E5470 Different Batteries Compatibility

Hi,

I have a couple of Latitude E5470 Laptops with battery problems. I ordered new batteries but after replacing, none of the batteries are recognized :s

Same thing had happened last year as well, whereby the battery ordered had a different voltage. So this time I took that into consideration as well.

These work fine: Type 6MT4T, 62Whr, 7.6V, min. 7750mAh
These don't: Type R0TMP, 62WHR, 7.6V, 8260mAh

What gives? Can anyone assist to clarify the difference in batteries and their voltage and mAh? Attached pictures as well if required.