Honda civic 2004 battery problem
 

Hi,

I have recently purchased Honda Civic Ex 2004. It only has 200 mi on it.
Couple of days ago, i accidentally left one of the internal light turned on
for around 13-14 hours. Next day i tried to start it but it would not. in
fact i was not even able to use key-less entry and had to use the key. My
neighbour helped me jump start and i took it to a nearby pepboys for
charging. I also asked them to check the conditon of battery (for which
they also charged $$, so it was a professional check). They charged the
battery but told me that battery was pretty weak and i should go to the
dealer and have it replaced because obviously i still have warranty. I have
2 questions:

1.Is it possible that battery really became so dead that it needs to be
replaced ? it was in a brand new car !!!
2. Obviously it was my fault that battery drained. would the warranty still
be valid ?

thanks
kn