I charged all batt one hand set does not work.i

If the phone is still under warranty, take it and the offending handset group back for exchange; otherwise assume you have one or more dead cells in the pack. To verify this swap out battery packs to see if the phone they were transferred to works. If it works leave 'em in for a while and check again. Using the phone will cause a heavier drain on the batteries. Is possible the unit may need replacing.

Hope this helps.