Samsung INR18650-25R Question

[The Juice Loosener]

I have four Samsung INR18650-25Rs. They are identical to some of the pictures I've found online and look like this:

My question is about that last number/letter combination on the bottom right. Mine say 2FA2, but other than that they are exactly like this picture. What do those figures represent? Is that just like a batch number or does it tell something about the battery's power/output/lifespan?

I have zero complaints about the product as the pair pushes my XCube II from 4:30am when I get up to 10-11pm when I go to sleep with energy to spare. I've just wondered about those four little numbers/letters since I got them. Thanks in advance to those more knowledgeable and tech-savvy than myself.

 

[vap3r]

Lot and production date code. F = 2015. I received a pair of 25R5 just yesterday with G = 2016.

 

[The Juice Loosener]

Lot and production date code. F = 2015. I received a pair of 25R5 just yesterday with G = 2016.

Thanks for the info!

*Terrorist fist bump*

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[Oracle]

Really long exposure of it!

 

[Jon@LiionWholesale]

Just confirming vap3r is correct, it's batch and date code.

 

[suprtrkr]

+1. It's a lot number.

 

[The Juice Loosener]

Lot and production date code. F = 2015. I received a pair of 25R5 just yesterday with G = 2016.

I've seen these quite a few places so I figured they were decent. How would you rate them compared to, I don't know, Sony or eFest batteries?

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[raymo2u]

It means you should buy some for me...I love sammies