What's a good SMALL battery with limited space?

Yeah, I've been looking at them, I used to swear by the Optimas, but since the prodution moved 'south' I tend to more swear at them.

 

Inexpensive battery is group 51 or 51R (depends on where the posts are.
This is a common Honda battery available anywhere and is very small but still has good CCA.
We Corvair people use it in place of the Group 53 narrow battery which is not common anymore.

 

I've been looking around at specs, sizes, etc. the last couple of days, and had been leaning towards the Odyssey.
But looking on their web site, they are saying you must use an "approved" battery charger, and they list the acceptable ones. No mention of the parameters used in this list's compilation.
Optima, on the other hand, gives specs as to voltage and amps, according to what type of charger you're using, such as trickle, slow, medium or fast charger, along with temps limitations. Also whether constant rate of charge vs the "smart chargers" that taper back as the batt. charges up.
IMO, the Optima way helps a lot in determining whether you can used the charger you have or not.
Anybody have any first hand experience with charging the Odyssey batteries?
Dave

 

This. The miata batteries are AGM units that last forever and a day if you take care of it. Very small too. The one in my '94 miata I used to own was replaced the first time in 2003. Mazda original is better than aftermarket, last I looked it was $120, but that was some years back.

Not sure if newer ones use the same type of battery, but 90-97 does for sure.

 

somewhere up there i have a link listing the specs for the charging parameters. it's not current, it's voltage, you need a specific parameter for charging voltage and voltage for trickle charging. as far as current, they have no real limits on charging current. thats one of the things about them, if you can control the voltage you can bring them back up quickly with a lot of current.