Hey guys its time to change out my battery... I just came back from LA and its not getting enough juice and this isn't the first time it has happen. (Me being lazy in getting a new battery after a few times this has happened ).

But yeah just seeing what you guys are using as a replacement for the OEM battery. I was considering a Hawker Genesis or the OEM. Any other brands good out there or that you have experienced? Hoping to spend around 120 or under

 

I'd go with an Interstate battery. I think the S uses an MT51 which is definitely less than $120.

 

My car has had unusual starting problems a couple times in the past couple months. I don't think it's battery, but I've been meaning to ask about batteries too.

 

I'm going to take a guess and say it's an ignition switch

OR

Could be this service bulletin.

Service Bulletin
© 2009 American Honda Motor Co., Inc
February 6, 2009
02-053

Immobilizer System (Type 4)
VEHICLES AFFECTED
2006–09 S2000

All of the vehicles affected have a Type 4 immobilizer
system that disables the vehicle unless a programmed
ignition key is used. The Type 4 system is different
than previous systems in that the transponder ID code
in the key is a rolling-type code instead of a set code. In
this service bulletin, a programmed ignition key refers
to a transponder-type key that has been cut to fit the
ignition switch and whose transponder ID code is
recognized by the immobilizer system. If you try to start
the engine without a programmed ignition key, the
engine cranks, but it does not start.

I can get you more info on that if you need.

 

NRG Cell Original Battery - 11.5 lbs (http://www.heeltoeauto.com/ - Marcus is a good guy.)

Had it for 2+ years now w/o any issues.