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 accessibility, maintenance, and charging of car batteries.
| Identifier | ExFiles\Box 168b\3\ img014 | |
| Date | 23th March 1928 | |
| FR/EV.{Ivan Evernden - coachwork}) FROM R.{Sir Henry Royce} HFO } (At Le CanadelHenry Royce's French residence.) HS.{Lord Ernest Hives - Chair} } C- to BJ. WGR. PN.{Mr Northey} BY.{R.W. Bailey - Chief Engineer} CHR. C. HP. SC. X7535 CAR BATTERIES. These must be very conveniently accessible without detaching any electrical connections or moving the battery in any way. We ought to be able to take the acid density with the standard apparatus supplied by the battery makers for that purpose, and fill up with a very small jug, or other easily obtainable utensil. I have not sufficient experience to say how often the battery should be examined for filling up, but one might guess every 500 or 1000 miles, or once or twice a month according to the distance run, or other circumstances. We should more glaringly point out that where-ever there is trouble of too little charge, a very small charging current should be run through the battery while the car is in the garage. Under some circumstances there is no other way of meeting the difficulty, because a bigger dynamo will charge the battery too quickly, and some-times too much, resulting in destruction. R.{Sir Henry Royce} | ||