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Osama Humeid
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Why the big battery of the iPhone is just 1420mAh?

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Apple engineers went all the trouble to make everything smaller inside the iphone 4 and made the battery larger. since the battery looks bigger than for example the battery of Google Nexus S or Galaxy S, why its only 1420mAh? did they go all that trouble to maximize the size of battery just to put a 1420Mah battery in it? Nexus S has a 1500mAh and both are 3.7V.. i really dont get it.. i wish i can get a very specific technical explanation.

Edited by: Osama Humeid ( )

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oldturkey03
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I can only speculate since I do not have access to an Apple engineer. I would think that this is a case where size does not matter in relation to the mAh. The size of the Li-Ion must also include special circuitry to protect the battery from damage due to overcharging or undercharging. •Lithium-ion batteries can handle hundreds of charge/discharge cycles. So it is not enough to say that 1500mAh is better than 1450mAh but one must consider those cycles and see how they compare with each battery. The other issues related to the output of a battery is the chipset of the equipment. If one has a efficient chipset, the amperage can belower and still be more efficient. Bottom line should be that with high speed data whether it be (3G, 4G, HSPA+) requires more transmission power because the CPU and radio or encoding/decoding BIGGER data packets compared to EDGE/2G. When CPU and Radio are both working at the same time with processing wireless data it takes more power because inner chip data transfer is taking place between RADIO <> CPU <> RAM. Thus reducing the battery. Therefore everyone's consumption is different based on WHEN and HOW they use their phone. Hope that helps to over come the 50mAh difference

Edited by: oldturkey03 ( )

thanks.. but still your answer doesn't explain for example the Samsung Galaxy S versus Iphone 4 case.. both devices have almost the same basic features and power requirement. they both use 3.7V batteries and both have Wireless, 3G and so on.. but clearly the volume of the iphone's battery is bigger! and despite that it has almost the same power capacity. it's just doesn't make any sense to me! maybe its quality and durability issue.. but still i feel something is missing here... :)

Osama Humeid,

This may be related to the difference of the chipset as well as the duty cycle of the battery. I believe that in order to compare those batteries is to really get more information than voltage and amperage. Also, what would be the difference when the charging circuit is removed.

oldturkey03,

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buzz jr Buzz
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A battery must provide enough m amps to power phone. the bigger battery does this. When you run down your phone you have to wait for the battery to charge up before it will turn on the CPU, this is because of amps not voltage or mah rating on the battery.

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rab777hp
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It depends on the quality and time spent on designing the battery, as well as the cost. For example, seidio makes great extended batteries that are the same size as OEM for the same size.

to clarify- not for iPhone i think, but for many android phones, I just preordered their new one for G2

rab777hp,

i know about Seidio and other alternative batteries.. i own a palm pre and i bought the 1400mah battery!! the original pre battery has a capacity of 1150.. which makes even wonder more! why the &%&% manufactures go for lower mah batteries of some unknown names like Mugen and Seidio can do better! look how huge the battery of iphone is.. i even calculated the volume of it.. which is clearly bigger than the one in pre, samsung and nexus.. but still just 1420mah!! if 1500 can fit in the one smasungs uses.. why apple cant go for 1700 for example!! i really need an answer for this and just speculation

Osama Humeid,

I know- I was thinking HTC should contract Seidio to manufacture their batteries

rab777hp,

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Frank Frankly
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dude, check the specs.

Nexus S and Galaxy S are using Li-Ion batteries, whereas the iphone 4 battery is a Li-Ion Polymer or Li-Po battery. It's a different technology and it does need more volume. If u need further explanation just check wikipedia on said battery technologies

dude, thanks for pointing this out. Of course you are absolutely right. The Li-Po batteries are same as Li-Ion, the only difference are electrodes used. Li-Ion cells use metal electrods while Li-Po cells use Polymer electrodes. Due to this they can be made flat, more light weight and gives very high discharge capacity compared to Li-Ion. The math is still the same, those numbers do not change.

oldturkey03,

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