| Description | Date | Identifier | |
| Form for recording the routine treatment of car lighting and starting batteries. | 8th Jul 1924 | Box 54 \ 2 Scan138 | |
| Battery charging, weight, and cell density measurements. | 10th Jul 1924 | Box 54 \ 2 Scan139 | |
| Test log sheet detailing battery charging cycles, cell densities, and performance data. | 8th Feb 1924 | Box 54 \ 2 Scan140 | |
| Letter from The Chloride Electrical Storage Co. Limited regarding battery connections for a 40/50 HP Chassis. | 8th Feb 1924 | Box 54 \ 2 Scan141 | |
| Continuation page of a letter from The Chloride Electrical Storage Co. Ltd. regarding terminal and connection details. | 18th Nov 1924 | Box 54 \ 2 Scan142 | |
| Arrangement to stamp chassis numbers and identification letters on Exide batteries. | 18th Nov 1924 | Box 54 \ 2 Scan143 | |
| Requesting Exide stamp chassis numbers on the top of batteries to facilitate testing. | 12th Nov 1924 | Box 54 \ 2 Scan144 | |
| Electrical experimental record sheet for an Exide 6RR5/1/1 Battery (145). | 14th May 1924 | Box 54 \ 2 Scan145 | |
| Order for two specially configured Exide batteries for the Experimental Department. | 6th Apr 1925 | Box 54 \ 2 Scan146 | |
| Requesting to replace an Oldham battery with a standard Exide battery on chassis 98-NK. | 20th Apr 1925 | Box 54 \ 2 Scan147 | |
| Letter regarding a reply from The Chloride Electrical Storage Co. Ltd. about the manufacture of two battery types. | 21th Apr 1925 | Box 54 \ 2 Scan148 | |
| Ordering specific battery cells for a comparison experiment. | 23th Apr 1925 | Box 54 \ 2 Scan149 | |
| Instructions detailing the results of bench tests on an Exide 6RRS/1/2 battery. | 22th May 1925 | Box 54 \ 2 Scan150 | |
| Instruction sheet detailing the results of an experimental battery bench test after 10 months. | 5th Dec 1922 | Box 54 \ 2 Scan151 | |
| Receipt and ordering of experimental Exide battery cells. | 5th Jun 1925 | Box 54 \ 2 Scan152 | |
| Scheduled visit from Mr Mc.Kinnon of the Chloride Co. | 10th May 1925 | Box 54 \ 2 Scan153 | |
| The progress of two special Exide batteries with a specific cell design. | 11th Jun 1926 | Box 54 \ 2 Scan154 | |
| Letter to The Chloride Elec. Storage Co. Ltd. requesting a change from a quarter-turn plug to a screwed plug for the RR.5 type batteries. | 12th Jun 1925 | Box 54 \ 2 Scan155 | |
| The cancellation of a battery order and the fitting of new Exide and sandwich batteries to specific experimental chassis. | 17th Jun 1925 | Box 54 \ 2 Scan156 | |
| Diagrams illustrating different configurations for 40/50 Sandwich Batteries. | 17th Jun 1925 | Box 54 \ 2 Scan157 | |
| Communication with Chloride Electrical Storage Co Ltd. about a battery order. | 25th Jun 1925 | Box 54 \ 2 Scan158 | |
| Letter from The Chloride Electrical Storage Co. regarding incorrect information and delivery delays for two special batteries. | 24th Jun 1925 | Box 54 \ 2 Scan159 | |
| Peto & Radford cells received in error and seeking confirmation on a special 6RR5 Exide battery. | 27th Jun 1925 | Box 54 \ 2 Scan160 | |
| To arrange a meeting with the Chief Engineer of Chloride Electrical Storage Co. Ltd. regarding Exide Batteries. | 2nd Oct 1925 | Box 54 \ 2 Scan161 | |
| EFC to Wd. requesting an order for a standard 40/50 Exide single cell battery. | 2nd Nov 1925 | Box 54 \ 2 Scan162 | |
