Question about NEC MobilePro 900 Handheld

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Coin cell backup battery

Is the coin cell backup battery rechargeable?

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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.

Posted on Sep 14, 2005


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Posted on Jan 02, 2017


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How do I replace the Bios battery in a Dell Precision 4600 Laptop. Which videos will show me the correct disassembly procedures? Can you supply the correct part no.?

Do you mean the Dell Precision M4600 mobile workstation. According to the User Manual, the coin cell battery is a 3V CR2032 lithium ion cell (page 117).

To replace this battery, turn off and close the laptop and remove the power cable and all external cables, docks and accessories. Make sure that the work surface is clean. Turn the system over and remove the main battery by sliding the release latch towards the center of the computer. Turn the system right side up and open the display. Press the power button to ground the laptop and drain any capacitors. Remove any cards from the card slots. Close the display again and turn the laptop upside down. Touch bare metal on the system to ground yourself relative to the computer.

Remove the two screws that hold the base cover onto the 4600. These are on the edge of the battery compartment on the side nearest the battery release latch. Press the rubber feet on the bottom of the cover towards the rear of the system to disengage the bottom door. Then remove the base cover. (See page 23 of the manual.)

Carefully disconnect the coin cell battery from the system board. There is a small white connector at the end of the wire. (The coin cell compartment is near one of the two system fans.) Pry up the current coin cell battery out of the adhesive and remove it from the computer. The connect the new battery to the coin cell compartment and reconnect the wires to the system board. See pages 49-50 in the manual. Replace the base cover and the battery.

I can't find a video for the coin cell battery replacement. However, the manual is available here: . However, the first part of the following video: . shows disconnecting the coin cell battery from the system board (when the system is completely out of the case.

I hope this helps.

Cindy Wells

Aug 10, 2017 | Dell Computers & Internet

1 Answer

How do I charge my fitbit zip battery?

You cannot charge the Fitbit Zip as it uses a coin battery.
The Fitbit Zip runs on a replaceable 3V coin battery, CR2025.
It can be found wherever batteries are sold.
You can change the battery while not wearing hence counting steps. Fitbit Zip Battery Change

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If the clock won't keep time or the date is wrong, replace the depleted coin cell battery.

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My 2007 BMW 650i remote key works sometimes. How do I re-charge my key remote?

Most remotes have a 3V li-ion coin cell that provides the power and last about 5 years. You will have to take the remote apart and replace the coin battery as there is no way to recharge. The battery cost about 4-5 bucks at the drug store.

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I changed the battery on my D630 and lost the date & time. I assume the cmos battery is bad. Where is it located on a D630 and what is the battery #?

CMOS Coin-cell is located under the keyboard. You have to remove the hinges cover and keyboard to access the coin -cell

Please study the following two links giving clear instructions about changing the coin-cell battery of Dell D630.

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Replacing memory battery garmin gps 75

The battery inside is a panasonic 3v Panasonic
Battery, Lithium, 3v, 190ma, Coin
884-0301 BR2032
You need a clip too
Keystone Electronics
Battery Holder, Coin-Cell; 20
mm; 0.896 in.; Glass Filled
Nylon; 1; 1 AWG

Remove battery pack. Open unit by the six small screws in the back. The coin battery is in the bottom right (mine had a blue cover) The original ones are soldered/pressed in. Replace with the holder and rewire. Cheers

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You can go to batteries plus or wherever and buy a new 3 volt battery for it. You will have to unsoder the old one and soder the new one back in. Original was a VL1220, I replaced with a Dantona Lith 1-2VLS

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Lost system password

Only way to remove a BIOS password on any computer is to remove all power sources from the motherboard so its memory can be cleared.

First, remove the main battery from the laptop. Then you must locate and find the little coin cell battery (It looks like a watch battery) on the laptop and remove it for about a minute or so. Then you can replace them in the opposite order.

Your coin cell battery is in a bay on the bottom of your computer. Enjoy!
1. Before removing the coin battery:
2. Locate the memory module cover on the bottom of the system.
exmem01.jpg 3. Use a Phillips screwdriver to remove the two screws securing the cover.
4. Lift and remove the cover from the system.
5. Locate the coin battery.
6. Use a fingernail (or small flathead screwdriver, if necessary) to release the battery ZIF connector.
exmem08.jpg 7. Remove the battery from the chassis.

8. Reverse the previous steps to replace the coin battery.

May 06, 2008 | Dell Latitude C400 Notebook

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Battery is fully charged but camera will not power up

Check you manual .. is there a 'back up' battery (coin cell ??) .. if not then the battery is dead (rechargeable batteries do not last for ever) .. try a brand new battery

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