I have a
Dell Latitude E5470(service tag: DFZGFC2). I'm looking for a replacement battery that matches the original(47Wh/11.1V), unfortunately I can only find one with the specs (51Wh/7.4V) I was thinking of getting it but the laptop manual only mentions the original battery and a 62Wh/7.6V as compatible.
Will the 51Wh/7.4V battery work or not even though the store that has it says it will?
That sounds like you are referring to an aftermarket battery. If that is the case, I wouldn't do it, even if the specs matched. Aftermarket ones are hit or miss and cause way more problems than I can mention. I would suggest getting an OEM battery.