My Sansa Clip MP3 Player is almost new, however the battery only last about 3-4 hours from fully charged. But now it appears to be completly dead which my computer will not even recognize it to start the charging process for me to charge it again....help...

Question edited for a lot more clarity.
Question moved from Misc to model category.

Replace the internal Li-Po battery, but try a reset first.

https://www.google.com/search?q=sandisk+sansa+c240+battery+replacement


If your Sansa player is freezing, not charging or not turning on, the first thing to try is a reset of the unit. This will normally clear any temporary condition that may cause the player to freeze or not shut off completely, it's a bit like when your PC crashes and you need to re-start it to clear the error.
Dec 28, 2020

My Sansa MP3 player has stopped working or charging

Sansa Clip Won't Charge - iFixit

iFixit https://www.ifixit.com > Answers > View > Sansa+Clip...

Feb 15, 2021 - I found an older Sansa Clip which will power on when connected to a USB charger or to the computer, but it won't boot up or hold a charge.
1 answer · 1 vote: Hi, Sounds as though the battery has failed and needs to be replaced. I couldn't find a battery replacement guide for a Sansa Clip but here's a video ...
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Sansa Clip Battery is not charging - SanDisk Forums

sandisk.com https://forums.sandisk.com > sansa-clip-battery-is-not-...
Jun 4, 2008 - You can try to charge the device first, to make troubleshooting easier. Unplug the device, then select Settings, then USB Mode, then MSC. Now ...
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Again as above your battery may need replacing see if its still under warrenty

Make sure the player is fully charged. 1. Connect the player to the PC. 2. Make sure the computer detects the player.
NOTE: If needed, switch the player to MSC mode, 1. Turn device OFF. 2. Slide the Hold switch down to Lock (orange color showing). 3. Press and hold the center button while connecting the device to the PC.then connect it to the PC. Next Be sure the battery is charged 1. Leave the player connected for approximately 2 hours to charge. 2. Disconnect the player from the PC. 3. Verify if you can turn on the player. 4. Reset the player if necessary. To reset the player: 1. Press and hold the Power/Menu button for approximately 20 seconds. 2. Release the Power/Menu button. 3. Press the Power/Menu button again to turn on the player.
If that does not do it, re-seat the battery: Here is how to get to the battery, 1. Press the battery compartment in while sliding to the right. 2. Remove old battery. 3. Insert new battery or reset the old battery. 4. Close the battery compartment. Then try and see if it will come on with out the battery hooked to your computer. 1. Remove the battery. 2. Connect the player to the PC to verify if it turns on. 3. Re-seat the battery to ensure proper connection. 4. Verify if the player turns on.

1. 
   
   Remove the cap over the USB plug and insert the unit into the USB port of a desktop or laptop computer. The computer will recognize the Sansa Express as a new hard disk drive.
   
2. 
   
   Locate the battery icon on the upper right of the screen. The battery icon will fill in with color as the unit charges. When the icon is filled in, the charge is complete. The unit will fully charge in about 3 hours as long as the desktop computer or laptop is powered on.
   
3. 
   Plug the unit into the USB port of a car or AC adapter and then plug the adapter into an AC outlet or an auto cigarette lighter socket, as the case may be. The Sansa Express will charge in about 3 hours.
   

if it says that it's charged fully after you charge it then it sounds klike the battery may be almost dead, contact sandisk on their website to see if these are replacable because many are not. www.sandisk.com

This is direct from the sansa FAQs at http://www.sansa.com/support/sansa_clip/faqs 02. Why won’t my Sansa Clip charge when I connect it to my computer? USB Cable
Make sure that the USB cable is properly plugged in and use the original cable.

Computer in Hibernation mode
Make sure that the computer isn’t entering hibernate or sleep mode while the device is connected. The computer must be on in order to charge your player.

USB Port 2.0
Make sure your player is connected USB 2.0 port (1.1 occasionally causes charging problems).

USB Port location
Try plugging in different USB port (i.e. USB port in the back of the computer); sometimes the front USB ports have problem charging up the device.

Battery
Make sure the battery is fully charged. It takes approximately 3 hours to fully charge the battery.

Latest firmware
Make sure to update firmware by downloading and installing the Sansa Firmware Updater.

I hope this helps, and don't forget to rate the answer.

Are you sure the cable you are using provides both data and power to the device? Some cables are data only and will not charge the device despite appearing so.

Has it held a charge before? If this is a new device and has not yet ran down then charged fully again yet, then I would return it.

charge it until the battery marker on the screen is full you should get up to 20 hrs. of battery life.

Enter the menu of the player - the picture for doing this is in the online version of the Sansa Clip user manual - http://www.sandisk.com/sansa/assets/English/products/Clip/Clip_userguide_en.pdf
Settings --> USB Mode --> MSC Mode

-Tha Mp3 Doctor

Locking the player will not allow the player to charge properly, no matter how long you have it plugged in.