**Equation**

(mAh)*(V)/1000 = (Wh). For instance,that you have a 400mAh battery appraised at 6V,

the power is 400mAh * 6V/1000 = 2.4Wh.

Also, We have a similar tool to a calculator to convert wh to mah

**mah**

The mAH detail of a battery represents milliampere-hour. Mah is a measure of milliamperes that a battery can give (to a circuit or gadget) for the measure of hours indicated in its detail. Accordingly, a battery if an mAH particular of 1800mAH can give 1800mA (milliamperes) for 2 hours of time. A battery with an mAH detail of 10,0000mA can give 100000mA to 2 hours of time. The batteries are wellsprings of intensity and give out current when associated with a shut circuit, all batteries, regardless of whether standard or battery-powered, give current. So they give current, they accompany the particular mAH to quantify to measure of current that they can inside an hour time. Again mAH, milliampere-hours, show what number of milliamperes of current the battery can supply every hour of utilization. Once more, for instance, a 1800mAH battery can supply 1800mA of current to a circuit for 65 minutes, and afterward, it will have utilized the entirety of its charge.

Generally, a circuit won’t request 1800 mAH of current at the same time for activity. A circuit may rather just need 370mA of current for activity. For this situation, the battery supplies 370mA for 6 hours, since 370*6=2220. Or on the other hand for different circuits, it can supply 190mA of current for 11 hours, since 180*10=1800.

The result of the current expended times the number of hours being used must be equivalent to the mAH detail.

In this manner, our equivalent model, of a 1800mAH battery can be utilized in the accompanying manners, as model

3600mA for 0.48hours

1800mA for 60 minutes

900mA for 1.8 hours

450mA for 3hours

120mA for 11 hours

20mA for 58 hours

The mAH detail shows to what point a battery will have the option to reattain in a circuit, given the circuit’s capacity provided, and how much current the circuit allowed.

The mAH is the battery life depends on the current limit, the more mah methods the more drawn out a battery can longer, or the more present it can supply in a circuit. So batteries with higher mah are progressively attractive, in light of the fact that they can keep going for a more drawn out various times but till they have a higher current limit.

While looking at AA into D cell batteries, AA batteries typically have a longer mAH life, while D cells have a lot more mAH. An AA battery may have an mAH of 3000, while a D cell may have 11,000mAH. so, D cells are physically greater and are more costly than C or AA batteries. D cells give current to a more drawn-out timeframe than all others. Along these lines, for instance, suppose there is a circuit that devours 250 mA every hour. With an AA battery evaluated at 2100mAH, it can control the circuit for 2100mAH/250mA= 8.4hours. Currently, a similar circuit controlled by a D cell battery evaluated at 11,000mAH can control the circuit for 11000mAH/210mA= 52 hours. Consequently, the D cell can control the circuit for fivefold the amount of time as the AA battery cell can. In this manner, you can calculate how higher mAH values are increasingly alluring in circuits since it prompts a longer timeframe of realistic usability for circuit gadget activities

