T3-What's your best battery run?

[pigburger]

I did a heavy endurance run with my T3, underclocking the system with pxaclocker lite to 200mhz and isilo to 133, turned the screen down all the way and managed to get 5 hours and 35 minutes according to Batterygraph. Probably could have gotten even more out of it except for I had to reset it (first time in a week) and pxaclocker lite doesn't turn itself back on automatically. My question is, is this unusual, or have others experienced pretty respectable battery life with their T3s?

[n0m0n]

Well compared to my NX80v the T3 does not last as long charge time to charge time.
I also found that the NX80v's battery seems to hold more juice when fully charge then the T3's.
so for me I will be testing the T3 again before I call Palm to get some information.
I think that my unit be faulty since I can be at 80% and within 2 minutes drop to 75% just by monitoring the Batterygraph app.
Drastic drop if you ask me...

[knowledge]

I get about 4 hrs at 50% brightness using lightspeed. I clock most apps down to 135mhz.

[n0m0n]

Ok, I just placed my NX80v into the charger because I ran it down to 5% in 8 hours & 58 minutes.
I guess I need to do something as to over under clocking my T3 because I can't even get half of that with it.

[SoS]

Originally posted by n0m0n
Ok, I just placed my NX80v into the charger because I ran it down to 5% in 8 hours & 58 minutes.
I guess I need to do something as to over under clocking my T3 because I can't even get half of that with it.

Jeff, what is the battery mAh rating for the NX???

I reckon 4 or 5 hrs for the T3 sounds pretty good, even if underclocked etc. My T|T will do 4.5 hours but only on 'emergency rations' so to speak...

[n0m0n]

At 100% Batterygraph says the NX80v is 4200mV.
The T3 is at 4010mV.
Where do I find the mAh rating?

[SoS]

It may be in the specs that come with the machine...I know its difficult to find this info for Palm machines....

[knowledge]

I think it is 900mAh.

[SoS]

Originally posted by knowledge
I think it is 900mAh.

ok, so the same as the T|T series (all 900mAh)...interesting

[wdunn]

Using PXA Clocker 3.0 Lite, clocked at 200, 30% brightness, I'm at 4.04 hours with battery at 19% with normal usage, bluetooth, etc...but after having the unit off for 1 1/2 hours, my battery now reads 52% before settling at 45%. Have noticed this discrepancy with the battery indicator before. Anyone else have this issue with the battery indicator??

[pigburger]

When I got the 5.5 hours, it never dropped below 25% but eventually would not power on until I put it on a charger. I think it might be some type of quirk.

[knowledge]

Originally posted by wdunn
Using PXA Clocker 3.0 Lite, clocked at 200, 30% brightness, I'm at 4.04 hours with battery at 19% with normal usage, bluetooth, etc...but after having the unit off for 1 1/2 hours, my battery now reads 52% before settling at 45%. Have noticed this discrepancy with the battery indicator before. Anyone else have this issue with the battery indicator??

I have noticed the same discrepancy. It doesn't make alot of sense.

[SoS]

I get the same effect on my T|T...presumably there is a lag in the re-calculation of available charge when you quit a program, drop a BT connection etc....

[dbump]

Originally posted by wdunn
Using PXA Clocker 3.0 Lite, clocked at 200, 30% brightness, I'm at 4.04 hours with battery at 19% with normal usage, bluetooth, etc...but after having the unit off for 1 1/2 hours, my battery now reads 52% before settling at 45%. Have noticed this discrepancy with the battery indicator before. Anyone else have this issue with the battery indicator??


I've noticed measurable performance 'recovery' like that in other rechargeable batteries (cordless electric razor, for example). So it may have more to do with battery chemistry than the indicator. I believe temperature can have a significant affect on the measurements that the battery indicator is based on, so that may come into play as well.

Some good info on Li-ion-polymer batteries on this page, and in the whole FAQ in general:
http://www.buchmann.ca/Chap10-page6.asp

Sounds like we all have less than 3 years to find a replacement for our T3s (or a replacement battery for the brave). Be then, of course, the T3 will look as dated as my Visor Deluxe does now...

[SoS]

Originally posted by dbump
....I believe temperature can have a significant affect on the measurements that the battery indicator is based on, so that may come into play as well....

I suspect this may be the major cause. 'Feels' like it would have effect over the sort of time periods that I have noticed..very good point!

[wdunn]

Well, ended up getting a little over 6 hours of usage using PXA Clocker 3.0 Lite clocked at 200, 30% brightness with normal usage (on/off/some bluetooth, etc) but the battery indicator continued to be all over the place during this time as well.

[FIA WRC]

Using Energy Dimmer set at 40% and doing reading and games I can get 3 hours out of the T3. Haven't tried underclocking yet.

