12-29-2012, 10:08 AM #6
- 473 Posts
I thought the wireless charger shut down when the 920 battery is fully charged.... either that or it just changes over to a trickle charge...
Regardless, been keeping my phones on the charger overnight for years without any issues.George Ponder
Reviews Editor - Windows Phone Central
- 12-29-2012, 12:01 PM #7
the wireless charger indeed turns off. when you first put your phone on it it has a white light, meaning it's charging. when phone is full the light will turn off. it will then turn back on from time to time to top the phone off again from the battery used while in standby.
- 12-29-2012, 12:52 PM #8
The Nokia Lumia 920 user manual states the following in the battery safety section:
When your charger is not in use, unplug it. Do not leave a fully charged battery connected to a charger, as overcharging may
shorten the battery’s lifetime. If left unused, a fully charged battery will lose its charge over time.
12-29-2012, 01:18 PM #9
- 26 Posts
Leaving a Lithium battery at 100% does shorten its life. I usually try to charge my batteries so that they reach full just before I need the device. With the type of battery in most phones the shortening appears to be less than what is often used in laptops.
I know that my 920 gets quite hot when on the wireless charger. On the pad for a couple hours gets the screen to ~32°C (90°F) and the back to ~41°C (106°F) according to my IR thermometer. In contrast, charging with the supplied wired charger the screen gets to only 25°C (77°F) and back to ~27°C (81°F). While this temp is within spec for most Lithium batteries the higher temperature causes the electrolyte to degrade much faster than at lower temps. The higher temps will cause the battery life to shorten much faster than sitting at 100% for the same time period.
- 12-29-2012, 04:11 PM #10
12-29-2012, 05:43 PM #12
- 9 Posts
Please Start using Battery saver option available in Nokia lumia 920, I started to use this option and i am able to really save battery life.
Batter saver works like when you open any application then the application will be running in your device and no service or application runs at background and utilize your wifi or Data connection which ultimately reduce the usage of your batter power!! I am using this for the last 3 days!!
- 12-30-2012, 02:00 AM #14
The only thing that's bad is when you have a wireless charger next to your head on the night stand. And then it's bad for you, not the phone. The wireless chargers induce a strong electric field that you don't want acting on your body all night. The charging plate is able to charge the Lumia from several inches away - that says it all.
- 12-30-2012, 10:06 PM #16
I do it all the time, but then again I also had my Focus S battery nearly light my pants on fire on the way home from Church, causing me to be truly tested in my "no foul words" rule.
Maybe I am not the best person to post on this thread......I find your lack of faith disturbing. - Darth Vader
- 12-30-2012, 10:19 PM #17
Leaving it overnight does effect your battery in a negative way. You get shorter battery life per charge.
A moderator from iMore has a tech site which this was discussed.
12-30-2012, 11:21 PM #18
- 87 Posts
Well I put mine on the charger every night and take it off on the morning. Use it all day, repeat. If it shortens the battery life a bit I don't care. I, as will most everyone else, upgrade my phone in a year or two so I don't care. The convience of an overnight charge is worth it. My phone is a tool to aid me in my life. Worrying about taking it off the charger the moment it gets to 100% is something that adds complexity to life, not simplifying it.
So for me, I'm not worrying about it. With my use it will likely last until the next upgrade and that's all I want. If it doesn't, well, time will tell and I will have learned a lesson to apply to my next phone. This has been my routine since my first smart phone I bought in 2003. Until then I chose to get on with life rather than worrying about the battery.
12-31-2012, 04:46 AM #19
- 272 Posts
Thank you everybody. I've always used Battery Saver since WP7. The downside of that is not being able to keep Wifi alive. I guess I'll try not to leave it overnight so often. That's probably what shortened the battery in the first phone.
Sent from my Nokia Lumia 920 using Board Express
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