"Backup Battery Very Low"

I just bought a 900C on eBay and had the same problem. According to the seller "the video cable on the right under the hinge cover gets loose..if its reseated it will be fine..you could just press on the bottom of the hinge cover right and it will make it go away but best to reseat the cable." I haven't tried his solution yet. Mine seems to intermittent since it is working fine right now.

NEC Computers has developed this update file to address several service issues with MobilePro 770 and 800 handheld personal computers. To assure proper operation, NEC Computers strongly recommends that you update your MobilePro 770 and 800 systems immediately by installing this file according to the installation instructions. * Download MP77_Update.CAB for MobilePro 770 and 800:ftp://ftp.neccomp.com/pub/Catalog/4058/MP77_Update.asp * View Installation Instructions: http://support.necsam.com/mobilesolutions/FAQs/display/default.htm?itemID=2001313#Installation * See Contents of MP77_Update.CAB: http://support.necsam.com/mobilesolutions/FAQs/display/default.htm?itemID=2001313#Contents * Read Additional Frequently Asked Questions: http://support.necsam.com/mobilesolutions/FAQs/display/default.htm?itemID=2001313#FAQ Installation Instructions for MP77_UPDATE.CAB for MobilePro 770 and 800 First, download MP77_UPDATE.CAB to either your HOST or MobilePro system. It must be manually loaded onto your MobilePro by either using a dial up connection, PCMCIA Flash card, or from a connected PC before continuing with the installation. To install the MP77_UPDATE.CAB file, follow these steps: Note: An out of memory error message will be displayed if you attempt to install this file twice. 1. Back up your MobilePro data and configuration using the Microsoft ActiveSync backup procedure. For details on using ActiveSync, see your MobilePro User's Guide. 2. Perform a Soft reset on your MobilePro. Note: Performing a Soft reset does not erase your data. It simply cleans up the memory and refreshes the system registry. 3. Copy the MP77_UPDATE.CAB file to you MobilePro desktop. 4. Install the file by double tapping the MP77_UPDATE ICON with your stylus. For proper installation, you MUST accept the default location - \Program Files, by clicking OK. 5. Perform a Soft reset on your MobilePro. 6. Once the update file is installed, NECC recommends that you use the ActiveSync backup procedure to again back-up your system. This time your backup will include the update file so you can restore both your data and the update file should either ever be erased. Contents of MP77_UPDATE.CAB for MobilePro 770 and 800 This file installs updates to the following built-in MobilePro drivers: * StartUI: This driver eliminates a memory leak that reduces user resources. * Bitmap files: Replaces an incorrectly sized bitmap file that can cause the unit to lock up if either "the power on password" or "Display Owner Notes features" are enabled for use. NOTE: NEC Computers strongly recommends that you update your MobilePro 770 and 800 systems immediately by installing MP77_UPDATE.CAB according to the following instructions. NOTE: During Installation of this file, you must accept the default installation directory or the updates will not be effective! For assistance or further

NEC Computers has developed this update file to address several service issues with MobilePro 770 and 800 handheld personal computers. To assure proper operation, NEC Computers strongly recommends that you update your MobilePro 770 and 800 systems immediately by installing this file according to the installation instructions. * Download MP77_Update.CAB for MobilePro 770 and 800: ftp://ftp.neccomp.com/pub/Catalog/4058/MP77_Update.asp * View Installation Instructions: http://support.necsam.com/mobilesolutions/FAQs/display/default.htm?itemID=2001313#Installation * See Contents of MP77_Update.CAB: http://support.necsam.com/mobilesolutions/FAQs/display/default.htm?itemID=2001313#Contents * Read Additional Frequently Asked Questions: http://support.necsam.com/mobilesolutions/FAQs/display/default.htm?itemID=2001313#FAQ Installation Instructions for MP77_UPDATE.CAB for MobilePro 770 and 800 First, download MP77_UPDATE.CAB to either your HOST or MobilePro system. It must be manually loaded onto your MobilePro by either using a dial up connection, PCMCIA Flash card, or from a connected PC before continuing with the installation. To install the MP77_UPDATE.CAB file, follow these steps: Note: An out of memory error message will be displayed if you attempt to install this file twice. 1. Back up your MobilePro data and configuration using the Microsoft ActiveSync backup procedure. For details on using ActiveSync, see your MobilePro User's Guide. 2. Perform a Soft reset on your MobilePro. Note: Performing a Soft reset does not erase your data. It simply cleans up the memory and refreshes the system registry. 3. Copy the MP77_UPDATE.CAB file to you MobilePro desktop. 4. Install the file by double tapping the MP77_UPDATE ICON with your stylus. For proper installation, you MUST accept the default location - \Program Files, by clicking OK. 5. Perform a Soft reset on your MobilePro. 6. Once the update file is installed, NECC recommends that you use the ActiveSync backup procedure to again back-up your system. This time your backup will include the update file so you can restore both your data and the update file should either ever be erased. Contents of MP77_UPDATE.CAB for MobilePro 770 and 800 This file installs updates to the following built-in MobilePro drivers: * StartUI: This driver eliminates a memory leak that reduces user resources. * Bitmap files: Replaces an incorrectly sized bitmap file that can cause the unit to lock up if either "the power on password" or "Display Owner Notes features" are enabled for use. NOTE: NEC Computers strongly recommends that you update your MobilePro 770 and 800 systems immediately by installing MP77_UPDATE.CAB according to the following instructions. NOTE: During Installation of this file, you must accept the default installation directory or the updates will not be effective! For assistance or further

