| Year | 1922 |
| Date | 20-Jul |
| Volume | 47 |
| Issue | 1,108 |
| Page | 66 |
| Category | Radio Engineering |
| Part | 14 |
| Title | Wireless Notes - "H.T." Supply |
| Author | A.V.Ballhatchet |
| Notes | Five cells made up from renovated torch batteries, zinc and carbon elements for H.T. battery cells |