Battery is dead wont charge and when i try to switch it on a red light flashes

I assume you mean a JBL Charge. As for that specific model I am unfamiliar, however if when you try to charge electronics they will only flash a red light that's usually a battery or charger error signal. Most likely either a battery in the battery pack has gone bad, a contact has come loose or your charger has broken. Did you happen to drop it shortly before this error occurred? Also was the battery completely dead right before this happened? Sometimes I have noticed wireless devices will refuse to charge a battery if it is completely drained.

just remove the battery and reinsert it once again ..........

The rechargeable battery sounds like the main problem, but the charger needs to be checked to make sure there is not a secondary problem.

Indicator Lights:
1.Headset Status Headset Indicator Light
2.Powering on Steady blue, then intermittent flashes
(changes to standby mode)
3.Powering off Red appears and goes off
4.Standby Blue intermittent flashes
5.Charging battery Red solid light. Light indicator turns off when
battery is fully charged and headset is off.
6.Low battery Triple red flashes
7.Pairing mode Blue/red alternating flashes
8.Missed call Purple flashes. Press the call control button
to cancel flashing light.
9.Incoming call Triple blue flashes when ringing.
Power on and off:
1.Turn on the headset Press and hold the call control button until the
indicator glows blue. You will hear ascending
tones.
2.Turn off the headset Press and hold the call control button until the
indicator glows red. You will hear descending
tones. When power is off, indicator stays off.
If none of this is helpful then it may be that your battery is dead, if that is the case then you will need to replace the whole headset. The battery's are not replaceable.

Good luck from Headsets Direct!

Is your DS old? If your battery is charged 500 times, it won't work anymore says Nintendo. Anyway, get it fixed by Nintendo!

I found this while trying to solve my exact same problem.. It worked for me after about 7 times. Some other people on the site said it worked for them after 20 times. Good luck!

My NP 20 gave me the flashing red light of death and I got Casio to replace it. Then I had the same problem with my second NP 20 so I dug around for a way to fix it and I found the following advice on a site called FixYa. It worked instantly and I didn't risk ruining my battery.
ylu1 writes:
I had the same problem as this.
what i did was...
i kept putting the battery on the charger then took it off as soon as the red light came on.
i did this about 6 times.
doing this puts a bit of charge in the battery each time before the charger starts to flash.
after the battery as got enough charge in it it can start to charge.
hope this helps.

I had the same problem. I had a 1 year warranty, so I called 1800-435-7732 and they sent me a new battery within 5 days. I just received it today and it works perfectly. Hope this helps you! =]

sounds like a dead battery. Plug the origional charger into it and the front led (below the flash) should flash red. If the red led in the back of the camera flashes or stays lit, then you have the wrong charger plugged in. (the camera won't power up if the back red/green led is on when plugged in)

When it is red light of death, it either means the bootloader of the phone is faulty (after uploading dodgy firmware updates), or the battery is too empty to start-up, let alone display charging progress. In your case you need to leave the phone charging even with the red light flashing and it will be fine. Give it a few hours connected to the charger.