NEC Computers has developed a service pack to address several service issues with MobilePro 780 and 880 handheld personal computers. To assure proper operation, NEC Computers strongly recommends that you update your MobilePro 780 and 880 systems immediately by installing this service pack according to the installation instructions. * Download Service Pack One for MobilePro 780 and 880: ftp://ftp.necsam.com/pub/Catalog/3959/MobileProSP1.asp * View Installation Instructions: http://support.necsam.com/mobilesolutions/FAQs/display/default.htm?itemID=2001186#Installation * See Contents of Service Pack: http://support.necsam.com/mobilesolutions/FAQs/display/default.htm?itemID=2001186#Contents * Read Additional Frequently Asked Questions: http://support.necsam.com/mobilesolutions/FAQs/display/default.htm?itemID=2001186#FAQ Installation Instructions for Service Pack One for MobilePro 780 and 880 First download the service pack (MP78_UPDATE.CAB) to either your HOST or MobilePro system. It must be manually loaded onto your MobilePro by either using a dial up connection, PCMCIA Flash card, or from a connected PC before continuing with the installation. To install the MP78_UPDATE.CAB file, follow these steps: 1. Back up your MobilePro data and configuration using the Microsoft ActiveSync backup procedure. For details on using ActiveSync, see your MobilePro User's Guide. 2. Perform a Full (hard) reset on your MobilePro. Caution: Performing a Full reset erases all your data. Your MobilePro resets to the factory default settings. Please perform the backup first or you will lose data! 3. Copy the MP78_UPDATE.CAB file to you MobilePro desktop. 4. Install the service pack by double tapping the MP78_UPDATE ICON with your stylus. For proper installation, you MUST accept the default location - \Program Files, by clicking OK. 5. The following Message box will be displayed: Warning !!! 1. In order to ensure these patches are properly installed you must perform a Hard Reset prior to the installation. 2. You must back up all application and data files before performing a Hard Reset. The Hard Reset WILL ERASE all applications and data stored on this Mobile Device. 3. This file must be installed immediately after performing a Hard Reset on the Mobile Device (before any applications are reinstalled). 4. Press CANCEL to exit. Or Press CONTINUE to install this file. 6. Press Continue to install the service pack or Cancel to back up your data. 7. When the Setup Finish message box is displayed, Click Ok. This will remove all temporary files from your systems. 8. When the Setup Complete message box is displayed, click Ok. 9. Perform a Soft reset on your MobilePro. 10. Optionally, restore your MobilePro data using the ActiveSync restore procedure. 11. Once the service pack is installed, NECC recommends that you use the ActiveSync b

