No, there's no limit to scanning documents while opting for Batch Mode in Zoop Wallet. You can scan multiple pages as much as you want without any restrictions.
However, it's important to note that if the size of the final scanned document exceeds 100 MB, the scanned document will be saved only locally in your device and not on the cloud storage. This means that large batches of scans exceeding this size will be stored on your device rather than in the cloud.