From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Graph showing the discharge capacity test results for a set of 6 L.B. cells.
| Identifier | ExFiles\Box 1\7\ B001_X15 20 46 50 59-page263 | |
| Date | 24th December 1920 guessed | |
| X.50 Discharge Capacity Test of Set of 6 L.B. Cells Rate of discharge in Amperes Time in hours v=8.1 v=7.9 v=7.35 v=6.95 v=6.65 v=6.7 v=5.6 v=5.45 v=5.5 v=5.05 v=5.2 v=1.9 Capacity to 5.5 V=32.9 4.9 V=42.8 C Ampere hours | ||