?

No, it’s not “dangerous” to put a 9 volt battery on your tongue. It’s a bit hard to balance the thing on your tongue, but otherwise you shouldn’t get into any trouble. And do be careful to be standing and so prevent the battery from being swallowed.

## Do 12v LEDs need resistors?

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.

## Can a 9v power a 12v?

In most cases, you cannot use a 12V adapter to power a 9V guitar pedal. Using a 12V adapter on a pedal designed to only handle 9V can completely destroy it. There are some guitar pedals built to handle voltages higher than 9V.

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

The answer should be the source voltage divided by the voltage drop of 1 LED. So if your source is 12v, and your LEDs have a voltage drop of 3.5, 12/3.5v, gives you 3 LEDs. If the the forward voltage drop of the LEDs was exactly 3 volts, you’d be able to drive 4 of them, and would not need a current limiting resistor.

## Can a 9v battery kill you?

No. 9v cannot create enough current to kill you. Same with a 12v car battery, it can supply hundreds of amps through a wire but, there is not enough potential to pull lethal amounts of current through your body.

## Is licking a 9 volt battery dangerous?

You can lick a big honking D battery until your tongue is dry. Not much will happen. But if you lick a rectangular 9-volt battery, touching both the positive and negative terminals, you will receive a small electric shock. Truth be told, it’s not really bad for you, just mildly alarming and unpleasant.

## 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. That’s what they say.

## Is 9v too much for an LED?

A 9V battery can’t supply very much current, but without series resistor the current may still be too much for the LEDs. … In theory you could do without resistor, but the LEDs are never exactly 4.5V and your battery is never exactly 9V.

## Will a 120v LED work on 12v?

An important consideration when converting from 120v AC fixtures to 12v DC fixtures is that it is not always possible to simply re-route and and re-use the old wiring attached to a new 12v power source. … Too much voltage drop in the wiring will cause the light to operate incorrectly.