So my Honda Fit is 4 years old, but it is a 2010 as I bought it in November of 2010 on a closeout sale. The battery that came in the car had some slow starts last year and I figured I'd change the battery before this Winter 2015. I went to WalMart and bought a 51R, and it fits nice but I wasn't able to fit it diagonally. I didn't want to buy connectors to migrate the positive post over as it makes for a bit of a contraption. So I returned the battery. I called around and Interstate batteries are around 220$ for this car (called two places). Honda wanted 135$, NAPA wanted 119$ Called Carquest, and they wanted 109$ So I picked it up, as I was pretty sure it is made by East Penn (Deka). I called East Penn yesterday and they said Carquest and Napa are Deka, Deka directly wanted 135$ and the guy recommended Carquest or NAPA. So now I am the proud owner of a new Carquest battery. It was 12.3V so it was really low, I have it on trickle charge 2A right now, will probably leave it on for 6 hours before installing it in the car. I was wondering if anyone knew how to identify a Deka battery? This thing looks completely sealed, I don't think you can fill it with distilled water at all. It has an awesome carry handle, and is a nice matte finish. Solid looking battery. It has a electrolyte viewport, with a green gauge at the bottom. This looks like a really good battery. Thanks guys.