| Letter to Mr. McKinnon requesting feedback on premature failures of chassis batteries to aid in developing generator characteristics. | 26th Nov 1925 | Box 54 \ 2 Scan163 | |
| Letter discussing Exide batteries and generator systems for the 40/50 and 20 HP chassis models. | 8th Dec 1925 | Box 54 \ 2 Scan164 | |
| Letter from Chloride Electrical Storage Co. regarding lending a battery to Mr. Minchin for comparison, while disassociating from his findings. | 8th Dec 1925 | Box 54 \ 2 Scan165 | |
| Test results for an Exide 6RR5-1-3 battery, noting poor performance. | 14th Jan 1926 | Box 54 \ 2 Scan166 | |
| Letter from The Chloride Electrical Storage Co. Ltd. regarding the beneficial effect of wood separators in batteries. | 26th Jan 1926 | Box 54 \ 2 Scan167 | |
| Test results for terminal potential difference of standard Exide batteries for 20HP and 40/50HP models. | 11th Jan 1926 | Box 54 \ 2 Scan168 | |
| Inspection report on the failure of an Exide GRR5-2 battery after extensive road use. | 10th Mar 1926 | Box 54 \ 2 Scan169 | |
| Inspection report on the condition of battery cells, detailing sediment build-up and plate degradation. | 1st Dec 1924 | Box 54 \ 2 Scan170 | |
| Instructions detailing the reasons for a component failure involving cells, plates and separators. | 8th Dec 1924 | Box 54 \ 2 Scan171 | |
| Letter to a battery storage company regarding the inspection and testing of a 10,000 mile chassis test battery. | 30th Mar 1926 | Box 54 \ 2 Scan172 | |
| Detailed breakdown of the features and specifications of various Exide batteries delivered over time. | 30th Mar 1926 | Box 54 \ 2 Scan173 | |
| Electrical experimental record sheet for an Exide 6RR5/1/2 Battery. | 12th Jun 1924 | Box 54 \ 2 Scan174 | |
| Electrical experimental record sheet for the testing and failure analysis of an Exide 6RR5-1-2 battery. | 26th Mar 1926 | Box 54 \ 2 Scan175 | |
| Letter from a battery supplier discussing the premature deterioration of ebonite in an Exide battery and arranging for further investigation. | 31th Mar 1926 | Box 54 \ 2 Scan176 | |
| Dispatch of two standard Exide battery cells from a 10,000-mile test battery for inspection. | 8th Apr 1926 | Box 54 \ 2 Scan177 | |
| Requesting the return of an experimental sandwich battery from chassis 11-EX for comparative analysis. | 24th Apr 1926 | Box 54 \ 2 Scan178 | |
| Enquiry with Chloride Elec. Storage Co. about reducing the charging potential difference of Exide batteries. | 6th Jul 1926 | Box 54 \ 2 Scan179 | |
| Typed memorandum regarding the rescheduling of a visit from The Chloride Electrical Storage Co. Ltd. concerning Exide batteries. | 20th Jul 1926 | Box 54 \ 2 Scan180 | |
| Letter to a battery supplier discussing potential experiments to improve chassis battery charging. | 21th Jul 1926 | Box 54 \ 2 Scan181 | |
| Letter discussing battery experiments, charging terminals, and external dynamo control. | 24th Jul 1926 | Box 54 \ 2 Scan182 | |
| Letter from The Chloride Electrical Storage Company Ltd. acknowledging receipt of a letter. | 24th Jul 1926 | Box 54 \ 2 Scan183 | |
| Letter reporting on the performance of Exide and standard P & R battery cells during a 10,000-mile test on a New Phantom chassis. | 2nd Sep 1926 | Box 54 \ 2 Scan184 | |
| Letter discussing battery cell performance and acid retention during a 10,000-mile test in France. | 27th Oct 1926 | Box 54 \ 2 Scan185 | |
| Dimension discrepancy between P & R and Exide batteries. | 27th Oct 1926 | Box 54 \ 2 Scan186 | |
