A unit of battery capacity configured for easy calculation. The SI corresponding unit is Coloumb ( unit of "C") which is a measurement of charge. A=C/s (A=Amps) so A*hour are dimensionally similar with a scale factor of 60*60=3600. This roughly tells you how much current a battery will supply for how long. Note that this is an estimate of the total power delivered, the voltage of the battery will vary with current level as well as charge level.
Questions tagged [ampere-hour]
53 questions
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Batteries in series with different amp-hour ratings.
I have a 1.5 amp-hour, 12 V battery and I have a 10 amp-hour 12 V battery. I know the voltage will increase to 24 V when they are put in series, but I don't know what goes on amp-hour wise.
Does the new amp-hour rating take the amp hour of the low…
skyler
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Why is electricity consumption billed in watts and not amperes?
Basically the subject. Why would companies bill for wattage instead of amperes?
A. Munir
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10
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Watts - I think I'm getting free energy from a circuit?
Imagine I have a 10V battery with a capacity of 1Ahrs connected to a 100 Ohm resistor.
I'll get 0.1A (V/R) at a power of 1W (current x voltage) for a total of 10hrs. As a watt is defined as J/s my battery produces 3,600J (1x60x60) in total.
Now,…
user122374
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Battery Ampere-hour rating vs Battery Amps (not an experienced user)
I have almost no experience whatsoever with the technicals of electronics so this is probably a very easy question for someone who does.
Do you know if a battery with a 200Ah rating can put out 200A for one hour or are there limitations? According…
user3334776
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Do buck converters increase the ampere hours of a battery?
I've read that they are 90% efficient compared to linear regulators so given the relationship between volts and amperes and that I want to power the project off of a 12V battery that has 18Ah and is charged using a small solar cell. The project…
slartibartfast
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What is the 'continuous standard load' of a battery?
I'm currently integrating a coin cell power design into an electronics project. I am trying to verify my understanding of the 'continuous standard load' rating given for a battery (datasheet)
When looking through coin cell data sheets, I am…
Izzo
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Wiring different amp hour batteries in parallel
Can I wire 2 lithium batteries of the same make but different amp hours in parallel? I need 300 Ah in my battery bank. Can I wire a 12 V 200 Ah lithium battery and a 12 V 100 Ah lithium battery in parallel?
Tess Gallagher
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Calculating amperage from capacitor
I am calculating the output of a capacitor bank in A/s using Q = C·V, but I need to get the raw amperage. Can I do I = Q/t (in seconds)?
Teslingy
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How to calculate battery ratings for your solar panel?
If I want to choose a battery for my solar panel which is required to run a load of 5 kWh/day. Then I will be needing a battery with a rating of above 23 ampere hours since 5 kWh/220 V (since 220 V we get from grid in Pakistan) is equal to 23 ampere…
Muhammad Naufil
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Watt to amp-hours of AC device
Please help me understand the calculation in this table. The writer has a 12V batery connected to a 12V/110V inverter connected to standard house-hold AC appliances.
The calculation for the 1000W induction stovetop is:
1000W/12/0.85=98.…
grunt
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Understanding UPS runtime without Ah rating
Situation: I want to use a cell phone booster only, whose little power supply says 5 V 1 A and use a UPS just for that only in case of power outage.
With the ~$100 cell booster I will be using, whose power supply is only 5 watts, and figure 10 watts…
ron
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Measure mWh - mAh of an MCU-centered circuit
I build battery-powered circuits with MCUs that consume a few uA in sleep "stage." For total power consumption measurement (and therefore battery-lifetime), I used to use this but recently they changed its capacity range from 0.001Ah to 0.01Ah. I…
p_a321
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Way to calculate the draw limit on a battery
Is there a way to calculate the draw limit on a battery, using any of the Ah, C-Rating, etc. values to solve for the unknown? If so, how do you do it?
user256116
1
vote
1 answer
Calculating Battery Life with different working voltages
I have device that draws 30 uA in current continuously, and it is powered by a Panasonic CR2032 device (240 mAh - continuous standard load current: 0.2 mA ).
There are two components on this device, once is a sensor module and the other is a…
cben90
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Confused about battery rating specifications
I'm confused about how to understand battery capacity by its ratings. I though I understood Amp-Hours, as a nominal rating where they usually specified a period of time where that rating was approximately valid. So below is the rating a particular…
Frank
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