4G Phones Are Really Fast — At Draining Batteries

Hugh Pickens writes "With Verizon's 4G network covering a good chunk of the country and AT&T gaining ground, more smartphone users have access to the fastest wireless service available. But because 4G coverage isn't truly continuous in many locations, users' batteries are taking a big hit with 4G, as phones spend an lot of battery power trying to hunt down a signal. 'You've got a situation where the phones are sending out their signals searching and searching for a 4G tower, and that eats up your battery,' says Carl Howe, a vice president for research firm Yankee Group. The spottiness of 4G stems at least in part from the measured approach carriers have taken to it, rolling out the service city by city. There are a few tricks 4G users can try to extend battery life such as turning off your 4G connection when you don't need the fastest speeds — when using email, for instance — or using a program such as JuiceDefender to search for apps you may have downloaded that you don't need to run all the time, and erase them."

Comments

truly breaking reporting

[Trepidity]

Newest Generation of Consumer Electronics Item Uses More Energy Than Previous Generation Did

Re:truly breaking reporting

[snowgirl]

The hard core android fan brags about having four cores in their phone, even if everything they're doing could easily be handled by a single core, gets its battery drained four times faster, and doesn't have a noticable performance improvement over the competition.

You mean, "even though their phone just turns off the three other cores 95% of the time anyways". And in fact, some even turn off all four cores, and switch over to a super power-saving core that has especially low performance, but is well enough to play music and HW-decoded video.

Re:truly breaking reporting

[larry bagina]

Umm, the standard fapple rebuttal to "my android phone has 4G!" is that 4G is a battery hog and Apple is more concerned with battery life.

Re:truly breaking reporting

[demonlapin]

The iPhone - and it really was the first in this category - got people to charge their phone every single night. Since then people have understood that part of the price you pay for having a smartphone instead of a RAZR (or one of the beasts that had a really long battery life - I had a dumpy looking Moto phone that could easily get ten days of standby if I didn't use it much) is that you have to charge it every night. As long as it gives a full 9-10 hours, most people don't care. If I can get 16 hours without a charge under heavy call/text use, I'm fine.

Re:truly breaking reporting

[anubi]

Consider the marketing angle... that's where the money is.

The people who are opening their wallet to buy are after the snazziest technology they can get. Bragging rights. By golly, they want to have something that everybody else doesn't have.

Lamborghini did not make their profits from their mileage numbers. Anyone who can afford their cars would probably reconsider their purchase if the car failed to pass everything they meet on the freeway.

So the phone won't run an hour between charges... who cares? The guy has already bought spare battery packs and charging apparatus. The phone has already served its purpose if it impressed the hell out of his co-workers during the call in the conference room.

These phones are not designed for the same market that goes to Wal-Mart for jeans.

Re:truly breaking reporting

[snowgirl]

Oh definitely, but for example the Tegra3 despite having four cores shuts them all down most of the time, and runs a 5th power-saving core. All of this is done silently behind the scenes, and so they never know that they're usually only running on a low-power efficiency core, rather than the roaring engine in the back.

It's like having a two-cylinder engine that is used during stop-and-go traffic (you know, the majority of what you do during your commute) that allows you to drive your Ferrari down to the store without having to fill up on gas on the way back home. But any time you have to impress someone, and pull out the e-peen, then you can just "drop the hammer" and the engine switches over to the high-performance v12, and you go "ZOOOOOOOOOOOOOOOM!"

It's definitely all about marketing. This is the best way that they could come up with to let you have your cake and eat it, too... "it has 4 cores, _AND_ it has excellent battery life! *mumbling under breath* because it is almost always running on an economy core unless you're showing off..."

Re:truly breaking reporting

[ozmanjusri]

Sounds like a brilliant design.

In many ways, it's simply a logical next step - see Nvidia's white paper for architectural details. http://www.nvidia.com/object/IO_90715.html

Thing is, we're so used to minimal innovation in the stagnant Wintel-controlled X86 world, the rapid pace of change in ARM systems is exciting. Imagine a beowulf cluster of them, for example...
http://arstechnica.com/business/news/2011/11/the-opposite-of-virtualization-calexdas-new-quad-core-arm-part-for-cloud-servers.ars

Re:truly breaking reporting

[Jeff DeMaagd]

My parents had to charge their Nextel phones every day or risk a dead phone on the second day.

I do charge my iPhone every day out of habit because I tend to forget once in a while, and if I forget two days in a row, I might be in trouble.

You might think iPhone started it, but people got in the habit of charging smart phones, regardless of brand, and this was before iPhone was available.