**Watt-hour**

Induction: The watt is a unit (in fact one joule for every second) that was initially proposed in the year of 1882 with respect to James Watt, a British architect who concocted an improved steam motor and instituted the expression “drive.” When Americans measure how quickly and how far a vehicle is voyaging, we utilize a pace of miles for each hour and a number of miles. At the point when we measure water streaming, it’s in gallons every moment and gallons. At the point when we measure electrical vitality use, the rate is watts and the amount is watt-hours. On the off chance that you don’t have the foggiest idea about the distinction between a mile and a mile for every hour, you’ll never get separation and speed. Get the fundamental qualification among watts and watt-hours into your head and you’ll be en route to seeing how you utilize electrical vitality in your home—and how to lessen the waste. A run-of-the-mill wasteful American home uses what might be compared to somewhere in the range of 26,000 and 110,000 watthours (26–110 kilowatt-hours; KWH) of power every day, contingent upon its size, the number of tenants, area, heat source, and so on. Most examinations show that warming and cooling utilize 46 to 56 per cent of a home’s vitality. Water warming comes in second, utilizing 13.5 to 21.5 percent. Refrigeration may utilize 6 to 9 per cent, lighting 8 to 11 per cent, and different machines and hardware, 25 to 35 per cent. Be that as it may, what’s a higher priority than where the vitality goes in some invented “run of the mill” home is the place it goes in your home. What’s more, there’s nothing you can peruse here that will disclose to you that—you have to quantify it! To gauge the electrical vitality utilization of apparatuses in your home, you need a meter that estimates watts and watt-hours. A few makers make such meters, including prevalent brands, for example, the Kill A Watt meter from P5 International, the Watt’s Up meter from Electronic Educational Devices, and the Digital Power Meter from Brand Electronics. Get one of these meters today, and you can start to sleuth out where your power dollars are going—apparatus by machine. Fitting your meter into a divider attachment, and start checking apparatuses with it. Peruse the watts show, and you will see the pace of vitality used for the machine you’re trying. On the off chance that your TV is drawing 10 watts in any event, when its capacity switch is off, it’s utilizing 12 watt-hours of great importance or 240 watt-hours of the day. (For any electrical burden with a consistent vitality draw, you can quantify the wattage and afterward increase continuously of utilization. For example, if your preferred work area light draws 20 watts (you have just moved up to a proficient smaller bright light bulb) and you use it four hours every day, the vitality load is 80 watt-hours of the day.

Apparatuses that cycle on and off, for example, your cooler, washer, or espresso producer—adopt an alternate strategy. Fitting the apparatus into the meter and leaving it for a couple of days or seven days. At the point when your trial is done, partition the KWH devoured constantly the apparatus was connected to the meter, and increase by 24 to get KWH every day. At that point visit the American Council for an Energy-Efficient Economy and Energy Star Web locales for vitality effective machine electrical utilization, so you can choose whether it’s an ideal opportunity to update your apparatuses to progressively productive ones. On the off chance that you need to understand our home’s vitality utilization, understanding the contrast between a watt and a watt-hour is the initial step. At that point, you have to purchase a meter and get the chance to take a shot at discovering where your watt-hours are going. Decided mortgage holders can cut their vitality use by 33% or more by executing vitality proficiency and protection measures. Give yourself an objective to decrease your vitality use, and start distinguishing and wiping out those inefficient watt-hours today!

A watt (symbol W) is a unit of intensity. In the International System of Units (SI), it is characterized as a determined unit of 1 joule for every second and is utilized to measure the pace of vitality move. At the point when an article’s speed is held steady at one meter for every second against a consistent restricting power of one newton, the rate at which work is regarding electromagnetism, one watt is the rate at which electrical work is performed when a flow of one ampere (A) streams over an electrical potential contrast of one volt(V), which means the watt is comparable to the volt-ampere (the last unit, be that as it may, is utilized for an alternate amount from the genuine intensity of current, the energy in watt-hours is equal to the charge in milliamp-hours times the voltage, then divided by thousand.

**Examples**

1. How many mAh is 24.5 Wh calculated?

mAh to Wh Conversion Formula :

(mAh)*(V)/1000 = (Wh)

Thus, the energy in watt-hours is equal to the charge in milliamp-hours times the voltage, then divided by 1,000.

For example, to convert the charge used by the average C battery, which is 7,000 mAh at 1.8 V, to Wh.

Answer: 7000*1.8/1000=12.6Wh

2. How many mAh is 11.1 Wh calculated?

The battery said 11.1 Wh, and the output voltage was 12V DC. Converting to mAh was: (11.1 / 12) x 1000 = 925 mAh.

3. Is a 10000mAh battery pack allowable in an airplane?

Our power bank is 10000mAh which is the same as 150-Wh at 6 V. Usually you can bring two on board, so basically there is no problem to bring it on board, in the passenger bag.