| LS | Title | From | To | Approval date |
| COM 5 - LS 104 | Reply to Liaison from IEC TC100 on universal Li-ion battery solution | SG5 | IEC TC 100; | 2012-04-19 |
| IEC TC 100 - LS 4 | Liaison letter to ITU-T SG5 on universal Li-ion battery solution | IEC TC 100 | SG5; | 2012-01-16 |