Very frustrating

[jpwilliams]

I'm in SF, and I upgraded from an iPhone 3G to a HTC Thunderbolt with 4G. The Thunderbolt, even brand new, has to be charged twice a day at least, and I keep things like Bluetooth and wifi off most of the time. If I don't plug in my phone at night, it will be dead by morning.

Coming from someone who carefully manages when I plug my electronics in so as to extend their usable battery life, it sucks to have to feel like my phone always needs to be plugged in.

Is the 4g tech itself power hungry? Mine seems to have battery trouble even when I'm stationery and the 4g signal is strong.

Re:Very frustrating

[Anonymous Coward]

Coming from someone who carefully manages when I plug my electronics in so as to extend their usable battery life, it sucks to have to feel like my phone always needs to be plugged in.

>

Take your nickel-chemistry assumptions about how to treat a battery out back and shoot them. There's this new battery tech called lithium-ion -- perhaps you've heard of it>? -- used in a few devices (by which I mean everything), and it does not like discharge cycles, especially deep discharges. Keep it plugged in.

Re:Very frustrating

[Solandri]

Is the 4g tech itself power hungry? Mine seems to have battery trouble even when I'm stationery and the 4g signal is strong.

Most 4G tech is using OFDMA. It achieves higher data rates than CDMA by using heavier signal processing to extract the data signal destined for your phone out of all phones in a cell. Previously this processing required too much power for a mobile device. But low-power CPU tech has advanced enough to where it's realistic to use it on a phone. As processor power requirements drop, the power needed for 4G will likewise drop.

Re:Very frustrating

[jpwilliams]

Hate to say it, but I just got served!

  http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries

Good article. I thought it was bad to keep it plugged in and good to let it run. Turns out it's the opposite!

Anyone know if the same applies for laptops?

Re:Very frustrating

[norpy]

The power usage of an LCD is by far dominated by the creation of light, the number of pixels will increase power consumption but not by anywhere near as much as the bigger back light.

I miss the good old days

[Freaky Spook]

Where your phone would last a week on stand-by and you wouldn't have to hang around the single power socket in the airport departure lounge with all the other smartphone junkies waiting to charge your phone.

Re:I miss the good old days

[QuasiSteve]

You mean you miss the good old days where your phone was just a phone and texting capabilities was a luxury?

Because you know they still sell those, right? And those now get two weeks to a month.

Let's face it, the reason our fancy phones with internet, apps, etc. don't last very long is two-fold...
1. They do use more power - not much you can do about that right now unless you want to give up the capabilities again.
2. We keep wanting smaller and/or thinner phones. I promise you that if people would accept a phone half an inch thick again, battery life would be much improved - simply by virtue of being able to fit a much, much greater capacity battery.

Re:I miss the good old days

[Ayanami_R]

I would gladly take a "bulky" device with a ton of battery. I don't understand the the tablet manufacturers all trying to copy the thinness of the fruit product. Keep them relatively slim, but kill em on battery life. Take the transformer, it's thin enough and light enough. Now that they CAN make it slimmer than the fruit product DONT, fill the space with frigging battery!

keeping 4g off should be automatic

[Anonymous Coward]

The phones should really keep 4g off (& just stick to edge) unless you actually unlock your phone & start using network apps (e.g. you open mail, etc). Leave push notifications always on the most battery-efficient network available (wifi, edge, 3g, 4g, etc) & only turn on the faster networks when the apps are in focus & need them (e.g. browser, e-mail, etc) or if there's a background app that requests to use the highest-bandwidth connection available.

yes, yes - there's a latency to turning on & associating the faster radio. however, that would only be noticed in the launch first bandiwdth-heavier app after phone unlock scenario. your standby time would be waaaay better.

Re:enormous battery FTW

[quacking duck]

The fact you're on coast-to-coast flights (5-ish hours) should actually *increase* battery life for that charge, since you're in airplane mode and it's not hunting for cell or wifi signals.

You're probably watching video or playing games more during the flight than you'd be running around on the ground of course, but I'm amazed how little battery is used when I watch an hour-long show on my iPhone while on the gym machines--less than 5% drained. For comparison, browsing the web or using Facebook for 30 minutes on the bus will eat 10%.

Re:4G = bye bye battery

[TubeSteak]

TFA talks about the Droid Razr Maxx's crazy long standby, talk, and video playing time. Its secret isn't any secret at all.
They took the dangerously thin Droid Razr, added less than 2mm in thickness, and then filled that space with a battery almost twice as large.

3300 mAh vs the smart phone standard of ~1700 mAh.
Designers refuse to make phones thicker in order to accommodate larger batteries.
The Razr can get away with it because, for it, "thicker" is the normal size of other phones.

Not so fast

[MrEricSir]

I'm typing this on a MacBook Air, which gets about 3x the battery life of my previous laptop. And the room I'm in has CFL bulbs which are about 1/4 as power hungry as the old fashioned bulbs.

