Where is the vanadium lithium battery installed in my Sony DSR250? It doesn't appear to be holding a charge. It keeps showing "clock set", despite several attempts to charge it.

I don't have a DCR PC 100e, but be aware the main battery in the camera also can be dead. If so, the voltage needed to charge the internal battery, can't be reached. Normally the main battery, should be capable of recharging the Vanadium-lithium battery, without the charger connected.
Just sit out the 24 hours, but be prepared to replace perhaps both batteries. The main and the internal. Not sure you can replace the internal battery yourself.

you dont replace the battery,you charge the whole unit,pg 13 of your manual, http://service.us.panasonic.com/OPERMANPDF/PV-DV52.PDF

The RTC battery is a rechargeable Li-ion "clock" battery that's buried underneath the keyboard - it keeps date and time going when your computer is turned off. If you're getting this message, you should go follow the screen prompt, hit F1 to enter Setup, and set the date and time, leave the computer on for several hours to charge it (the clock battery recharges only with the computer turned on) and it should go away.

In the rare event that your RTC battery is bad, it's really up to you as to getting it replaced or not - it's a lotta work, and not all the battery vendors out there is competent enough to sell you the right kind of battery (installing a non-rechargeable Lithium battery will kill the thing outright, and there are actually people selling these....). Not having a working RTC battery doesn't really interfere with the workings of the computer - you'll just have to set date and time every time you start it, and you can do so manually or by downloading some freeware such as Atomic Clock Sync to automatically do it for you.

Hi babu50,

Well the battery in your camera is a (vanadium-lithium rechargable battery, and from what I am aware is and should be recharge only.

I understand from a friend who had one of your camera type that it is not replacable because it is built-in, even Technician people with all the gear wont normaly replace that.

If your camera is not keeping it's setting eg. time, date etc (which that battery helps keep) then the chances are it has either come lose of it's fixings, or packed up working, though the first option is more like to have happened.

I think you should charge your camera in mains for a min of 24 hrs, even if it tells you it's full.
I had to do that with my camera 8 years ago.

Hope this helps.

Thank you for using Fixya.

First thing to check is are they actually being charged ALL the time you have them on charge. A couple of Ones which I've repaired myself had problems with the soldered joints for the connector on the printed circuit board. When the plug was wiggled about it made an intermittent connection and wasn't charging all the time.
Connect your charger and try wiggling the plug gently.
also your contacts may require cleaning this can be ddone by spraying "Switch Cleaning Lubricant" onto the contacts on the base of the unit.

Definitely make sure its actually charging, usually this can be done through the menus to see satellites and the battery life indicator. It will show if its charging or not...Electronic cleaner or even rubbing alcohol on a q-tip can work on the terminals. Making sure the charger is unplugged and the device battery is drained before cleaning should be a priority...

How old is the device. Despite what Garmin and Tomtom tell you Lithium Ion while being a good technology has its limitations, and the main limitation is its overall life span in combination with how fast it goes from what seems to be a good battery to something that barely holds a charge for a few minutes...

Its a standard lithium ion battery inside. It can be replaced relatively inexpensively. However getting too it can be tricky and I'd suggest reading up on battery replacement before attempting. Also for future reference keeping a lithium ion battery fully charged all the time will keep it lasting longer unlike older batteries that would develop a "memory" and benefit from being drained completely from time to time... the trouble finding location could possibly be attributed to the amount of power it gets from the batteries.

Hi!
The internal battery is bad. It has to be replaced. Contact your local Sony service center, but if they ask too much, you can contact me at [email protected] and I will give you a good price.
I work in Sony service center.

Tom

hi there...i have the same problem..did u find any solution for the very same..
get back to me on
[email protected]

Hi,
Below picture is exploded view how to change back-up Lithium battery in Sony GV-D900 player.
Hope it will help you out.

RESETTING THE CLOCK AFTER A TOTAL MEMORY LOSS

If you do not change the built in lithium battery within a reasonable period of time after you see the ‘flashing’ LOW BATT. warning indicator, the lithium battery may become exhausted and will no longer be able to supply back up power to the SmartSet internal computer.

If the unit is disconnected from the AC outlet after the battery is exhausted, or if a power interruption occurs, the SmartSet memory will be lost and the clock will need to be reset when the power is restored. Be sure to install a fresh lithium battery before you reset the clock, otherwise the clock will need to be reset each time the power is interrupted.

If the lithium battery is exhausted and you experience an interruption in the AC power supply, the clock will reset itself to its initial default setting when the power is restored.

The initial default setting is “12:00 AM, Saturday, January 1
(1 1), 2005”.

If you notice that the time on your SmartSet clock radio is completely incorrect, and the day indicator is also wrong, press the MONTH/DATE button to see the date. If the date display is showing “1 1” (January 1 ), you probably experienced
a total memory loss. To reset the clock after a total memory loss, proceed as follows:

1.) Install a new CR2430 lithium battery in the battery compartment.

2.) Connect the radio to your AC outlet and let the clock set itself.

3.) Depress the MONTH/DATE and TIME buttons together. The display will change from ‘time’ to ‘year’. While holding the MONTH/DATE and TIME buttons, press the UP button to
set the display to the correct year, then release the buttons.

4.) Depress the MONTH/DATE button. The display will change from ‘time’ to 'month/date’ (mm/dd). While holding the MONTH/DATE button, press the UP button to set the display
to the correct month and date. The Day indicator will change automatically as you adjust the month/date settings. When the correct month and date appear on the display, release the buttons.

5.) Depress the TIME button and the UP button to set the display to the correct time. Be sure to confirm that you have set the time correctly to ‘AM’ or ‘PM’ by observing the AM indicator.

6.) After you set the time, reconfirm that the Day, and Month/Date displays are still correct. Make final adjustments if necessary.

The SmartSet clock memory is now reset and the new lithium battery will maintain it for the next 5 to 8 years, depending on the number and duration of the power outages you experience.

IMPORTANT NOTE:
After resetting the clock, don’t forget to reset your wake up times, and alarm mode settings, and sleep timer settings as well.