All it says is low battery

If the recharageable battery is more than 3 - 4 years old then the battery could be worn out.Rechargeable batteries have a finite number of charge and discharge cycles andwill lose their charge capacity over time, i.e. won't charge to 100% and graduallythe charge reduces until the battery won't charge up at all. OR The batteryshows a 100% charge but when the adapter is disconnected the battery drops offto zero capacity in a very short time. If the battery drops to an unacceptablecharge level then the battery needs to be replaced.

There is a trick to charging the battery in these small mp3 players. It won't charge if it is turned on, and it won't charges if it's turned off. Here's what to do...
1. plug the player into your USB port. or wall charger
2. switch the player on using the mechanical switch (on the side)
3. turn it off by either holding down the play button, or selecting "System" from the menu
4. The screen will go black and the battery will begin charging.
That is if the battery is still chargeable after all this time. The battery may well require replacing.

your device is corrupted and you need to reformat it.

not sure if this will work...but mine wouldn't charge, be recognized by the computer or turn on and this solutions fixed it all right away:
posted on Feb 25, 2009 abeales
If you have windows set to do automatic updates, you most likely had a windows update installed that caused this conflict with Win Media Player 11. No fix has been posted by Microsoft yet, so the only workaround is to Uninstall/Rollback Windows Media Player 11. Goto <Control Panel<Add/Remove Programs and remove Windows Media Player 11. Follow prompts, restart computer when prompted to. Also uninstall Windows Media Player 11 Runtime application following same procedure above.
This will roll your Windows Media Player back to version 10 or 9, whichever you had installed prior to version 11. You will need to re-configure Windows Media Player again.

Your Zen should now be recognized by WMP and Creative software. You probably need to upgrade your firmware at this point, follow the instructions on upgrading your firmware, and you should be good to go.

This is a windows problem, not a creative problem. Dont blame Creative for the screwed up hotfixes that Microsoft puts out on a regular basi

i held down the power button for about 10 seconds in resoponse to another answer when I was having the same problem as you, and then mine began to charge, when it would say battery is full before, but not work because of low battery. hope this works for you.

Make sure it is connected to a computer with a working USB 2.0 hub - if it doesn't charge that way, then the hardware is damaged, and the mp3 player will need to be replaced - cut and dry - no ifs, ands, or buts

You all need to get the latest firmware upgrade from Sansa's website.

The battery life is short - you must recharge every day

Must recharge every day by replugging into your computer

if you plug it in to the computer mabe the drive cant charge it in some computers some drives dont charge the mp3s it happened to me but try to connect it to different arias and if that doesnt work buy the wall charger hope it helps.