So no, newer electronics don't *always* use more power.

Re:Android spergs

[larry bagina]

That's right. They should ignore the 37 million iPhones sold last quarter and bet it all on the advice of a dipshit posting anonymously on an internet message board.

Re:Apple again

[Baloroth]

The battery life problem, if you bothered to read even the summary instead of jumping to the comments to defend Apple, is because there isn't regular 4G coverage everywhere yet. In order for there to be an incentive to develop such widespread coverage, there must also be people willing to use that network (no massive network can be established entirely without users.) This means the only way good 4G coverage can ever happen is if there are issues with it in the early life cycle, and without those early adopters widespread 4G will never happen.

So, without Android adopting 4G, Apple would never be able to follow suit, unless they want to receive the same complaints. Not that that would stop them, necessarily. Did you like all those dropped calls with the early iPhone because you were stuck on AT&T?

Not true

[SuperKendall]

The iPhone - and it really was the first in this category - got people to charge their phone every single night.

That's not the case.

I've had and iPhone since the first one, and I've usually only gone to charge it every three days or so. That's with moderate email/web/app use.

It's less time than other dumb phones but much more time than smart phones of the time (like Treo or Windows Mobile) offered. The realistic multi-day battery life was a huge draw early on, exactly because finally there was a smart phone you DIDN'T have to charge every day.

Re:Not true

[SuperKendall]

As I said I use my phone daily. I currently have an iPhone 4 (not 4s) and I only plug it in to charge about every three days. Again, this is moderate web/email/app use (I don't make many calls either).

I think the 4 is somewhat better charge-wise than the 3Gs (which I also had).

At this point the 3Gs battery may simply be getting weaker, you could have it replaced fairly cheaply.

Re:Apple again

[tlhIngan]

So, without Android adopting 4G, Apple would never be able to follow suit, unless they want to receive the same complaints. Not that that would stop them, necessarily. Did you like all those dropped calls with the early iPhone because you were stuck on AT&T?

Two different issues.

First, Apple chose not to go LTE for one very good reason - the current LTE chipsets suck.

Here's the thing. LTE is a data standard. It doesn't define a voice standard, and there's proposals on how to do voice-over-LTE. And people want to do voice calls. So LTE phones right now hop onto the UMTS (or CDMA) network in order to handle a voice call, while doing LTE for data. The problem is that LTE phones now need two chips - one to do LTE, another to do 3G/voice (ever notice how the LTE versions of phones are always larger? It's not just the larger battery). The iPhone doesn't have enough space for another chip. Plus the extra chip takes power.

Now, Qualcomm has announced their roadmap that has a combined LTE/UMTS/GSM/CDMA baseband (listed as LTE+voice) in a single chip, which is anticipated to be in the next iPhone.

As for AT&T's dropped calls - it was because of over-aggressive power management from iPhones causing the control channel to be congested (which leads to dropped calls everwyhere in general). The irony being that the cells on AT&T were very underutilized (30-40%) but the control channel being completely saturated means dropped calls, slow data and other things.

As for who drives things - well, the carriers work with handset manufacturers. The carriers want to deploy the Next Big Thing that can charge customers more money for, and since Apple's basically an untouchable (the carrier bends to Apple's will), they work with HTC and others to stick in new chips to try to get people to pay more for a new network.

LTE deployment is quite interesting. When the (original 2G) iPhone came out, the 3G deployment in North America was quite spotty (the North American carriers chose 2G+ technolgies prior to the proper 3G rollout), but quite solid in Europe and Asia. These days, LTE deployment in North America is far more than Europe and Asia

Re:When camping, use airplane mode.

[AdamHaun]

I've never understood why a receive-only technology is disabled by something meant to stop emission of radio waves...

Radio receivers use a local oscillator to demodulate the signal. This oscillator can radiate interference. Here's some more info:

http://en.wikipedia.org/wiki/Superheterodyne_receiver#Local_oscillator_radiation

Re:Wrong, upgrades would happen anyway

[Bazer]

I'm in Central Europe and there has been complete 4G coverage in major cities before Apple even considered using it in the next iPhone. These days I can get 4G coverage in the outback (and I do need my tubes to be HD in there). Please don't excuse carriers in the US for not upgrading the infrastructure. They're robbing you blind.

Signal strength

[Kupfernigk]

I suspect this is an infrastructure issue. Phones need to use more power to talk where the tower signal is weak. My wife's phone goes days without needing recharge (strong signal for her carrier) while my company BB only lasts two days (weak O2 signal at home, stronger at work) and needs a daily charge in rural Devon where the signal is frequently missing.