Charger LED dim, computer wont turn on

Just today I was using my computer when the battery died. After this I plugged in the magsafe adapter to charge it, and it would not charge. The LED on the magsafe is very dim, leading me to believe that the charger is not working. But, I tried using two other peoples magsafe chargers, one of which had a bright light and did not charge my computer, the other had a dim light and did not charge my computer. So does my battery need to be replaced? Any thoughts would be appreciated.