# How many amps are in a 9 volt battery

Batteries are rated in amp/hours, a 9v has between 500 and 800 mAh (milliamphours). Have more questions? ChaCha is here 24/7! [ Source: http://www.chacha.com/question/how-many-amps-are-in-a-9-volt-battery ]

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**How many amps are in a 9 volt battery**“- How many amps in a 9 volt battery?
- http://wiki.answers.com/Q/How_many_amps_in_a_9_volt_battery&src=rss0
- The question should be how many amp-hours in a battery. In a small batt. like a 9V, this is measured in milli-amp hours (mAh), with 0.5 amp hours equaling 500 mAh. This means the battery could power a 0.5 amp load for 1 hour. Data I have se…

- What Is The Resistance In A Circuit In Which A 9-volt Battery Pro…?
- http://www.blurtit.com/q621613.html
- The formula for calculating resistance is , R = V / I Where R equals resistance V = Potential difference across the object measured in volts I = Current measured in ampere R = 9/3 = 3 Resistance is 3 Ohm.

- What is the amp output of a 9 volt battery?
- http://answers.yahoo.com/question/index?qid=20080423232950AA2QhiB
- What size battery? If it’s the small rectangular one, about 500mA-hours. that means half an amp for an hour. Battery manufacturers no longer specify capacity of batteries, so all you can do is guess at their capabilities.

## Related Questions Answered on Y!Answers

- How many amps and volts needed travel through 100ft of phone line?
- Q: I’m in the middle of a project, I need wire, and phone wire seems to be the cheapest by far… I need about 200ft of phone line, but only 100 will be used in one circuit. To simplify my question, can I power an LED through 100ft of phone line (26AWG) with a 9-volt battery? I only ask because I can imagine that the resistance might just kill the signal…If not, how many batteries can I tie together to do this?Also, is it necessary to use a resistor so that I don’t kill the LED?The LEDs say they are 5mm and 12V.There will actually be three LEDs on at a time. There will be three on/off circuits, green for ON and red for OFF.
- A: 200 feet of 26 AWG only is a couple of ohms, I bet. But if you want, short out the end where the LED is going to be, and measure the resistance at the other end. This is the additional resistance your LED circuit will experience from traveling down the wires. You are going to have to limit the current to the LED anyway using a series resistor with a nine volt battery. If it is an ordinary run-of-the-mill Green LED, the forward drop at 10 mA is going to be about 2.5 volts, and the battery is going to be supplying about 9.5 volts. So you are going to need a series resistance of (9.5-2.5)/.01 Ohms, or about 700 Ohms, so the wire resistance is negligible. If it is a different LED that requires more voltage or current, you need to modify the series resistance. Big LEDs may require more current than a standard 9 volt battery can supply. You can’t expect them to supply much more than 10 mA for very long. You will get more bang for your current by putting two or three LEDS in series and reducing the series resistance that is required, but then the brightness will become more sensitive to the drop in the battery’s voltage as it gets used up. Best bet is to make some reasonable estimates and calculate it out.

- How to figure out how many Watts My 12V battery Can Take?
- Q: hey guys i need to figure out what i need to power my sound system in my light weight truck i have a amp that draws 1500 watts RMSi am trying to figure out what specs i need to look for in a deep cycle battery i am looking at yellow cap OPTIMA Batteries hysical Characteristics:Plate Design: High purity lead-tin alloy. Wound cell configuration utilizing proprietary SPIRALCELL® technology.Electrolyte: Sulfuric acid, H2SO4Case: PolypropyleneColor: Case: Light GrayCover: “OPTIMA” YellowGroup Size: BCI: 51 Standard Metric Length: 9.313″ 236.5 mm Width: 5.063″ 128.6 mm Height: 8.938″ 227 mm (height at the top of the terminals) Weight: 26.0 lb. 11.8 kg Performance Data:Open Circuit Voltage (fully charged): 13.1 voltsInternal Resistance (fully charged): 0.0046 ohmsCapacity: 41 Ah (C/20)Reserve Capacity: BCI: 70 minutes (25 amp discharge, 80°F (26.7°C), to 10.5 volts cut-off)Nominal Voltage: 12 voltsPower:CCA (BCI 0°F): 500 ampsMCA (BCI 32°F): 625 ampsRecommended Charging:The following charging methods are recommended to ensure a long battery life: (Always use a voltage regulated charger with voltage limits set as described below.)Model: D51 and D51RThese batteries are designed for starting and deep cycling applications and for use in vehicles with large accessory loads.Recommended Charging Information:Alternator:13.65 to 15.0 voltsBattery Charger (Constant Voltage):13.8 to 15.0 volts; 10 amps maximum; 6-12 hours approximateFloat Charge:13.2 to 13.8 volts; 1 amp maximum (indefinite time at lower voltages)Rapid Recharge:(Constant voltage charger)Maximum voltage 15.6 volts. No current limit as long as battery temperature remains below 125°F (51.7°C). Charge until current drops below 1 amp.Cyclic or Series String Applications:14.7 volts. No current limit as long as battery temperature remains below 125°F (51.7°C). When current falls below 1 amp, finish with 2 amp constant current for 1 hour.All limits must be strictly adhered to.Recharge Time: (example assuming 100% discharge – 10.5 volts) Current Approx. time to 90% charge 100 amps 25 minutes 50 amps 65 minutes 25 amps 130 minutes Recharge time will vary according to temperature and charger characteristics.????how long will this battery run with out my engine running whole drawing 1500 watts from my 12V battery????
- A: With all this data you should be able to come up with something on your own. You could pay someone to do this too.

- anyoneee good at PHYSICAL SCIENCE?????
- Q: 1) what is the diff. between placing a 1.5 volt battery in a circuit and placing a 9 volt battery in a circuit?2) what could you do to a close circuit consisting of a bettery, a lightbulb, and a switch that would INCREASE the amount of current flow? explain..3) same as above but DECREASE4) describe one thing that you could do to a wire used in a circuit to decreaes the amount of resistance by the wire.5) state the relationship between resistance and current, as well as the relationship betweem voltage and current..MATH PROBLEMS?current = 4*1.5 volts/6 ohms=6 volts/6 ohms.current = 1 ampere1) how many amps of current flow thru a circuit that includes a 9 volt battery and a bulb with a resistance of 6 ohms?2) same as above but with 12 ohms.3) how much voltage would be necesssary to generate 10 amps of current in a circuit that has 5 ohms of resistance?4) how many ohms of resistance must be present in a circuit that has 120 volts and a current flow = to 10 amps?
- A: Voltage = current X resistance (V = IR)1. If you change batteries, you change voltage. The resistance in the circuit won’t be changed so that means the current will change.2. current, I = V/Rif you increase voltage then you will increase the current flow.If you decrease the resistance in the circuit then you will increase the current flow.3. decrease voltage to decrease currentincrease resistance to decrease current4. heating the wire decreases the resistance in the wire. shortening the wire will decrease the resistance of the wire.5. increasing the resistance decreases the current.increasing voltage increases current.Math1. I = V/R if R = 6 and V = 9, I = 9/6 = 1.5 amperes2. I = V/R if R = 12 and V = 9, I = 9/12 = 0.75 amperes3. V = IR if R = 5 and I = 10, V = 5*10 = 50 volts4. R = V/I if V = 120 and I = 10, R = 120/10 = 12 ohms