| Battery re-tests, detailing discharge performance and improvement over previous poor results. | 16th Dec 1926 | Box 54 \ 2 Scan187 | |
| Test report on an Exide 6RR5-3 battery, detailing low and high rate discharge results. | 11th Oct 1927 | Box 54 \ 2 Scan188 | |
| Letter from a battery supplier regarding battery modifications, life expectancy, and a suggestion for new tests. | 22th Nov 1927 | Box 54 \ 2 Scan189 | |
| Instruction sheet detailing the results of a battery test. | 11th Oct 1928 | Box 54 \ 2 Scan190 | |
| Graph chart recording an Exide battery discharge test. | 10th Jul 1924 | Box 54 \ 2 Scan191 | |
| Chart recording an Exide battery performance test. | 18th Jul 1924 | Box 54 \ 2 Scan192 | |
| Chart recording of a discharge test for an Exide battery, model 6RR5/1/2. | 21th May 1925 | Box 54 \ 2 Scan193 | |
| Letter from The Chloride Electrical Storage Company regarding a special Exide battery and a proposed visit. | 19th Apr 1929 | Box 54 \ 2 Scan194 | |
| Examination report on the failure of a cell in an S.S. Batteny (18a) fitted with Threaded Rubber Separators. | 24th Jun 1929 | Box 54 \ 2 Scan195 | |
| Cell failure caused by growth bridging across the positive plates. | 3rd Sep 1929 | Box 54 \ 2 Scan196 | |
| Comparison of two types of battery terminals from Exide cells, recommending the original type. | 3rd Sep 1929 | Box 54 \ 2 Scan197 | |
| Faulty modified fastening on Exide battery terminal lugs. | 1st Sep 1929 | Box 54 \ 2 Scan198 | |
| Arranging for two terminal studs to be sent to the Chloride Electrical Storage Co. Ltd. | 3rd Sep 1929 | Box 54 \ 2 Scan199 | |
| Letter from The Chloride Electrical Storage Company regarding battery terminal studs and positive plates. | 12th Sep 1929 | Box 54 \ 2 Scan200 | |
| Letter to The Chloride Electrical Storage Co. Ltd. arranging a visit for Mr. Mckinnon. | 13th Sep 1929 | Box 54 \ 2 Scan201 | |
| Letter from The Chloride Electrical Storage Company acknowledging a letter and confirming a visit to Derby. | 16th Sep 1929 | Box 54 \ 2 Scan202 | |
| Letter from Chloride Electrical Storage Company Ltd. arranging for their Chief Designer to visit Rolls-Royce to study battery cells. | 20th Sep 1929 | Box 54 \ 2 Scan203 | |
| Test results for an Exide 6RRS.1-3 Battery, detailing its performance and age. | 17th Nov 1929 | Box 54 \ 2 Scan204 | |
| Correspondence regarding a complaint about weak cell cases on 40/50 HP Chassis Exide Batteries. | 29th Jan 1930 | Box 54 \ 2 Scan205 | |
| Faulty Exide battery for a 40/50 HP chassis and its electrical test. | 31th Jan 1930 | Box 54 \ 2 Scan206 | |
| Forwarding a copy of a letter concerning the battery for chassis 73-JG, belonging to H.C. Cain. | 17th Mar 1930 | Box 54 \ 2 Scan207 | |
| Customer testimonial letter to Chloride Electrical Storage Co. Ltd. about the longevity of their battery. | 4th Mar 1930 | Box 54 \ 2 Scan208 | |
| Electrical experimental record chart for testing an EcclesX Battery (159). | 1st Jul 1925 | Box 54 \ 2 Scan209 | |
| Experimental record sheet for an Exide SX battery, logging mileage and test results. | 20th Jun 1929 | Box 54 \ 2 Scan210 | |
| Electrical experimental record sheet for an Exide SX Battery (159). | 9th Sep 1930 | Box 54 \ 2 Scan211 | |
| The failure of a cell in an Exide 6RRS-1-3 battery after extensive road and bench testing. | 14th Aug 1930 | Box 54 \ 2 Scan212 | |
