920t battery life sucks.........

[KOTULCN]

I just switched from the 910 to the 920 and I might be going back. 2 days in a row I have gotten 2 hours of use before the 920 shut off. What kind of battery life are you guys getting? what are your settings? does the traffic rciever eat up alot of battery?

 

[KOTULCN]

what kind of battery life are you guys getting? how are you charging your 920, and for how long? I just took mine back to BB and exchanged it since I only had it 2 days, so I left it on until the unit turned itself off and I am charging it via the usb cradle as I type this. I called tomtom today and they said that you shouldnt leave it docked for more then 2-4 hours as it will screw up battery charge capacity. I thought this was wierd since I leave my go 910 on the charger all the time, and have never had less then 4 hours of battery usage! This wouldntbe a huge deal except that the windshield mount doesnt have a port to plug in the charger and I hate having to unplug it everytime I get out of the car!!

 

[Boyd]

I don't think I've ever run mine anymore than an hour or so on batteries but have never seen it shut down. I leave it plugged into the car charger most of the time, although there's an issue with that. It totally wipes out my AM radio reception when plugged in, so when I want to listen to Bloomberg or another AM station, I unplug it.

You might try turning down the screen brightness if you want longer battery run time.

 

[Pedro2NR]

yeah my 920 does drain battery faster than my 910.
I also recommend lowering the brightness on the unit.
If you aren't using the bluetooth, disable it.

 

[ryanbrancel]

It has a smaller battery (something like 1340 mAh compared to 2200) and bluetooth is usually turned on to get the remote to work, so I guess I'm not surprised. Switching from a 20 GB hard drive to a 4 GB flash doesn't save a huge amount of power either, not that was the primary intent (i.e. trim the size).

 

[ex-egll]

Must admit the battery life is poor. The advertising says upto 5 hours, but mine died after 100 minutes, was not impressed. Guess its time to make up some cables.

 

[will]

... I called tomtom today and they said that you shouldnt leave it docked for more then 2-4 hours as it will screw up battery charge capacity. ...

I find this really odd for TomTom to be saying. The batter is Lithium Polymer and does not have a "memory" problem, so leaving it docked for hours, or just minutes at a time shouldn't be a problem. The real problem is the smaller battery capacity (unconfirmed) combined with this type of batteries quick discharge rate as compared to other types, including Lith-ion.

Every reviewer/forum poster I found on google reported getting about 2 hours of use. I'm also getting about the same ~90 min to 2hrs.

Read more about Lithium Polymer batteries

 

[infama]

It has a smaller battery (something like 1340 mAh compared to 2200) and bluetooth is usually turned on to get the remote to work, so I guess I'm not surprised. Switching from a 20 GB hard drive to a 4 GB flash doesn't save a huge amount of power either, not that was the primary intent (i.e. trim the size).

Actually, if it's the same as the 520, the battery is a Sony 1320mAh lithium-ion unit.

See for yourself at :
https://gullfoss2.fcc.gov/prod/oet/forms/blobs/retrieve.cgi?attachment_id=800735&native_or_pdf=pdf

 

[andygold]

I called tomtom today and they said that you shouldnt leave it docked for more then 2-4 hours as it will screw up battery charge capacity. I thought this was wierd since I leave my go 910 on the charger all the time, and have never had less then 4 hours of battery usage!

Quoted KOTULCN, but this is to the general readership......If 2-4 hours is the max according to TomTom, what about when you are doing an extended drive? I sometimes drive 6 hours straight without stopping. Does the usage of the unit (while it's plugged into the cigarette lighter) negate the 2-4 hour rule? Do they expect us to occasionally unplug the unit during a trip to let the battery discharge?

 

[infama]

I think they mean docked to the computer or to an AC outlet.

 

[mrlong]

I shut off my bluetooth and data and it lasted longer.

 

[mhuebner]

battery life is not that good

 

[chuck41]

battery life is not that good

Turned mine on at 10:15 this morning to view slideshow.
Battery shut off at 1:30.

That's 3 hours and 15 minutes total battery usage.

Previous times I have used it off a power cord was similar or a bit less.