Fully Working!!! AUTO DATA DISCONNECT after 60 seconds. SAVE BATTERY LIFE!

mikenerd · #1 (**permalink**) 01-27-2009, 08:30 PM

How much battery does this actually save? I have my email check the server every 30 minutes.Thanks

**schettj** · #2 (**permalink**) 01-27-2009, 09:04 PM

Quote:

Originally Posted by mikenerd

How much battery does this actually save? I have my email check the server every 30 minutes.Thanks

Virtually none, or it actually makes it worse depending on how often you have things using the internet in the background.

Push email - will never go idle, so no disconnect
Periodic checks, NET LOSS since the startup time to re-connect data is longer, and much more power draw, and now happens every 15, 30, or 60 minutes.

If you only use your data once or twice a day, you might save 1-2% battery in 12 hours. Maybe.

The other issue is caused by advanced config (blows some setting, it's putting a GSM-specific value in) - reg fix is in every "survival guide" I've seen, including the sticky here in this forum.

Bottom line, don't bother. But +1 for the find.

bog3nator · #3 (**permalink**) 01-27-2009, 09:17 PM

i can tell you from using the setup of having my data connection shut off after 1 min for 2 weeks now, and i had my phone with it on or default for 2 weeks before that. from what i have seen it saves a ton of battery use.

**schettj** · #4 (**permalink**) 01-27-2009, 09:33 PM

Quote:

Originally Posted by bog3nator

i can tell you from using the setup of having my data connection shut off after 1 min for 2 weeks now, and i had my phone with it on or default for 2 weeks before that. from what i have seen it saves a ton of battery use.

Well, if you actually measure the draw of the connected but idle mode vs not connected, you will see that it is essentially identical. Then measure the draw of re-connecting vs coming out of idle and you will see the draw is much higher, and longer to re-connect then to come out of idle. Net battery loss for anyone who connects often (many times in an hour, for example)

I'm glad it works for you.

mxl180 · #5 (**permalink**) 01-27-2009, 09:49 PM

Quote:

Originally Posted by schettj

Well, if you actually measure the draw of the connected but idle mode vs not connected, you will see that it is essentially identical. Then measure the draw of re-connecting vs coming out of idle and you will see the draw is much higher, and longer to re-connect then to come out of idle. Net battery loss for anyone who connects often (many times in an hour, for example)

I'm glad it works for you.

Correct if you measure the power draw of connected but idle vs disconnected...there's no difference. BUT try to measure standby connected vs standby disconnected. I dont know how measure this with windows mobile, but I can measure it with PalmOS and there's big difference.

bog3nator · #6 (**permalink**) 01-27-2009, 10:06 PM

eh i say for anyone that wants to try it, go ahead and do it. it wont hurt anything and u could just change it back if u dont like it. i noticed alot more battery being saved, but i also turned off checking my email except like twice a day and turned off auto updates on just about everything.

as far as the longer re-connects go, it does take alittle longer, but it only adds probably a few seconds or so....good luck!

bog3nator · #7 (**permalink**) 01-28-2009, 08:49 PM

i just did your tweak and had someone call me while i was on the internet, the phone rang but would not let me pick it up?

mxl180 · #8 (**permalink**) 01-27-2009, 09:16 PM

Quote:

Originally Posted by mikenerd

How much battery does this actually save? I have my email check the server every 30 minutes.Thanks

If you check email alot... probably not much.

BUT if your phone is in sleep mode. Does a constant data connection intermittently take it out of sleep mode?

In the Palm OS, even though the display screen was off, and if there was a data connection in the background it would NOT allow the system to fully goto sleep. Draining @ 85 mah instead of 10 mah...while the device is suppose to be in standby.

midiology · #9 (**permalink**) 02-08-2009, 08:46 PM

Quote:

Originally Posted by mikenerd

How much battery does this actually save? I have my email check the server every 30 minutes.Thanks

The Keepalive on these phones do not eat hardly any battery,,, the phone is not constantly connected to the network for data,,

what it does is when it connects it sends a syn,, the network replies with an ack,, then a syn/ack agreement is made,, the device is assigned an ip address,, that address is cached in the network along with the mac address, esn, and phone number of the phone,, the phone will set idle and basically hang up the connection,, every so often the phone will beacon,,, ie, send a syn packet to the server,, the server will in response update the ip cache it has stored and then the connection goes dormant/standby again,,

basically what Im saying is that even if data stays on all day you are looking at a small percentage compared to not on,,,

I paused all my email yesterday,, and left data off all day saturday,,, and from 8 am to 4 pm i had 38% battery left,,, with my normal calling that I do,,
today I turned my email back on left data on all day,,, from 8 am to 4 pm I had 40% battery left,, granted I think I made a couple less calls than yesterday,,, but basically if data was sucking down my phone like a call would then I would have been much much lower percentage than that after turning the data back on...

so dont sweat it too much