Over the time people have realized that MBOX file format is great when we want to preserve email at mailbox level and at individual level eml format is the preferred choice. So it is wiser to convert mbox to eml format if you are planning to archive your mbox emails.
MBOX fails in one aspect that it fails to maintain folder structure which is a significant and imporatn properties of email data. EML format helps to overcome this limitation.
Each individual eml message contains text and html formatting, message path, header, date/time and other crucial information all intact and preserved.
The mbox to eml software helps you in the conversion process by taking care of all the minor details. Every mbox format emails are transferred to eml format with all their Meta information as well as attachments if any.
The software is designed to work on minimum configuration hence the software can be installed on minimum hardware configuration.
You don't need any preinstalled email client for the mbox to eml conversion process as the software is independent and can perform the conversion without any dependencies.
Yes the software is full compatible and let you perform the batch export of mbox file to eml format and you won't be having trouble for batch conversion.