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Next-gen Realme flagship smartphone tipped to launch with up to 8,000mAh battery
(www.notebookcheck.net)
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this post was submitted on 01 Dec 2024
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Android
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When will phone manufacturers stop using mAh as a metric for the battery size? It doesn't mean anything without the voltage that the battery runs at. Just give me the watt-hour number
Are phone manufacturers running different voltage batteries?
The metric that'd be the most useful for the average lay-idiot like me would time estimates for multiple usage cases. Like, "this phone has a 50-30-4 battery, meaning:
If you don't have a bunch of shit running in the background or things like Bluetooth turned on, you just take it out of your pocket occasionally, send a text, then turn the screen off before repeating in a few hours: 50 hours,
If you have a "normal" amount of activity for screen time and other battery-consuming activities: 30 hours,
If we turn on EVERYTHING - screen at max brightness, Bluetooth, Wi-Fi, location, flashlight, and play the speakers at max volume while recording a video, it'll go from 100% to dead in 4 hours.
That would be so much better. Even phones with similar battery capacity exhibit so much difference in stand by times. I have a Realme phone right now but it's 5000 mAh battery seems very weak for me. Granted I am coming from a 7000mAh Techno phone, but this one feels almost half as efficient only. I guess stuff like higher refresh rates and OS optimizations do play hidden roles.
Ah is a measure of Coulombs or charge (A × h = C/s × hr × 3600s/hr = C). Wh is a measure of Joules or energy (W × h = J/s × hr × 3600s/hr = J).
As an electrical engineer, personally Joules would make sense in an idealistic way to describe how much energy batteries store because that's what they do, but the whole Ah/Wh framework simplifies calculations and makes it so you only really need to multiply, never divide.
I never really understood the focus on Amps as your primary unit to describe load on a system. It seems like NASA used to describe things this way when designing rockets/spaceships/landers for outer space/Moon missions. I remember listening to a podcast where NASA would budget their systems in terms of Amps, where you only had so much overhead in Amps.
Growing up as an EE in school and industry, Watts (and Volt-Amperes) is obviously the primary choice of metric, whether working in DC or AC.
So yeah I agree with you lol