Tecra M5 RTC Battery

I suspect my RTC Battery is dead. I use my laptop on AC most of the time. Recently, when it goes into hibernation it loses time...
Is this a consumer replacable item? Directions available?
Part # for Toshiba M5-S4332
Model: PTM51U-12001P

Hi guys
Generally this problem appears only if the CMOS battery (real time clock) is empty or corrupt.
The real time clock battery provides power for the internal real time clock and calendar. It also maintains the system configuration. If the RTC battery becomes completely discharged, the system loses this data and the real time clock. In such case the message RTC battery is low or CMOS checksum is inconsistent appears.
So I see only two options:
Either you will charge the real time clock battery or you will ask the technician for the replacement.
Usually the battery should be fully charged after 8-9 hoers but try to connect the notebook to the AC adaptor for a longer period.
If it will not help to solve the problem so you have to contact the ASP for the RTC battery replacement.

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CMOS / RTC Battery for Satellite A100-326?

Hi,
I'm after a replacement CMOS/RTC battery for my A100-326
I've got my machine open and located the battery but it has no model number on it.
I have contacted a Toshiba assistance center and they replied that the battery is part of the board and the whole board has to be replaced. However, if I can find the reference for the battery, I have a friend in a computer store that will replace it with a new one.
Any help would be great. Thanks!
Regards
Srgio

Hi
Why you want to replace this
Such battery is reachable
To charge the RTC battery you have to connect the AC adaptor to the notebook.
The main battery should be inserted too and the notebook should run for 20.24 hours.
Anyway, as far as I know its a Lithium Ion RTC battery 3V and 14mAh

Cmos (rtc) battery replacement for hp G62-b25sa

Hello!
Could anybody help me to replace CMOS (RTC) battery for my laptop HP G62-b25sa pls? And How can I find the correct CMOS battery for this model HP G62-b25sa ?

Hi,
The following manuals will shows you correct part # and how to replace it:
http://h10032.www1.hp.com/ctg/Manual/c02641795.pdf
http://h10032.www1.hp.com/ctg/Manual/c02542455.pdf
Regards.
BH
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Satellite A65-S126: Cannot find the RTC battery

I have my machine turn down but cannot find the batteries to replace them. Based on Toshiba support the P/N are P000444350 but there is no such item in the case that I can see. Any ideas..?
Even the disassembly manuals online do not show them.
I know there must be something in here.
Also according to the operation manual these batteries take power from the main battery.
Since my main battery is completely dead, would this account for the time snyc issue I'm having with the RTC batteries; since they are not getting power to recharge??

Sorry for my misunderstanding but what battery do you mean exactly.
Do you mean the main battery or the tiny RTC battery which is fixed on the motherboard?!
> Also according to the operation manual these batteries take power from the main battery.
This is not exactly right.
The RTC battery provides power to the motherboard therewith the internal clock and the BIOS can run 24/7.
It does no matter if the main battery is empty. The RTC should provide the power to motherboard for several times also if the main battery is empty.
If the RTC battery is empty the motherboard cannot be provided with power and the internal clock, BIOS will be reset.
In such case you have to connect the main battery and the AC adaptor to the notebook and let the battery charge for about 12 hours.
For details please check the user manual -> battery chapter
best regards

Laptop do not boot after remove RTC battery !!!

After remove RTC battery for clear the power-on password.
my laptop is power on and fan is working but dont boot. just black screen.
helpppppppp

Polarity is really not an issue since there is a connector from the batery to the systemboard. It is either plugged in or not since there is a keyway at the header on the systemboard.
The following is an image of how the connection looks. ref: the service and maintenence guide
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Portege M100 - How to replace the RTC battery?

Hello, the RTC battery of my Portege M100 is flat. I manage to order one from the internet but I can't locate it. I dismantle almost every part of the computer, but if someone could just guide me and give the procedure du replace it, it would be great. Thanks in advance!!

Hi friend,
its easy to replace the RTC battery on your machine. I did it already and I had no problems during the replacement, I mean it was a little bit tricky to find the batt. but I will give everything from my experience. ;)
Look first at the wireless lan card, theres a slot an under the slot is the minipci-wlan-card located. Near the wireless lan card slot is some little cover, this cover must be removed (gently). The RTC battery is located in some white insulator, but before peeling that little battery out, you must disconnect the battery from the mainboard. After disconnecting it, just lift the RTC up and place the new one there.
Thats all, unfortunately I cannot serve you with some pics, so you will have to imagine it by yourself. ;)
Good luck and greets
P.s.: If you feel uncomfortable in replacing the batt, then ask some techie to help you.