[hiro]

Originally posted by wdunn
Using PXA Clocker 3.0 Lite, clocked at 200, 30% brightness, I'm at 4.04 hours with battery at 19% with normal usage, bluetooth, etc...but after having the unit off for 1 1/2 hours, my battery now reads 52% before settling at 45%. Have noticed this discrepancy with the battery indicator before. Anyone else have this issue with the battery indicator??

Every battery technology that I'm aware of has a lower voltage when the battery is being discharged than when it's at rest (and a lower voltage at rest than when being charged). I believe it happens because the chemical reaction can't quite keep up with the demand for current.

The effect is more pronounced in alkaline batteries than in NiCds or NiMHs, due to the construction of the battery. Alkaline batteries have a central carbon (I think) rod surrounded by electrolyte. NiCds and NiMHs are constructed as a very thin sandwich of two materials that is rolled up into the familiar cylindrical shape. The reaction that generates current occurs at the boundary between the two materials, so the larger the surface area of that boundary, the faster current can be generated.

Unfortunately, I don't know anything about the construction of Li-ion batteries, but they would be subject to the same voltage drop effect . How pronounced the effect is will depend on their construction and on how much current is being demanded, i.e., you'll probably see a bigger voltage drop and recovery if you use maximum backlight, Bluetooth, etc.

--Scott

[PDH LA]

OK, I took my first business trip since I purchased my T3, so I finally got to test the battery life of this thing.

I use PXA Clocker to underclock most of my apps and I keep my screen brightness at about the 33% level.

I got 4 1/2 hours of usage before getting to the 20% warning level. And this was using bluetooth for probably 1/2 hour to 45 minutes during this time.

So I now have no real concerns about battery life for my usage patterns. It was better than I expected, but I do have a Palm Power to Go in case I'm away from a power source for an extended period of time.

[PDA gadgetfreak]

Using BatteryGraph to check, I got 3 hours 33 minutes to 20% warning. Brightness is at 25%. I don't underclock. No Bluetooth devices yet and beam receive was off. Use was mixed, mostly Calendar, Contact and Docs to Go spreadsheets, played a few games and listened to some MP3's.

[xymoza]

i fully charge my t3 with the brightness set to 100 percent, no bt, with the beam on and nothing running exept batterygraph and nodozeda to keep it on, i never underclocked or overclocked it, and i got it running, continuously for 3hrs and 28 min before i reach the 20percent warning and it turned off itselt at 3hrs and 40min. can anybody give a comment on my t3's battery performance. your comment would be a big help for me to know its performance tnx guys!

[RikD]

I must be one of the few who don't think there's a problem...

Playing "Top Of The League" for 2hrs (maybe 2.5hrs) with BTTogglePro ensuring no BT, and leaving the device in 320x320 mode the battery only dropped from 83% to 57%.

This is better than I used to get on my Clie SJ30.

But when browsing via BT and my phone power drop is much more than the Clie (with BT MemoryStick), as I see 50% battery drop in less than 40mins. (compared with about 30% on Clie). Although if I leave the TT3 off for another few hours the battery seems to steal back another 10% or so....

RikD.

[xymoza]

Originally posted by RikD
I must be one of the few who don't think there's a problem...

Playing "Top Of The League" for 2hrs (maybe 2.5hrs) with BTTogglePro ensuring no BT, and leaving the device in 320x320 mode the battery only dropped from 83% to 57%.

This is better than I used to get on my Clie SJ30.

But when browsing via BT and my phone power drop is much more than the Clie (with BT MemoryStick), as I see 50% battery drop in less than 40mins. (compared with about 30% on Clie). Although if I leave the TT3 off for another few hours the battery seems to steal back another 10% or so....

RikD.

i think its logical and it means that bt really consumes lotz of you bat power and perhaps the reason why palm didnt integrate a wifi on t3 is becoz it consumes more power that bt.

bdw have u tried using lightspeed? im testing the demo version of it and ill tell you guys what would be the result

[pigburger]

I noticed a big hit with bluetooth, though I think having the screen cranked all the way up is a bigger drain than BT.

[xymoza]

Originally posted by pigburger
I noticed a big hit with bluetooth, though I think having the screen cranked all the way up is a bigger drain than BT.

i just wnt to know if you have tested it? :)

[xymoza]

Ok here is the result of my first battery test. I fully charge my t3 then put the brightness setting to 100%, no bt and with the beam receive off, my slider is close, then using the trial version of lightspeed I underclocked my t3 to 100/200. the apps running are lightspeed, nodozeda (to keep it on) and batterygraph (to monitor my battery voltage, etc.). it runs for 4 hrs before I got the first ‘battery low warning’ and then it turned itself off after another 13 min.

Second battery test result (with the same configuration with my first test, except that I disabled the lightspeed) it runs for 3 hrs and 43 miinutes before I got the first ‘battery low warning’ and then it turned itself off after another 13 min.

There is one thing I’ve noticed, right after I remove my t3 on the sync/charger cradle the voltage dropped to 4280 mV to 4230 mV and after 5 minute its 4200 mV. Can anybody give a comment on this pls. Tnx