so i maybe a complete ignorant moron, but im fairly sure this http://www.amazon.com/Acer-E5-573G-59C3-2-20GHz-GeForce-Bluetooth4-0/dp/B0105JD1HE laptop has a 2500mah battery, and the note 4 a 3220 mah battery. can someone please explain this to me?
Insanity of Broadwell, if you just let it sit on the iGPU, it sips power.
but the battery is so much smaller, why not make it like 20000mah so it lasts for days? i mean the battery of the note 4 is very small when compared to this battery.
because fuck logic...
Yep, my Galaxy S5 has a 2800mah battery
It's a way to drop price and size. I mean, the new Macbook's battery thing is not a very common technology, so Acer came up with their own way. You sacrifice something at that size and price.
The batteries provide different voltages. Amperage is only a measure of current, not energy.
Multiply the battery voltage with the ampere hours to get the amount of watt hours. That is a the true measure of stored energy in a battery.
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Short answer is it doesn't work that way. That phone battery is providing a lot less juice for that mAh rating.
mAh can not be used to compare batteries of different types. You need to look at the watt hour rating. Or how much energy than can provide for an hour. Plus, manufacturers report mAh differently.
The Note 4 has a 3220 mAh battery which puts out about 3.8V. That is 12.32 Wh.
Laptop has a 2500 mAh battery which puts out about 14.8V. that is 37 Wh.
The actual capacity of the laptop battery is much larger despite the lower mAh. If you could somehow get your laptop to run off that low voltage and used the Note 4 battery it would last much much less than if you used the 2500 mAh.
why make it so confusing for the consumer then? i mean i understand the importance of this in industry, but when were talking about specs on electronics id rather get the total amount of energy thats stored in the battery with the amount of energy it outputs.
mAh was never designed to compare battery life across devices and wasn't meant for the consumer. It is just a measure of that particular cell for whatever purpose.
WH would still be confusing. Plus there are so many variables that effect battery life. A lot more than the specs of the cell tell. That is why companies just say "It has about 5 hours of battery life"
Though... "5 hours of battery" is usually referring to idling or like... doing nearly nothing. It's usually just BS, at least in my experience.
Yeah but it gives you some idea.
Wh doesn't really. Two phones could have a Wh of 12. One is an iPhone the other a basic flip phone. Which will last longer?
Battery ratings are all estimates.
ok i think they should give the total stored electrical energy in a battery, and its output plus the devices maximum power drain on said battery.
laptop 2500mah @ 14.8 volts.
2500mah = 2.5 amp hours.
2.5ah*14.8volts=37 watt hours.
3220mah @ 3.7 volts.
3220mah = 3.22ah
3.22ah*3.7=12.32 watt hours.
Watt hours is the amount of energy in a battery.