When accountants are talking about batches, they are usually referring to settlement batches. Settlement batch data is generally not created by Luminate Online but rather by the gateway account, merchant account, merchant bank, and/or constituent's bank. That data is then passed on to us where it is recorded in Luminate Online. Most settlement data occurs within a few hours of the transaction so that the settlement batch is the same day as the donation. However, this is not always true and thus cannot be relied upon. Generally speaking we recommend doing a transaction by transaction reconciliation as opposed to a settlement batch reconciliation. Below are a few related solutions.

Some of the credit card transactions didn't settle in 12 hours or less
Transactions aren't settled in time for scheduled sync to run
How long does an ACH transaction take to settle?