If paid will old charge off accounts with small balances raise your credit score?

Probably not significantly if at all. Even if they are paid the entry will remain on your report for the maximum 7 years.

There are some circumstances under which paying off an older charge off/collection will lower your score, not raise it. The determining factor is when the account was "last reported" (by the creditor) to the bureau. If updated within the past 12 months, the account is having a significant impact on your score and paying it off does no damage. If, however, the account has not been reported recently - paying it causes it to be updated to NOW, thus bringing the date within that critical 12-month time frame. This date (reporting date or "status" date) is the date that causes deductions to your score when coupled with derogatory data, like the charge off notation.