| Battery cell capacity and high rate discharge tests. | 11th Aug 1925 | Box 54 \ 2 Scan213 | |
| Electrical experimental record sheet for an Exide 6RRS-1-3 battery test. | 11th Aug 1925 | Box 54 \ 2 Scan214 | |
| Electrical experimental record sheet detailing the testing of an Exide 6RRS-1.3 battery. | 14th Aug 1930 | Box 54 \ 2 Scan215 | |
| Letter from accumulator manufacturers Peto & Radford concerning a car regulator and battery performance. | 14th Dec 1927 | Box 54 \ 2 Scan216 | |
| Article describing a dashboard-mounted ampere-hour meter designed to measure a vehicle's battery charge. | 13th Dec 1927 | Box 54 \ 2 Scan217 | |
| Article from 'The Motor' magazine about motoring illusions and travel to Northern Ireland for road races. | 13th Dec 1927 | Box 54 \ 2 Scan218 | |
| Battery capacity meter advertisement from The Autocar and suggesting a patent search. | 16th Apr 1928 | Box 54 \ 2 Scan219 | |
| Advertisement page from 'The AUTOCAR' for Vokes battery capacity indicators and air filters. | 13th Apr 1928 | Box 54 \ 2 Scan220 | |
| Submission of an accumulator capacity meter from Messrs. J.H.Wedge & Co. | 1st May 1928 | Box 54 \ 2 Scan221 | |
| Cutting from 'Electrical Review' detailing a battery condition indicator for motor vehicles. | 7th May 1928 | Box 54 \ 2 Scan222 | |
| Test results for an Accumulator Capacity Indicator meter submitted by Messrs J.H. Wedge & Co. | 7th May 1928 | Box 54 \ 2 Scan223 | |
| Return of an accumulator capacity meter from Messrs. J.H. Wedge & Co. | 7th May 1928 | Box 54 \ 2 Scan224 | |
| Rejecting a battery indicator from J.H. Wedge & Co. in favour of an alternative green lamp system. | 24th May 1928 | Box 54 \ 2 Scan225 | |
| Circuit diagram for connecting compensated ampere-hour meters from The Central Mfg Co., Walsall. | 24th May 1928 | Box 54 \ 2 Scan226 | |
| Explaining the function and testing of Battery Capacity Ampere Hour Meters and Accumulator Capacity Indicators. | 24th May 1928 | Box 54 \ 2 Scan227 | |
| Continuation sheet discussing battery conditions, charging, and potential issues in new cars. | 24th May 1928 | Box 54 \ 2 Scan228 | |
| Continuation sheet discussing battery performance, charging, deterioration, and fault diagnosis using Ampere Hour Meters. | 24th May 1928 | Box 54 \ 2 Scan229 | |
| Continuation of a note regarding instruments for battery charging, referencing an enclosed blueprint. | 24th May 1928 | Box 54 \ 2 Scan230 | |
| The function and testing of Battery Capacity Ampere Hour Meters and Accumulator Capacity Indicators. | 24th May 1928 | Box 54 \ 2 Scan231 | |
| Guide on battery maintenance, fault finding, and the use of associated monitoring instruments. | 18th Jun 1928 | Box 54 \ 2 Scan232 | |
| Request to test a sample of a Battery Capacity Indicator from Messrs. C.G. Vokes & Co. | 18th Jun 1928 | Box 54 \ 2 Scan233 | |
| Copy of a letter from Messrs. C.G. Vokes & Co. regarding a new Battery Capacity Indicator instrument they are offering for testing. | 11th Jun 1928 | Box 54 \ 2 Scan234 | |
| Test report on two battery capacity and ampere-hour meters from C.G. Vokes & Co. | 10th Jul 1928 | Box 54 \ 2 Scan235 | |
| Instructions sheet with handwritten notes on battery instrument readings and consumption. | 8th Dec 1924 | Box 54 \ 2 Scan236 | |
| The testing of two battery capacity ampere-hour meters from C.G. Vokes & Co. | 12th Jul 1928 | Box 54 \ 2 Scan237 | |
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