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).
Table of performance data for experimental chassis lighting and starting batteries.
| Identifier | WestWitteringFiles\D\May1920\ Scan57 | |
| Date | 8th February 1913 | |
| -2- TABLE OF PERFORMANCES of EXPERIMENTAL CHASSIS LIGHTING AND STARTING BATTERIES. Ref No. | Maker and No. | Description Type | Cell or Ebon. | Weight complete with acid (lbs) | Rated a.h. capacity (10-hr rate) | Ia. Actual capacity at constant current of 1/10 of Rated capacity (to 10.5 Volts) (a.h.) | Ib. Ampere hours per pound. | II. Initial current through .0763 ohm and time to fall to 100 amps. (a) Amps. / (b) Mins. | III. Time of discharge (Amps. / Mins. / Amps. / Mins.) | IV. Time of discharge (hours) 10 | Chloride 607 | 6BXE5 50 E1 (a) | E | 82 1/4 | 55 | 68.75 | .833 | 137 / 15.65 | 135 / 20+ / --- / --- | 6.35 11 | Chloride 607 | 6BXE5 50 E2 | E | 82 1/4 | 55 | 55.0 | .666 | 132 / 14.14 | --- / --- / --- / --- | --- 12 | Tudor 979 | Special E | E | 97 1/4 | 60 | 69.0 | .706 | 136 / 15.06 | 135 / 15.73 / 135 / 20+ | 7.90 13 | Premier 1080 | Special E | E | 92 1/4 | 40 | 38.2 | .412 | --- / --- | --- / --- / --- / --- | --- 14 | P & R 3398 | PDL. 9 | E | 97 1/4 | 60 | 51.0 | .522 | 136 / 6.53 | 135 / 4.23 / 134 / 3.24 | 4.60 15 | Chloride 607 | 6BXE5 (b) | E | 82 1/4 | 55 | 66.0 | .800 | 141 / 10.84 | 140 / 15.82 / 142 / 19.17 | 6.05 18 | Chloride 607 | 6BXE5 (e) | E | 82 1/4 | 55 | 67.5 | .818 | 133 / 11.40 | 135 / 12.77 / 138 / 14.55 | 5.45 20 | Lucas 3 2676 | 1260 | C | 79 1/4 | 60 | 69.0 | .868 | 137 / 9.36 | 137 / 9.87 / 138 / 7.83 | 5.80 Footer Text: E H 03 (20.L) (12 L) 212 8-2-13 | ||