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).
The dynamo output and safe battery charging rates and temperatures.
| Identifier | ExFiles\Box 62\3\ scan0034 | |
| Date | 28th February 1930 | |
| X. 6005 E.Y.E. I.D.59. Output of Dynamo on 14 G IV I do not consider the charging rate to be harmful provided the battery is not fully charged & not gassing to a great extent. Otherwise it would be harmful if continued for long periods because the temperature of the battery would exceed its permissible maximum of 110°F.{Mr Friese} A.G. | ||