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| The Following User Says Thank You to jbenny For This Useful Post: | ||
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2008-05-08
, 18:44
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Posts: 538 |
Thanked: 168 times |
Joined on Dec 2007
@ Seattle
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#192
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Originally Posted by bunanson
I'll try it out this weekend - I use my precious much too much during the week to be able to live without it long enough to test this - I'm quite confident that I will see a lot more time than you are seeing. I'm thinking I'll get more like 12-15 hours.
Hey, PCQ and anybody using any kind of battery extender, please run it at max screen brightness and almost max audio and any streaming video (streaming also using WiFi), and see how long can you run with your setup, a freshly topped N800 battery, please use genuine battery and specify your configuration, plus your battery extender/charger or what not, see how far can you go before your N800 quits. Mine, N800 battery + 2 AA 2000mAh = 2hr 15 min. I am disappointed.
bun
I'm using 4 AA Sanyo 2700 mAh batteries in the Tekkeon 1550 with an official Nokia CA-100 cable - and the stock Nokia BP4L battery that came with my N810.
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When you wish upon a star, your dreams really can come true... Unless it's an asteroid hurtling towards earth that will destroy all life.
When you wish upon a star, your dreams really can come true... Unless it's an asteroid hurtling towards earth that will destroy all life.
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2008-05-09
, 00:43
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Posts: 4,030 |
Thanked: 1,633 times |
Joined on Jul 2007
@ nd usa
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#193
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Originally Posted by jbenny
Good post.
Some time ago, I bought an Energizer brand charger that is made for cell phones. It takes two AA cells and has tips for different model phones, including Nokia. After all this discussion, I finally decided to try it out.
Running "mplayer -loop 0" with a ten minute Superman cartoon, the N800 battery alone ran for just two minutes shy of five hours (which amazed me greatly). For the last 40 minutes of that time, the N800 beeped at me every five minutes and said "low battery".
Doing the same test, but also with the Energizer supply plugged in to the N800, I got seven hours and nine minutes. This was using alkaline cells. The Energizer came with lithiums, which should give even better results. I didn't want to waste expensive lithiums on a test.
Both tests ran until the N800 shut down (sort of). With the Energizer plugged into the N800 power jack, the N800 tried to shut down, but kept rebooting. I finally hit the power button to shut it down. The N800 also did not give "low battery" warnings with the Energizer plugged in.
Not a huge difference, but for a power pack that you can hold in your palm, an extra 2+ hours isn't bad. What really surprised me was that the N800 battery alone lasted so long while playing video. I normally use the N800 for ebooks and occasional surfing and get 6-7 hours with those activities.
Mind to tell us how do you run the system? You max it out like what I did, almost max audio and max out brightness? MMC or internal flash boot? Presumably BT/WiFi off? Thanks,
bun
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2008-05-09
, 04:47
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Posts: 28 |
Thanked: 5 times |
Joined on Aug 2007
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#194
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I had the brightness set at exactly half, which is what I usually use. It seems plenty bright enough for me. The audio was 5 steps down from max. I didn't want to hear that Superman cartoon for several hours. I wouldn't think that the volume would have nearly as much impact on battery life as brightness.
I wasn't necessarily going for maxed out settings, as I wanted to see how long it would run with more typical settings.
Oh yeah, WiFi/BT off. Normal Flash boot.
I wasn't necessarily going for maxed out settings, as I wanted to see how long it would run with more typical settings.
Oh yeah, WiFi/BT off. Normal Flash boot.
| The Following User Says Thank You to jbenny For This Useful Post: | ||
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2008-05-24
, 16:30
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Posts: 4,030 |
Thanked: 1,633 times |
Joined on Jul 2007
@ nd usa
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#195
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Originally Posted by Rebski
N800 Fuly Charged battery running without Tekkeon under the same conditions, how many hours?
These are two very interesting observations.
N800 Fully Charged battery + Tekkeon 3300 = 18 to 20 hours use
N800 Fully Charged Battery + Tekkeon 1550 = 12.5 hours minimum.
The price difference between the two models is about $100 so I would not have expected the cheapie to be so good.
Itsbill, let us know the final figure?
bun
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2008-05-24
, 16:36
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Posts: 4,030 |
Thanked: 1,633 times |
Joined on Jul 2007
@ nd usa
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#196
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Originally Posted by petergunn
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Performance Comparision:
Tekkeon MP1550 + 4xAA (2000mah eneloop): 8 hours 56 minutes
SoShine BeOne + 4xAAA (900mah Soshine): 6 hours 6 minutes
Price Comparison
Tekkeon MP1550: $25 + ship + 4xeneloop => ~$45
SoShine BeOne: $9 + 4xAAA => ~$15
...
