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).
Testing a PHR 7 battery from the Chloride Company, comparing it to standard models.
| Identifier | WestWitteringFiles\D\May1920\ Scan55 | |
| Date | 18th May 1920 | |
| R.R. 235 A (100 T) (S.F. 846. 6-8-19) G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 2460. Contd. -19- EFC1/T18.5.20. The table will show that this battery (23) did as correspondingly well in comparison with its size as the standard size 6 BXE 5. We have also recently received from the Chloride Company a PHR 7 type battery (27) containing thicker plates than standard. The Chloride Company were rather keen on our testing this battery in comparison with the standard. They seem to desire that we should ultimately use the thicker kind of plate. It may be remembered that our present thickness of plate is intermediate between the very thin plates as used in American practice and the thick plates as used by some British motorcar firms. This PHR battery has done well on the tests, and will be put on the vibration test later, as it is considered that its life may possibly be more than our present standard. The external features of this battery are very similar to those of the Willard thread rubber and the same remarks re connections, etc., apply. EFC. | ||