Understanding mAh for Batteries

Views: 231     Author: Ubest     Publish Time: 2023-09-27      Origin: Site


Understanding mAh for Batteries

Portable electronic devices such as smartphones, tablets, and laptops are essential in today's fast-paced environment for staying connected, informed, and entertained. However, keeping them charged throughout the day and night is difficult. You've probably seen the abbreviations mAh and Ah if you've been comparing devices to find the one with the best battery life. Understanding these battery ratings can assist you in selecting a device with an appropriate battery life for your needs.

If you buy a smartphone with a high enough mAh capacity, you'll never have to worry about running out of juice when you need it. Continue reading to learn about mAh, how to calculate a battery's storage capacity, and what it all means to stay charged in real life. Related product: LiFePO4 Battery.

What Is mAH?

The unit of measurement for the amount of electricity stored inside a battery is milliampere-hour (mAh). It specifically measures the amount of charge a battery can deliver in an hour. The longer the runtime between charges, the more milliampere-hours comparable devices have. While many people look at the specs for estimated battery life hours when shopping for a device, mAh is a more precise measurement of how long a device will last on a single charge.

It's one of the most important considerations when purchasing any electronic device because it's directly related to its run time. Before you buy, look at the milliampere-hour spec to see how long the device will last between charges and how much power it can store.

mAh is also a common measurement unit for portable power stations and solar generators. It, like any other device, measures the energy storage capacity of the battery. For example, if you want to use a solar generator to power larger appliances such as a washing machine, you'll need one with a higher mAh that can power high-wattage appliances for hours.

If you plan to use your solar generator or battery backup system during a power outage or for extended periods off-grid, mAh is an important metric to consider. The lower the mAh, the less time you will be able to use essential devices without recharging with AC power or solar power.

What Is the Distinction Between Mah and Ah?

mAh and Ah are measurements that describe the energy storage capacity of a battery. The distinction is that Ah is a larger unit of measurement than mAh. 1000 mAh is equivalent to 1 Ah. Smaller batteries typically use the mAh rating, whereas larger batteries display Ah ratings. A 12V car battery with 50 Ah and an hourly consumption of 5 amps will last about 10 hours. A smartphone with a 3000mAh battery and a 500mA per hour consumption would last 6 hours between charges.

How Is mAh Determined?

To measure storage capacity, battery specifications frequently use watt-hours (Wh) or kilowatt hours (kWh) and volts rather than milli-ampere hours. To determine how long the battery can sustain that output level before recharging, multiply the watt-hours by 1000 and divide the result by the voltage.

(watt-hours (Wh) multiplied by 1000) / voltage (V) = mAh

For example, if a battery can deliver a current of 1.5 watt-hours at 5V, it would have a 300mAh rating: (1.5Wh x 1000) / 5V = 300mAh

Is a higher Mah value associated with a longer battery life?

While many people believe that a higher mAh automatically means a longer battery life, this is not always the case. The device, battery type, and how it is used all influence how long a battery will last between charges. Battery life is also affected by how well you maintain it, battery chemistry, and manufacturing quality. Assume two portable power stations (PPS) have the same milliampere-hour rating. One battery powers large appliances like refrigerators, while the other powers low-power electronics like lights and smartphones.

Because it delivers more electricity at a faster rate, the PPS used for appliances will have a shorter runtime. Understanding mAh is only one piece of the puzzle when it comes to selecting the best battery for your electricity consumption needs. Furthermore, lithium-ion batteries for solar generators, particularly LiFePO4 batteries, typically have a longer runtime than other battery types. Lead-acid batteries have a lower self-discharge rate and a higher energy density than lithium-ion batteries.

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What Effect Does mAh Have on Battery Life?

The battery's storage capacity is determined by the mAh rating. A battery with a capacity of 2000 mAh provides a current of 2000 mA per hour. Higher mAh ratings generally imply longer runtimes; however, other factors also play a role. For example, when purchasing a solar generator or portable power station for backup power, homeowners should consider the mAh rating. A large PPS, such as the DELTA Pro, can charge your devices and run large appliances for several hours before needing to be recharged. With a 1600W solar charge capacity, you can charge the DELTA Pro off-grid using up to four 400W rigid or portable solar panels.

The DELTA Pro has a storage capacity of 3600Wh and a voltage of 48V. Using the formula above, it has a capacity of 75,000mAh or 75Ah (3600Wh*1000 / 48V = 75,000mAh). It also has a 6,500-cycle lifespan, which means the DELTA Pro can be charged and discharged 6,500 times before losing 50% efficiency. More life cycles mean the battery can be used for longer before losing efficiency or needing to be replaced. Lead acid batteries, on the other hand, typically last only a few hundred cycles — 10% or less of the lifespan of a LiFePO4 battery.

The Connection Between mAh and Battery Charging Time

Aside from battery life, the mAh rating influences charging time. A larger-capacity battery will typically take longer to charge. High mAh batteries typically take longer to charge than lower mAh batteries. The chemistry of the battery also has an impact on recharge times. The RIVER 2 series of portable power stations, for example, can be recharged in 60 minutes or less using household electricity and in 2-6 hours using solar panels.


A battery's mAh rating indicates how long it can go between charges and how much electricity it can hold. When all else is equal, higher mAh battery ratings imply larger storage capacities and longer run times. However, before making a purchase decision, you should consider other factors such as the device's power consumption and battery chemistry.

You can confidently select devices with the appropriate run time between charges for your needs now that you understand what milliampere hours mean. Sufficient electricity storage capacity can mean the difference between running out of power at critical times or weathering extended power outages for home backup and whole-home generator solutions.

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