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).
Report to Mr. Wormald comparing the weight and performance of Premier, Edison, and C.A.V. batteries.
| Identifier | ExFiles\Box 1\7\ B001_X15 20 46 50 59-page214 | |
| Date | 11th March 1913 | |
| R.R. 285A/100 T/ (S G.{Mr Griffiths - Chief Accountant / Mr Gnapp} 645. 19-2-20) G 2818 Mr. Wormald. X.50 11.3.13. *,664 - BATTERIES. X.50. X.560. Copy of sheet 24.12.12 EM5/E241212. Re Cell Weight. Premier 8 volts including box... 44 lbs 10 ozs. Edison. 8 volts including box... 32 lbs. 10 ozs. Report re Edison Cells. I have had Edisons cells in constant use since previous report 26.11.12 and I find they give good results on the coil systems having had as much as 47 amp.hours work. out of them. I have had 58 amp. hours out Exides (40 amp. hour cells). The Edison cells behave extraordinary when left standing. I have had the experience of completely running down the cells to .5 volts and left standing 10 hours and recovering themselves to discharge again 20 amp. hours (7 amp.discharge). This same cell acted in this way 3 times before discharging. The C.A.V. cells are inclined to drop when left standing. I have not taken any discharge curves of C.A.V. yet having to rig up a board for charging same so that I will know what is put into them. All reports are from Test Garage charging. | ||