HP Pavilion dv3550el, how to replace RTC battery ?

HP Pavilion dv3550el
Where is RTC battery on my laptop ? how can i replace it ?
Thanks, Paolo.
This question was solved.
View Solution.

Hi Paolotia,
Replacing the RTC battery in your notebook does involve rather extensive disassembly. You will have to disassemble it down to the system board.
See page 77 of the Maintenence & Service guide for your notebook series.
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2015 Microsoft MVP - Windows Experience Consumer

Replacing RTC battery on DV3-2350EL

Hi,
is it possible to replace the RTC battery on HP Pavilion DV3-2350el without make warranty void?
How can I get the replacement battery? Can I use a standard CR2032 or does the battery come embedded with envelope and cables?

Hi,
The replacement procedure is detailed starting on Page 84 of your Maintenance & Service Guide.
I don't believe this will effect your warranty, but you can always check with HP using the relevant link below.
If you live in the US, contact HP Here.
If you are in another part of the world, start Here.
Regards,
DP-K
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Cmos (rtc) battery replacement for hp G62-b25sa

Hello!
Could anybody help me to replace CMOS (RTC) battery for my laptop HP G62-b25sa? And How can I find the correct CMOS battery for this model HP G62-b25sa ?

Hi
Please find the link given below check page number 51 how to replace the CMOS battery on your unit. Part number RTC battery 606015-001.
Link
Let us know how it goes!
"I work for HP."
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Regards
Manjunath

Equium L10: Issue with main battery and RTC battery

Hi
I have the Toshiba Equium L10 and it is around 14 months old and I am having problems with the battery pack and how long it lasts after a full charge. I am also having problems with the RTC battery and an ERROR 0271: Check date and time settings message when I turn on the notebook.
With regard to the battery pack, I can fully charge it up in around 3 hours but when I start to use it, it only seems to last around one and a half hours or so and it then needs to be charged again. I may have it on for around 40 minutes or so and then turn it off and come back to it later or in a day(s) or so. How long should I expect from a fully charged battery?
Regarding the RTC batttery, this is really becoming a pain and I have only started getting the ERROR 0271 message at boot time, over the last few weeks or so. I can fully charge the battery pack up and then leave it for a couple of days, but when I turn it on, I get the ERROR 0271 message about the date and time settings being incorrect. Surely after a full charge, the RTC battery should last longer than a couple of days?
The user manual states that if the RTC battery is exhausted or getting low, you should charge the RTC battery for 24 hours, but in another part of the manual it states between 24 and 48 hours, but how can you charge it for that long when the sections regarding the charging of the battery pack state that after charging the battery pack you should disconnect the AC adaptor because leaving it connected will shorten the life of the battery pack. So how can we charge the RTC battery for 24 to 48 hours if we are not supposed to leave the AC adaptor connected after the battery pack is charged - which is around three hours. Any suggestions regarding these problems, would be appreciated.
By the way we all know it's easy to change the RTC/CMOS battery in your desktop base unit, but how easy is it to change it in a Toshiba L10 Equium?
Regards
Brave0

Hi Brave0,
The normal recommendation for the CMOS (RTC) battery is to leave the notebook connected to the AC adapter for at leat 12 hours once the main battery is fully charged. The charging circuitry will divert the charge current to the RTC battery automatically and no current will be passed to your main battery.
The recommendation for not leaving the AC adapter plugged in when the main battery is fully charged is really only applicable to older notebooks which did not use Li-Ion batteries and consequently they had to be fully discharged before recharging so as to avoid any 'memory' effects in the battery.
With modern Li-Ion batteries it is quite safe to leave the battery in place when fully charged and still power the notebook from the AC adapter. The charging circuitry will not pass any charge to the battery if it is fully charged.
regards,

RTC battery & Sat Pro 6100

Sorry for my bad english.
If the battery cmos of a notebook (I have a sat Pro 6100) is damaged completely, the portable one is ignited equally?

Hi Biagio,
The RTC (or CMOS) battery is installed on the mother-board and is used to maintain the BIOS settings when the notebook is powered off. If the RTC battery is faulty then the date/time and other BIOS settings will not be maintained when the notebook is powered off for any length of time.
The normal notebook battery will be unaffected by the failure of the RTC battery and will still recgarge as normal when the notebook is connected to a mains power supply.
The RTC battery can be charged by connecting the mains power supply but leaving the notebook powered off for about 24 hours. If the date/time is still being lost after this then the RTC battery will need to be replaced by an authorised Toshiba Service Agent.
HTH
Message was edited by: NickyNoogle

RTC Battery Replacement - C55-B5200 Laptop

Where ias the RTC battery located on a Satellite C55-B5200 laptop. Need to be replaced.

