As Traylaw has already shared, your CRV comes with an H5/LN2 (Group 47) EFB battery as it's OEM battery.

Generally, new H5s (regardless of type) will be spec'ed from the battery factory as 650 CCA. Fully charged, they will generally test at 750-800 new at 70 degrees F. But batteries for OEM install during vehicle assembly might be on the "lighter weight" category for CCA. Double check with Honda on what the official CCA should be for the OEM battery.

Happily, the Group47/H5/LN2 battery class is among the most popular of battery sizes in new vehicles now days. the 51Rs seem to be deprecated now for all but the subcompact class of vehicles. So, when it comes time to replace your battery, should be easy.... but I would note that this size segment in batteries appears to be moving rapidly toward AGM style designs, and the rest EFBs. Reason driving this: Auto Start/Stop, which requires either an AGM or EFB just for the number of starts available in the battery life cycle (roughly 10X what you would get from an old group 47 flooded cell battery design).

 

Yes, it will charge your battery just fine. An EFB charges the exact same way as an old standard battery

 

The label on your battery says 450, that's what the manufacturer rates the battery. The meter compares the "entered" CCA number to the estimated CCA value which is based on the measured internal resistance to determine a good/bad condition. The meter uses the battery type you entered for estimating the CCA (based on measured resistance) and calculate the state of charge on the battery.
It's a good idea to write the estimated CCA value on the top of the battery. Over time you will see this value slowly decreasing, one day you will notice it's decreasing quickly....time to start thinking about a new battery.

 

I have a Battery Tender Power Plus! 3a charger. E-mailed the company to see if it will charge the battery appropriately.

 

OK, the group size 47 they are also known as H5 or LN2 depending on the country. They usually come in three versions Flood cell ( standard lead acid), EFB "Enhanced Flooded Battery" and AGM. Your's is an EFB. Your meter and charging equipment should be set to a standard flooded lead acid battery. The EFB battery is what you get when a Flooded Cell battery mates with an AGM.

 

Here are the testing I've found.. Is it a 450CCA?
EFB Setting Test

AGM Spiral Setting

AGM Flat Plate setting

 

Take a pic of the top of the battery. I think you have a H5/EFB LN2. It's normal for a new battery to read a much higher CCA than listed on the battery. It is interesting you only have a 48% charge. Also you meter doesn't actually measure the CCA of the battery. The CCA is an estimated value based on the internal resistance, in your case that would be .0048 ohms.

 

Take a pic of the top of the battery. I think you have a H5/EFB LN2. It's normal for a new battery to read a much higher CCA than listed on the battery. It is interesting you only have a 48% charge.

31500-TLA-A11 is the battery P/N Just have to figure out what to set the tester for there are 2 AGM settings