NEC Computers has developed a service pack to address several service issues with MobilePro 780 and 880 handheld personal computers. To assure proper operation, NEC Computers strongly recommends that you update your MobilePro 780 and 880 systems immediately by installing this service pack according to the installation instructions. * Download Service Pack One for MobilePro 780 and 880: ftp://ftp.necsam.com/pub/Catalog/3959/MobileProSP1.asp * View Installation Instructions: http://support.necsam.com/mobilesolutions/FAQs/display/default.htm?itemID=2001186#Installation * See Contents of Service Pack: http://support.necsam.com/mobilesolutions/FAQs/display/default.htm?itemID=2001186#Contents * Read Additional Frequently Asked Questions: http://support.necsam.com/mobilesolutions/FAQs/display/default.htm?itemID=2001186#FAQ Installation Instructions for Service Pack One for MobilePro 780 and 880 First download the service pack (MP78_UPDATE.CAB) to either your HOST or MobilePro system. It must be manually loaded onto your MobilePro by either using a dial up connection, PCMCIA Flash card, or from a connected PC before continuing with the installation. To install the MP78_UPDATE.CAB file, follow these steps: 1. Back up your MobilePro data and configuration using the Microsoft ActiveSync backup procedure. For details on using ActiveSync, see your MobilePro User's Guide. 2. Perform a Full (hard) reset on your MobilePro. Caution: Performing a Full reset erases all your data. Your MobilePro resets to the factory default settings. Please perform the backup first or you will lose data! 3. Copy the MP78_UPDATE.CAB file to you MobilePro desktop. 4. Install the service pack by double tapping the MP78_UPDATE ICON with your stylus. For proper installation, you MUST accept the default location - \Program Files, by clicking OK. 5. The following Message box will be displayed: Warning !!! 1. In order to ensure these patches are properly installed you must perform a Hard Reset prior to the installation. 2. You must back up all application and data files before performing a Hard Reset. The Hard Reset WILL ERASE all applications and data stored on this Mobile Device. 3. This file must be installed immediately after performing a Hard Reset on the Mobile Device (before any applications are reinstalled). 4. Press CANCEL to exit. Or Press CONTINUE to install this file. 6. Press Continue to install the service pack or Cancel to back up your data. 7. When the Setup Finish message box is displayed, Click Ok. This will remove all temporary files from your systems. 8. When the Setup Complete message box is displayed, click Ok. 9. Perform a Soft reset on your MobilePro. 10. Optionally, restore your MobilePro data using the ActiveSync restore procedure. 11. Once the service pack is installed, NECC recommends that you use the ActiveSync b

The MobilePro 900 back up battery is low and should be replaced. The battery is a CR2032 coin-cell battery, which is very common and can be purchased at most department and drug stores. Refer to section 1-7 of the "MobilePro 900 Handheld PC's User's Guide" for detailed replacement instructions.

After setting up the MobilePro 900 for the first time (or after a hard reset), a soft reset is required to correctly save the dial-up networking passwords for remote networking. If your MobilePro 900 is already configured with a RAS connection that will not authenticate, you can do the following to fix the issue: * 1. Use the stylus to depress the reset button located on the bottom of your MobilePro 900 and allow it to reboot. * 2. Tap Start a Programs a Communications a Remote Networking. * 3. Open the dial-up connection by double-tapping the icon, just as if you were going to connect. Ensure the user name is correct and re-type your password making sure there the “Save password” option is checked. * 4. Tap the “Connect” button to save your password. If you do not tap the connect button, the password will not be saved correctly.

The back up battery should be replaced immediately upon seeing the message "Backup Battery Very Low - Your back up battery is very low or missing. Data loss may result from failure to replace the battery very soon. Consult the manufacturer's instructions for directions on replacing or charging the backup battery." Warning: It is important to note that the back up battery in the MobilePro 900 is not rechargeable, thus, to prevent data loss, it is important to change the back up battery immediately when this message is displayed.

Note: It may be necessary to depress the power button more than once to properly initialize the power management circuitry before the unit comes on. Note: It may be necessary to connect AC power to the unit and allow it to charge before attempting to apply power. The unit will not power up if the battery voltage is below a safe operating level. Please refer to the leaflet "NEC MobilePro 900, Performing a Hard Reset" that was shipped with the unit for the procedure to perform a hard reset on your MobilePro 900.

No the coin cell backup battery is not rechargeable. If the MobilePro 900 back up battery is low it should be replaced. The battery is a CR2032 coin-cell battery, which is very common and can be purchased at most department and drug stores. Refer to section 1-7 of the “MobilePro 900 Handheld PC’s User’s Guide” for detailed replacement instructions.