Log sheet detailing cell densities and the fourth battery charge cycle with timings and ampere-hours.
| Identifier | ExFiles\Box 38\5\ Scan013 | |
| Date | 26th April 1917 | |
| H.R. Bks (500 T) (S.D. 408. 26-4-17.) Bm. 2/156/13. -4- Contd. (14) Cell densities. (1) (4) (2) X (5) X (3) (6) (15) Fourth charge. From. To. Hrs Amperes. Ampere hours. 4. 5.30 1 1/2 4 6 8.30 5.30 9 6 54 5.30 4 9. 5.30 8 1/2 4 34 Total ampere hours 94 Cell densities. (1) (4) (2) X (5) X (3) (6) | ||
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).