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).
Description of the 12-volt electrical system, accumulator reliability, and the prevention of battery undercharging.
| Identifier | ExFiles\Box 54\2\ Scan052 | |
| Date | 9th April 1925 | |
| X4617 Extract from R1/M9.4.25. EAC. DESCRIPTION. X.8780. X.4617. This model retains the same 12 volt electrical system, and we are pleased to say that accumulators, like tyres, are now much more reliable, but still the chief thing to guard against is undercharging, as any lead battery left uncharged is rapidly degenerating, and if possible it is extremely good to arrange that when the car is in the garage, a very small current can be run through it, about 1 amp. or less. RR. have done all that is in their power that is at present known by making the dynamo to cut in at an extremely slow speed, and to fall off at high speed, (therefore favourable for under and overcharging). | ||