ASUS routers (ac86u/ac87u/etc) - battery drain fix

iforgotmyusername · Nov 12, 2015

I mainly work at home, so pretty much on wifi all of the day except for the odd hour or so to do school runs. I noticed that with WIFI on, i'm getting terrible battery life - less than 24hrs. This is with most things disabled (location history, google now, etc) but wifi and mobile data on all the time and GPS enabled. Of course mobile data doesn't kick in until i leave my wifi zone. Unfortunately even with location services off, Samsung doesn't have a option to disable the always scanning totally. This means ONLY when you are out of wifi connectivity will the always scanning option turn off (assuming you have the "allow always scanning" in the wifi settings turned off). Lo and behold with this setting (always allow scanning - when wifi on only) and spending more time on mobile data i notice my battery life is infinitely better. I went from the usual 30° battery drain slope to a flat line barely draining battery. So with no other change in apps/settings/etc, and just turning my wifi off, so LTE kicked in and phone in same location in the house i practically doubled battery life.

So then i started looking and reading. Finally it is clear it is my router/wifi draining the bloody battery so i started delving deeper. Now i have an asus ac68u with stock firmware. I changed the DTIM as follows under Wireless->Professional tab - (i can't post links or images so use the below in your browser)

193.104.35.163/asus.png

Now i'm back to a flat line drain on wifi.
May work for others.

Octa_core · Nov 12, 2015

(sigh)...my router doesn't let me configure those settings (ea9200). Still getting the drain

iforgotmyusername · Nov 12, 2015

There could be multiple reasons for battery drain so this is not the holy grail for battery drain issues.

However the router issues is easy to identify. If you're getting battery drain for no reason at home/work where you are on wifi coverage, just switch wifi off and go onto your mobile plan (assuming you have reasonable 3g/4g/lte service) and look at your battery graph before and after. If you go from a ski slope to a flat line, then you have wireless problems. Otherwise look elsewhere. Remember your 'always allow scanning' setting should be set for 'wifi only' for this test.

mbeutler · Nov 19, 2015

This fix worked wonders for me. I immediately noticed 10x better battery life on par with having wifi disabled.

qpalcb · Nov 20, 2015

iforgotmyusername said:
193.104.35.163/asus.png

Now i'm back to a flat line drain on wifi.
May work for others.

hi..could you perhaps upload the pic to dropbox and share the link here? you could use a url shortener as well

iforgotmyusername · Nov 21, 2015

qpalcb said:
hi..could you perhaps upload the pic to dropbox and share the link here? you could use a url shortener as well

I don't have a dropbox account, and i can' t post links yet so neither of that would work. Just put h t t p in front of that and it will work fine (and it's not a click bait, popup adverts, etc)

mrlooolz · Nov 25, 2015

iforgotmyusername said:
I mainly work at home, so pretty much on wifi all of the day except for the odd hour or so to do school runs. I noticed that with WIFI on, i'm getting terrible battery life - less than 24hrs. This is with most things disabled (location history, google now, etc) but wifi and mobile data on all the time and GPS enabled. Of course mobile data doesn't kick in until i leave my wifi zone. Unfortunately even with location services off, Samsung doesn't have a option to disable the always scanning totally. This means ONLY when you are out of wifi connectivity will the always scanning option turn off (assuming you have the "allow always scanning" in the wifi settings turned off). Lo and behold with this setting (always allow scanning - when wifi on only) and spending more time on mobile data i notice my battery life is infinitely better. I went from the usual 30° battery drain slope to a flat line barely draining battery. So with no other change in apps/settings/etc, and just turning my wifi off, so LTE kicked in and phone in same location in the house i practically doubled battery life.

So then i started looking and reading. Finally it is clear it is my router/wifi draining the bloody battery so i started delving deeper. Now i have an asus ac68u with stock firmware. I changed the DTIM as follows under Wireless->Professional tab - (i can't post links or images so use the below in your browser)

193.104.35.163/asus.png

Now i'm back to a flat line drain on wifi.
May work for others.

I have the same router as you and I went to the professional tab. Then what do I do with the IP you posteD? I think this solution is the right one guys but I haven't figured it out yet

edit: Did not work

godzigga · Jan 9, 2016

mrlooolz said:
I have the same router as you and I went to the professional tab. Then what do I do with the IP you posteD? I think this solution is the right one guys but I haven't figured it out yet

edit: Did not work

Paste the IP in your browser to show the screenshot he took with the settings he changed. Basically you need to set the DTIM Interval to 3 and the Beacon Interval to 300 for both the 2.4 GHz and 5 GHz bands.

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ASUS routers (ac86u/ac87u/etc) - battery drain fix

iforgotmyusername

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Octa_core

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iforgotmyusername

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mbeutler

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qpalcb

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iforgotmyusername

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mrlooolz

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godzigga

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