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xiskillo is offline xiskillo
2016-09-08 , 03:19
Posts: 88 | Thanked: 77 times | Joined on Nov 2009 @ Spain
#31
Hi guys

My N900 dont save the time and date anymore after of remove the battery for few seconds adn suppose i need replace the bupbat capacitor coin.

Do you know any store on internet where i would buy it??

I could not find nothing on stock with the info give by @joerg_rw
 

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joerg_rw is offline joerg_rw
2016-09-08 , 04:09
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#32
http://www.mouser.de/Passive-Compone...yznegtZ1yzvmag

http://www.digikey.com/product-searc...=0&pageSize=25

http://www.elna.co.jp/en/capacitor/d...f/dsk414_e.pdf looks good
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Last edited by joerg_rw; 2016-09-08 at 04:20.
 

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L29Ah is offline L29Ah
2016-11-19 , 11:40
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#33
Originally Posted by joerg_rw View Post
Anyway BB_CFG register reset default is 0b00000000, for polyacene cap PAS414 (!!!) I suggest setting it to 0b00011111 as soon as possible during boot
For the record, it's `i2cset -f -y 1 0x4b 0x12 0x1f b`.
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ric9K is offline ric9K
2020-01-17 , 22:31
Posts: 330 | Thanked: 860 times | Joined on May 2011
#34
Looking for a replacement backup battery available today.

Seems to me that there is enough room around the battery to replace it by something slightly bigger.
Did some/one of you replace it recently?
With what?

Finally, after some years experience, li-ion battery or capacitor?
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Maemish is offline Maemish
2020-01-18 , 06:14
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#35
Hah, is there anothner battery? Loosing time and date while removing battery - I thought it as a device character. Are there some other problems if it's dead?
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ric9K is offline ric9K
2020-01-18 , 10:15
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#36
Yes, another battery. You can see it on the first page of the thread.

There aren't any other problems if it is dead. They all seem to die after one or two years.
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ric9K is offline ric9K
2020-01-20 , 22:02
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#37
I guess no answer means nobody knows but just to be sure, I bump this:

Do someone know with what we could, today, replace the backup battery?
Capacitor, li-ion? Bigger size?
thanks
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2020-01-21 , 06:19
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#38
Any battery that has the same voltage?
If you can fit it in there nicely (no stray contacts to other components), I don't see how this could break your machine.
 

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pichlo is offline pichlo
2020-01-21 , 08:54
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#39
Originally Posted by Maemish View Post
Hah, is there anothner battery? Loosing time and date while removing battery - I thought it as a device character. Are there some other problems if it's dead?
Yes, there is a small battery, about 3 mm across and 1 mm high, as a backup for the system timer while you are replacing the main battery (or the main battery is dead). It is supposedly rechargeable but it is never recharged (rumours are that an updated kernel enables the recharging but this did not happen in my experience), so it eventually dies after a few years.

The only negative effect is that, if you let your main battery discharge (or take it out), then the first thing the phone does the next time you switch it on is ask you to enter the current date and time.

Originally Posted by ric9K View Post
Do someone know with what we could, today, replace the backup battery?
Capacitor, li-ion? Bigger size?
I have been wondering about that too. Particularly the capacitor idea, but the lack of recharging put me off that. Another battery might help, as nonsuch says, but it seemed too much hassle to me to bother.
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ric9K is offline ric9K
2020-01-21 , 14:53
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#40
Originally Posted by pichlo View Post
Yes, there is a small battery, about 3 mm across and 1 mm high, as a backup for the system timer while you are replacing the main battery (or the main battery is dead). It is supposedly rechargeable but it is never recharged (rumours are that an updated kernel enables the recharging but this did not happen in my experience), so it eventually dies after a few years.

The only negative effect is that, if you let your main battery discharge (or take it out), then the first thing the phone does the next time you switch it on is ask you to enter the current date and time.



I have been wondering about that too. Particularly the capacitor idea, but the lack of recharging put me off that. Another battery might help, as nonsuch says, but it seemed too much hassle to me to bother.
Sure, lot for few. Especially if the battery is not recharged. I thought there was a way to enable the charging by sending some bits somewhere (sorry) with I2C-something. Gotta find and try that. (unless you are sure it doesn't work).
EDIT: oops, instruction in post 33, just above.

On the orher hand, I often remove the battery and am a bit bored to
Code:
ntpd -s
each time.
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Last edited by ric9K; 2020-01-21 at 20:16.
 

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