Took out the battery today to show someone (the battery) and I put it back in and all i get is a flashing red light. I charged it all day, and nothing happens. just wanna cry

Hi! My phone had exactly the same problem a few days ago! I got a new battery - it worked fine for a couple of days and here we go again... It is dead! Please let me know what you did with your phone! I have a new BB curve! Thank you!

I had the exact same problem so I went searching for an answer. Here's what I found and it really did work. I had to do it about 7 times... and I read others had to do it about 20 times. But worked for them as well. 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.

get a message saying my USB is not sufficient enough to charge phone ???? It works on other computers just not the one I need it to work on.

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! =]

Try removing the Sim card and re-inserting it.

I have an answer for the 3-2 red light blink w/black screen. Remove the battery, hold the end call button and put the battery back in. The red light should stay on for a while now. Push and hold the call button and alternate with the end call button untill the hourglass shows. Allow some time to boot up. I stumbled upon this, so if this doesnt work, try simmilar procedrues. I did get mine to work. Good Luck, dont give up, it flashes that 3-2 code for a reason.

dear
you have mentioned that ur phone is charging and not getting on. that means ON\OFF path is having problem .due to dry solder of ON\OFF switch its happening. please resolder it and then check it

the batteries lose their memory and need to be shocked back to life.. Here's the fix:

"Hi,I just found a soultion on another website and it appears to have worked for me.Apparently the battery loses it memory when fully discharged,to fix this take a 9v battery and place the terminals + to + and - to - with the camera battery for 30 seconds or so then put the battery back in the camera and charge as normal.I just did this and it seems to be charging and the red light is solid.hope this helps."

Please check the charger connector for dirt, if possible take an old toothbrush and clean with alchohol, let it dry and refix everything. should work.