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).
Instructions on battery electrolyte and terminal maintenance.
| Identifier | ExFiles\Box 26\2\ Scan092 | |
| Date | 1st August 1919 | |
| -6- Contd. time. It is important that the battery should be kept fully charged but not overcharged. Inspection of Electrolyte. The level of the electrolyte in the cells, should be inspected frequently and maintained to cover the plates by 3/16" by the frequent addition of distilled water. Use a syringe type hydrometer to take the densities of the electrolyte in the cells, which should be 1.200 - 1.250 when in a fully charged condition and after standing for an hour. If the density under these circumstances is low, remove as much acid as possible by means of the hydrometer and replace with new acid of density 1.250. If it can be found convenient to effect this change of acid when the cells are in a partially discharged condition and the electrolyte consequently of smaller density, a proportionately bigger gain in density is secured after charging. As far as possible arrange to make changes in the electrolyte just previous to charging. Every twelve months the acid should be renewed, but only when the battery is fully charged. The top of the battery should always be kept clean and as far as possible dry; attention should immediately be given to the least sign of corrosion occurring on the terminals. Keep the terminals and connections lightly greased, clean on their surfaces in contact, and firmly screwed up. Contd. | ||