Same question: what is the baseline, i.e., just running the tablet with the same conditions/setup but without any ext batt pack? Without that piece of information, the results are less useful.
bun
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2008-05-27
, 07:20
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Posts: 90 |
Thanked: 19 times |
Joined on Oct 2007
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#197
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2008-05-27
, 08:08
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Posts: 2,152 |
Thanked: 1,490 times |
Joined on Jan 2006
@ Czech Republic
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#198
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Originally Posted by GeraldKo
This item is for powering device off but it works only if charger is not attached, otherwise it will just reboot. This is meant for situations when you (re)boot to boot menu and realize you wanted to turn device off instead.
At least if you're using fanoush's boot menu, you need to make sure you haven't selected that last option, the one about being off with no charger plugged in. I used that one the first time with my IOGear battery pack and it managed to drain the battery pack and at the same time not increase the charge in my N800.
What you expected it to do for you in this case? Also you say that you had attached power source (IOGear battery pack) when you selected this item and the device just powered off? It did not reboot immediately like it does with charger?
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2008-06-13
, 15:43
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Posts: 90 |
Thanked: 19 times |
Joined on Oct 2007
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#199
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what about this http://tinyurl.com/5olbh6 (about 5 euro) + 8 AA uniross hybrio (about 19 euro) and some diods to lower the voltage and save against the inversion recharge (many battery pack, if discharged, are recharged by the device you want to recharge !) ?
so:
2100*8=16800*1.2=20160/5.4 =about 3700mAh of capacity ?
seems not too difficult to made....
all for about 25euro.
sorry for bad english ;-)
so:
2100*8=16800*1.2=20160/5.4 =about 3700mAh of capacity ?
seems not too difficult to made....
all for about 25euro.
sorry for bad english ;-)
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2008-06-13
, 16:18
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Posts: 4,930 |
Thanked: 2,272 times |
Joined on Oct 2007
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#200
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8 * 1.2V (assuming NiCd/NiMH voltage) is 9.6 V; that, one silicon (i.e. normal rectifier) diode, and a ~9 Ohm resistor of appropriate power rating should yield a workable power supply, which will fall inside the Nokia specifications (for I-V characteristic at least).
8 * 1.5V, OTOH, is 12 V; the maximum voltage permitted is 9.3V, so this would be outside the charger spec and potentially harmful to the device.
Edit: Oh, and your calculation is wrong; the capacity in Ah is the same as for one cell, since you connected them in series. You don't pick up any by reducing the voltage with passive elements; the extra energy dumps as heat, so make sure your resistor is rated for the resulting power. (9W, if I calculate right...)
Last edited by Benson; 2008-06-13 at 16:21.
8 * 1.5V, OTOH, is 12 V; the maximum voltage permitted is 9.3V, so this would be outside the charger spec and potentially harmful to the device.
Edit: Oh, and your calculation is wrong; the capacity in Ah is the same as for one cell, since you connected them in series. You don't pick up any by reducing the voltage with passive elements; the extra energy dumps as heat, so make sure your resistor is rated for the resulting power. (9W, if I calculate right...)
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World's first inductively-charged N900!
World's first inductively-charged N900!
Last edited by Benson; 2008-06-13 at 16:21.
| The Following User Says Thank You to Benson For This Useful Post: | ||
Running "mplayer -loop 0" with a ten minute Superman cartoon, the N800 battery alone ran for just two minutes shy of five hours (which amazed me greatly). For the last 40 minutes of that time, the N800 beeped at me every five minutes and said "low battery".
Doing the same test, but also with the Energizer supply plugged in to the N800, I got seven hours and nine minutes. This was using alkaline cells. The Energizer came with lithiums, which should give even better results. I didn't want to waste expensive lithiums on a test.
Both tests ran until the N800 shut down (sort of). With the Energizer plugged into the N800 power jack, the N800 tried to shut down, but kept rebooting. I finally hit the power button to shut it down. The N800 also did not give "low battery" warnings with the Energizer plugged in.
Not a huge difference, but for a power pack that you can hold in your palm, an extra 2+ hours isn't bad. What really surprised me was that the N800 battery alone lasted so long while playing video. I normally use the N800 for ebooks and occasional surfing and get 6-7 hours with those activities.