Skip to main content

Understanding mAh

In this episode -  Understanding Milliamp Hours (mAh) . . .



Adapted article from the How-To-Geek Newsletter by Kris Wouk.


When shopping for backup power (portable charger) for your phone, you're sure to encounter the term milliamp hours or the abbreviation mAh. Not sure what this means, let's examine it.


What Are Milliamp Hours?


Milliamp hours (mAh) is a unit that measures power over time.


A milliamp is a measure of electric current, precisely one-thousandth of an amp. Amps and milliamps measure the strength of the electric current. Add hours to this, and you get a measure of how long this current can flow at that strength.


Let's use a battery as an example. If your battery can maintain a current output of one milliamp for one hour, you would call it a one mAh battery.

You will see mAh used in many electronic devices with a battery, from phones, and watches, to Bluetooth devices. These devices range from hundreds of milliamp hours into the thousands in terms of capacity, but they're all measured the same way. One thing to note here is that milliamp-hours are only a measure of capacity. They don't dictate how fast your backup battery will charge a device.


Device Capacity -


The average smartphone has a battery capacity ranging from 2,000 to 4,000 mAh. But as phones have advanced, demand for batteries has increased, thus diminishing battery life overall. This means portable chargers are more popular than ever. To be of any practical use, you'll want a compact charger that has at least as much battery capacity as whatever you'd like to charge. After all, an older charger with a 2,000 mAh capacity doesn't do much for an iPhone 13 with a 3,227 mAh battery.


A charger with roughly the same capacity as your phone or tablet is better than nothing, but bigger is almost always better. Even if you don't use the maximum capacity of your charger, it's often better to have the extra power and not need it than find yourself without it.


For example, if you need to charge your smartphone while wilderness camping, you'll want a higher-capacity charger since you will have no opportunity to recharge. Look for a battery of about 20,000 mAh, especially if you're planning more extended trips.


Another option is to harness the power of the Sun - Solar power banks are starting to come down in size and price.


Here's a mountaineering tip: if you're like me, you use your smartphone as a camera, take videos, document ideas in Notes, listen to audiobooks, music, and so much more. Place your phone in airplane mode, especially when you know there is no cell signal. This will extend your battery.


More Power!


Charger capacity continues to increase as our devices' batteries get larger. That brings up the question, is it possible to have a charger with too much capacity for the devices you are charging?


While there are some downsides to larger capacity chargers, there aren't many, and none of them are dangerous. A charger with many more milliamp hours of capacity than you require won't damage your device.


The main downside of a charger with more capacity than you need is size. More capacity means larger batteries, which sometimes require more space for cooling. This can add additional bulk and steal valuable backpack space, but clever packing can solve this problem.


The other downside to a battery with a larger capacity is that it will take longer to recharge.


The bottom line is this; determine your phone's battery capacity and adjust accordingly. So, let's hit the trails this summer fully charged!


If you have a suggestion for a future podcast, email me at pball@sbcglobal.net or click the link  https://anchor.fm/patrick-ball/message and leave us a voice message.


I'm Patrick Ball; thanks for listening. See you in the next episode.

Labels:

Comments

Post a Comment

Most Popular of All Time

The Language of Home: Building a Sanctuary

This episode is  for anyone trying to find their footing in a new place—whether it’s a new city, a new job, or a new country. The light in Florence, Italy, has a way of making everything feel like a Renaissance painting—the golden hue on the stone, the steady rhythm of the Arno River, and the feeling that you are walking through a history much larger than yourself. I was there to give a presentation to a class of Gemology students. I was prepared to discuss color grading and refractive indices, but not to be outed as a language tutor . Feeling very much like a guest in a storied land, a hand shot up enthusiastically. "You’re the guy on the podcasts," the young woman said, her eyes bright with recognition. "You’re the one teaching us English." I laughed nervously. If you know my flat Midwestern accent, you know the irony here. I am hardly an Oxford professor. But later, as I wandered the cobblestone streets beneath the shadow of the Duomo, the humor faded into a powe...
Post a Comment
Read more

Practiced Hands: The 50-Year Warranty

What Doc Burch Taught Me About Staying Active. We talk a lot about "life hacks" these days, but most of them don’t have a very long shelf life. Usually, they’re forgotten by the next app update. But back in 1972, I received a piece of advice that came with a 50-year warranty. It’s the reason I’m still on my bike today, still chasing a golf ball around Carlsbad, and still—mostly—in one piece. The Kick That Changed Everything It started with a literal kick in the pants. A kid at school in Cuba, Illinois, was joking around and caught me just right. By the next morning, my lower back was screaming. My mom didn’t reach for the Tylenol; she reached for her car keys. "Let’s go see Doc Burch," she said. "He’ll fix you right up." Harry E. Burch, D.C., was a fixture in Lewistown. He’d graduated from Palmer College in ’59 and had been our family’s go-to for years. He was a man of practiced hands and steady eyes. After a quick exam and an X-ray, the mood in the room s...
Post a Comment
Read more

Chasing 70

In this episode,  Chasing 70: A Respectful Negotiation with Gravity They say golf is a game of misses. If that’s true, my first round of the year at Rancho Carlsbad was a masterclass in missing efficiently . After a four-month hiatus—during which my golf clubs quietly evolved into a self-sustaining garage ecosystem—Lori and I returned to our local par-three proving ground. Rancho Carlsbad is a par-54, just 1,983 yards long. That sounds forgiving until it exposes every weakness you’ve been politely ignoring during the off-season. I finished with a 78. In most contexts, 78 is respectable. On a par-54, it means I spent a fair amount of time “getting my steps in.” But here’s the real motivation: I turn 70 this August. As a core principle of my Great Un-Working Lifestyle, I’m putting it in writing: I want to shoot my age by my birthday. The Bald-Headed Man Course Around here, we have a nickname for Rancho Carlsbad. We call it the Bald-Headed Man Course. First, because there are no woods...
Post a Comment
Read more

The Miller Effect

In this episode - The Miller Effect . . . The sun hung high in the sky, casting shadows across the desolate landscape of Huron, California. Dr. Vo, a brilliant yet witty electrical engineer, stood before the main breaker box of a massive 1.4 MW-DC solar array that had confounded everyone who had dared to diagnose its persistent issue. It had been six long months of head-scratching and ten failed attempts by others before the desperate call came into Dr. Vo's office. As the sun's rays bathed the vast array in an orange glow, Dr. Vo stepped up to the Main breaker box, his sharp eyes shaded by his green Cenergy cap. He wore his North Face jacket that billowed in the light breeze, and his presence exuded an air of mystery and intrigue that was as pervasive as the problem at hand. The solar array was a colossal assemblage of panels, wires, and inverters, but the main breaker kept tripping, sending the entire operation into chaos. The workers at the site were on edge, muttering, “We’...
Post a Comment
Read more