Ml270 Battery problem

[calgord]

I've got a problem with my battery. Its a MB Exide 500A 100Ah. I've just had it tested andf the results are as follows:
SAE 500A Good Battery
EN 500A Good Battery
DIN 500A Unserviceable.
I'm really confused about SAE, EN and DIN. There is no sign on the battery itself. I would be grateful for any help as I don't want to spend megabucks on a new battery if this one is Ok and I have another problem.
Thanks in anticipation
Calgord

 

[joecash]

http://www.partinfo.co.uk/files/How%20A%20Battery%20Works.pdf may help

 

[calgord]

Thanks for that - very helpful