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188 posts

Master Geek
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Topic # 171958 6-May-2015 21:57
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Hi, my phone is behaving a bit oddly and I'm wondering if anyone out there can offer an explanation. I've posted this on the 2 Degrees forum because that's my cellular provider, but if the thread belongs on another forum, mods please move it.

I'm using a Motorola RAZR M, about 2 years old, on 2 Degrees prepaid. At my house in the Marlborough Sounds, it struggles to get any reception and normally tops out at 1-2 bars (roaming to Vodafone). That's no fault of the phone; most cellphones do not get any reception at all around the house. In any event, if I don't plug the phone in overnight, its battery will drop about one-third of its stored energy by morning.

In Nelson it gets better reception (doesn't roam to VF) but its battery behaves similarly to how it does in the Sounds.

In Auckland, even if I start at the end of the evening with a full battery, if it's not plugged in overnight, it tends to be either completely dead or at best at <15% battery capacity by morning. Reception is not flash in this apartment - 1-2 bars - but it's steady and works fine for both phoning and tethering over 2 Degrees 4G.

Tethering is OFF overnight so that's not what's depleting the battery. WiFi is generally off in Auckland; certainly off overnight.

At my place of work in Auckland I've got 4 bars reception but even there, the phone seems to chew through its battery at a rate of knots - and it seems to get warmer than normal.

I thought perhaps the Textra txt management app I had recently downloaded was doing something odd so I uninstalled it, but that's made no difference.

I wondered whether the battery was reaching the end of its life, but the phone continues to behave well when it's in Nelson or the Sounds.

The OS is Jellybean. The phone doesn't think any updates are available, even though Jellybean is quite old.

Any suggestions?

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n4

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Ultimate Geek
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  Reply # 1299508 6-May-2015 22:12
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Try disable 4g?




Huawei Mate 7, on 2degrees

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Master Geek
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  Reply # 1299513 6-May-2015 22:15
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How many apps do you have running in the background that are constantly transmitting 3/4g data?
What happens if you disable data connections overnight?




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Master Geek
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  Reply # 1299519 6-May-2015 22:24
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I had briefly considered, but then discarded, the idea that my phone was transmitting data, mainly because I don't seem to be depleting my data pack, but you've got a point.  My data pack is a "Zone" pack, not valid for roaming.  Therefore I keep data roaming off, so the phone is not transmitting or receiving 4G data at the Sounds.

The phone is fully charged.  I'll try switching data completely off tonight, leave the phone off charge and see whether it's run its battery down tomorrow morning.



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  Reply # 1299593 7-May-2015 07:00
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I'm in Auckland now. Last night I turned data OFF, left the phone 100% charged and unplugged, and this morning the battery had gone flat. When I tried to wake the phone up to see just how nearly flat, it shut itself down.

So between this, and the fact that there's never been an unexplained diminution of the data left in my pack, I reckon the problem does not lie with data usage.

Stu

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  Reply # 1299603 7-May-2015 07:39
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Could you be connected to a 2G network in the Sounds, and a 3G network in Auckland? Not talking data, just voice networks. Can you limit the connection to GSM only overnight, and see if that makes a difference?




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Geek
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  Reply # 1299634 7-May-2015 08:30
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Most android phones let you go into the settings then within the battery section it can try and tell you what part of the system is causing the most battery drain. That might help?



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  Reply # 1299726 7-May-2015 10:48
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1. In the Sounds I am definitely on a 3 or 4G connection. No 2G connection is possible at that site.

2. I've looked at the what's-using-the-battery function many times, and IIRC it's always Phone idle > cell standby > Android OS > screen, anything else hardly registering. I'll see if I can reset this and get measurements from shorter time intervals.

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  Reply # 1299920 7-May-2015 15:08
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kiwigander: I had briefly considered, but then discarded, the idea that my phone was transmitting data, mainly because I don't seem to be depleting my data pack, but you've got a point.  My data pack is a "Zone" pack, not valid for roaming.  Therefore I keep data roaming off, so the phone is not transmitting or receiving 4G data at the Sounds.

The phone is fully charged.  I'll try switching data completely off tonight, leave the phone off charge and see whether it's run its battery down tomorrow morning.


Just having mobile data switched on depletes battery. When I'm on WiFi I tend to switch my mobile data off (4S) and at home this makes a big difference as I'm right in the middle of 3 XT towers (on Skinny).

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Ultimate Geek
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  Reply # 1300086 7-May-2015 19:20
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Stu: Could you be connected to a 2G network in the Sounds, and a 3G network in Auckland? Not talking data, just voice networks. Can you limit the connection to GSM only overnight, and see if that makes a difference?


+1 the above principle. I find that switching my android from 3G to 2G makes the battery last heaps longer (data disabled in both cases). There are a lot of factors and variables at play when you change location and we can only speculate on which it may be.

Your phone attributes it to cell standby, and there is no reason to doubt that.  

Even when idle, the battery consumption will be higher when your transmitted signal (from the phone) to the cell site is weak. This is not necessarily always proportional to the quality signal your phone receives from the cell site, which is what your signal bars shows so your signal bars being similar in both locations doesn't eliminate signal strength from the equation.

Your phone is likely to be doing more frequent cell hand overs back and forth, consuming more battery. Despite your phone being stationary on the table, out side factors such as cell site breathing/loading, interference and large vehicles moving nearby can cause this. In The Sounds there is probably only 1 site and 1 frequency band for your phone to use, but in Auckland there is possibly 3 frequencies, and 1/2 dozen sites for it to switch between.

[Edit: Spelling mistakes]

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  Reply # 1300160 7-May-2015 20:51
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It sounds like there could be an app that is draining your battery.

You need to check if your phone is sleeping. Here's a link to the app you need to install and it will find any rogue app that is preventing your phone from sleeping.

https://play.google.com/store/apps/details?id=com.uzumapps.wakelockdetector

Sorry can't hyperlink on mobile site.



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Master Geek
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  Reply # 1301307 9-May-2015 23:49
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Update (and acknowledgement of poster n4's comment):

I think I've isolated the problem.

In Wireless & Networks > Mobile networks > Select network I ticked Automatic (3G/2G), which of course unticked Automatic (4G/3G/2G). Charged the phone, left data ON, left the phone overnight. In the morning the battery was reading 86% charged.

My wife's RAZR i, which is not 4G-capable, has been behaving just fine in Auckland.

And I've confirmed that the signal I get in the Sounds (where I've never had that battery-draining problem) is 3G, not 4G.

Of course I'll keep an eye on it, but it looks as if 4G is the culprit in Auckland.

Next thing to test, I suppose, is whether 4G causes the same problem in some other location. Thanks to all posters for your advice to date.

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Ultimate Geek
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  Reply # 1302234 11-May-2015 19:56
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Thanks for following up with the problem/solution.

Google it and found this: Why LTE sucks your battery

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