I am having the same problem, and took the bottom off, but could find no battery. Did you ever get a response on locating it? Toshiba no help at all, and I do not think I could ever reccomend them to any one.

Rtc battery in dv3505

The rtc battery in the DV3505 has wires attached with a small connector on the end. Anyone know 1) if it's possible to replace just the battery and re-use the connector and 2) what sort of battery is it (they are usually 2032)? I'm hoping just to have to take the laptop apart once to fit a new battery, rather than one time to find out what the battery is and then again to fit the replacement.

Yes you can & we do this all the time as cheaper than buying purpose cabled batteries & we can buy better quality cells & they are very new & not very old stock which is case when buying complete in many cases.
just remove the insulation carefully then pull the cable from its spot weld points noting polarity then remount to new cell. You can solder it if you have a nice hot iron & do it really quickly applying little heat to the cell.
Check cable connector for voltage reading before wrapping assembly.
Use some shrink wrap for first insulation wrap of cell & cable & hot air gun to shape it nicely to cell & taper down to cable.
Use some electical tape for a second wrap & make sure back end is sealed with tape then do a nice neat wrap around the assembly & all should be good.
just make sure you buy a quility 3V lithium cell (2032) & not china rubbish. Also use a good quality amalgamating insulation tape.
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RTC battery problem A215-S7437

Hi all,
I have been having problems with my Satellite A215-S7437 laptop getting a "CMOS checksum bad" error upon startup for the past couple of months. This error usually occurs the first time I start the computer up in the morning. I press F1 to load defaults and windows starts as normal. No bigs. I tried to charge the RTC battery by leaving the computer plugged in (charging) and on for 24 hours. This didn't seem to help. I also recently updated the BIOS to the latest version. This hasn't helped either.
In addition, sometimes, especially when I haven't turned the computer on for a while, it will fail to boot. No splash screen, just lights and normal HD powering up sound but nothing else. I power-cycle the machine about 10 times and eventually it will start, give me two system beeps and the checksum bad error. I hit F1 to load defaults and Windows starts normally. Today I got a new error "ERROR 0250: System battery is dead - replace and run SETUP. ERROR 02B0: Diskette drive A error. Press F1 to load defaults, F2 to setup." The machine did not respond when I pressed F1 or F2, so I power-cycled it and got my familiar CMOS checksum bad error and it started as usual.
All this to say that I am convinced that my RTC battery is well and truly the cause of my problems and should be replaced. Now, the question is whether or not it can be done without sending my ~3-year-old laptop to a ASP 3 hours away and paying an arm and a leg. I do have a kind friend who I am confident can perform laptop surgery to replace the RTC battery without killing it.
Does anyone know what kind of RTC battery this model takes? Is it soldered to the motherboard? How much would it cost to have the ASP take care of it?
Thanks for all your help.
Regards,
T

Hello
Googling around I found info that for Satellite A210 (similar to your US A215) you can use follow RTC batteries:
RTC battery (Maxell ML1220T10) Lithium-Ion 3.0V 14 mAH
RTC battery (Maxell ML1220HT10) Lithium-Ion 3.0V 18 mAH
RTC battery (Sanyo ML1220T28) Lithium-Ion 3.0V 15 mAH
RTC battery (Panasonic ML1220/B) Lithium-Ion 3.0V 17 mA
Replacement procedure is pretty complicated and the whole notebook must be disassembled. If you are not familiar with this stuff you should not do this to avoid some hardware damage.
I dont know how much you must pay for replacement by ASP. Call and ask them.
Bye

Tecra 520 CDT battery charging

Now I have two TECRA 520 CDT machines which will not charge their battery.
The batteries are in good condition (one new) and can be charged on another 520 CDT machine using the same charger, after which the "dead" machine will run and the charger maintain the battery.
Can this problem be repaired, and if so by whom?

Hi
> Can this problem be repaired, and if so by whom
If you are 100% sure that this issue is not related to the faulty battery then this must be an notebook problem.
Who knows why the battery cannot charge maybe there is something wrong with the motherboard or only some battery pins are not connected properly.
Does the battery LED lights up when you insert the battery into the machine and disconnect the AC adaptor?
If not then this would mean that the battery is not recognized and this would mean that there is something wrong with the notebook
In such case the machine should be checked by a notebook technician
The Toshiba ASP (authorized service partner) should be contacted

Tecra M5 RTC Battery

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