Completely draining a lead-acid battery is about the worst treatment you
can give it. It certainly can kill the battery even if it happens just
once. I can't imagine that it would be covered under warranty but it
does not hurt to ask.

KN wrote:
>
> 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