# Frequent question: How long will a 9v battery power an LED strip?

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This means a battery will last 550 hours if the load is 1 miliamp. It will last 275 hours at 2 miliamp load. You simply divide the mAh by the load. So for a load of 20 mA, you take the mAh rating of 550 and divide that by 20.

## Can a 9 volt battery power an LED strip?

The leds alone have a forward voltage of 3.6V at their typical nominal forward current, so you add in the voltage drop across the resistor, and 9V won’t cut it.

## How many LED lights can a 9 volt battery power?

9v can power 2 white/blue LEDs in series, or 3 red / (most) green / yellow. Each chain would need an appropriate resistor in series.

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

Battery Life

From a full charge, the battery pack is able to provide about a full hour of continuous illumination of an entire reel. The official battery capacity specification provided by RAVPower indicates 85Wh. This translates to approximately 1 hour based on the FilmGrade LED strip power spec of 90W per reel.

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

6. Can I Power a 12V Strip With a 9V Battery? The answer is “Yes”. A 12V strip can run on a power supply a little lower than its required electrical voltage, like a 9V alkaline battery.

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## Do LED strips need a resistor?

In addition to the LEDs, one or more current limiting resistors is also necessary to ensure that the LED strip does not go into overcurrent mode. The resistor is also placed in series with the LEDs, and its resistance value is calculated such that it will draw approximately 3 volts as well.

## How many watts does a 9V battery produce?

The voltage on the industry standard 9-volt battery is, obviously, 9 volts. Energizer’s 9-volt battery’s milliamp hours equal 610, or 5.49 watt-hours.

## 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 many LEDs can a AA battery power?

What is more important, brightness or operating time? If you operate at low enough current, you might be able to have 8 strings of 2 LEDs with 8 current limiting resistors. If you use a switching regulator, you can boost the 6V from 4 AA batteries high enough to operate two strings of 8 LEDs.

## How long does a 9 Ah battery last?

12V*9ah = 108 watt hours, so 108/20w = 5.4 hours.

## How long does 2100 mAh battery last?

The 2100mAh should last for 2100÷200 = 10.5 hours. The unit of 2100 mah shows nothing but the combination of mA and Hour. That means your bettery can give you certain mA of current for certain hours, and both are variable depending on total mah value. E.g. 2100 mah battery can give you 2100 mA of current for one hour.

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## How many 9V batteries does it take to make a 12V?

How to get 12V from 2 9V batteries – Quora. That will give you 18V. Will give you a reliable 12V output but cheaper voltage regulators from eBay, Amazon etc will be fine. You need to bear in mind your power requirements, this one is 60W which is a decent level.

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