| Description | Date | Identifier | |
| Performance chart logging average amperes and ampere-hours over time. | 7th Jan 1930 | Box 58 \ 3 Scan196 | |
| Chart recording the results of an electrical battery discharge test. | 14th Jan 1930 | Box 58 \ 3 Scan197 | |
| Graph chart recording of a battery performance test. | 20th Oct 1930 | Box 58 \ 3 Scan198 | |
| Chart recorder graph displaying the results of an electrical test, including average amperes and ampere-hours. | 19th Jun 1930 | Box 58 \ 3 Scan199 | |
| Chart recorder graph showing the results of an electrical test, likely a battery discharge test. | 22th Dec 1930 | Box 58 \ 3 Scan200 | |
| Test chart recording electrical current over time with calculated results. | 18th Mar 1930 | Box 58 \ 3 Scan201 | |
| Chart recording of an electrical test showing amperage over a 12-hour period. | 19th Mar 1930 | Box 58 \ 3 Scan202 | |
| Fault with P&R + Exide B.U.C. batteries where vent plugs allowed acid to spray. | 5th Apr 1931 | Box 58 \ 3 Scan203 | |
| Electrical experimental record sheet logging the performance of an Exide battery. | 20th Apr 1931 | Box 58 \ 3 Scan204 | |
| Electrical experimental record sheet for an Exide 3RR5-IL-4 Battery, tracking mileage and modifications. | 20th Apr 1931 | Box 58 \ 3 Scan205 | |
| Letter comparing test figures for modified and standard batteries at a temperature of 50°F (10°C). | 4th May 1931 | Box 58 \ 3 Scan206 | |
| Letter from Peto & Radford acknowledging information about tests on the 3-RRN11 battery. | 7th May 1931 | Box 58 \ 3 Scan207 | |
| Requesting to book in a National accumulator, type 6TB6S-7E, delivered by Mr. Minchin. | 19th Jun 1931 | Box 58 \ 3 Scan208 | |
| Battery tests for excessive gassing and corrosion on Chassis 37-WJ, with recommendations for repair. | 1st Jul 1931 | Box 58 \ 3 Scan209 | |
| Sending a battery from chassis 37-WJ to the makers for investigation due to excessive gassing. | 3rd Jul 1931 | Box 58 \ 3 Scan210 | |
| Request to obtain two standard 6-volt batteries for an experimental 40/50 chassis. | 1st Sep 1931 | Box 58 \ 3 Scan211 | |
| Letter to The Chloride Electrical Storage Co. requesting samples of a positive and negative plate and separator. | 31th Dec 1931 | Box 58 \ 3 Scan212 | |
| Letter from an electrical storage company confirming a sample of battery plates and a separator for a 6-volt unit will be sent. | 4th Jan 1932 | Box 58 \ 3 Scan213 | |
| Experimental record sheet for a P+R RRN 11-1 battery, tracking its testing and mileage. | 20th Apr 1931 | Box 58 \ 3 Scan214 | |
| Electrical experimental record sheet for a P & RDRN11-2 battery. | 20th Apr 1931 | Box 58 \ 3 Scan215 | |
| Electrical experimental record sheet for a P&R BRNII-3 battery, logging usage, mileage, and modifications over time. | 20th Apr 1931 | Box 58 \ 3 Scan216 | |
| Electrical experimental record sheet for a P&R RRNII-4 battery, detailing its test history and mileage. | 20th Apr 1931 | Box 58 \ 3 Scan217 | |
| Electrical experimental record sheet for a P & R RRN11-6 Battery, tracking mileage and modifications. | 20th Apr 1931 | Box 58 \ 3 Scan218 | |
| Electrical experimental record sheet for a P+R RRNII-S battery. | 20th Apr 1931 | Box 58 \ 3 Scan219 | |
| Letter to be sent to the National Accumulator Co. Ltd. | 25th Jul 1931 | Box 58 \ 3 Scan220 | |
| Request to Chloride Electrical Storage Co. Ltd. for particulars of the new type XSM.7 battery. | 3rd Oct 1931 | Box 58 \ 3 Scan221 | |
| Letter from a supplier confirming the capacity and estimated weight of a new XSM7 battery for a 20/25-HP chassis. | 6th Oct 1931 | Box 58 \ 3 Scan222 | |
| Battery and battery box incompatibility for the last 50 'T' series chassis and recommending a new design. | 7th Oct 1931 | Box 58 \ 3 Scan223 | |
| The testing and recommended fitment of modified batteries for the last 50 T. Series chassis. | 9th Oct 1931 | Box 58 \ 3 Scan224 | |
| Sample battery from Peto and Radford for testing and fitting to a 20/25 HP chassis. | 23th Oct 1931 | Box 58 \ 3 Scan225 | |
| Cracked Exide battery lid, requesting a replacement and suggesting a design improvement for the screws. | 26th Oct 1931 | Box 58 \ 3 Scan226 | |
| Letter to The National Accumulator Ltd. regarding missing lead washers on a sample battery for a 20/25 HP chassis. | 26th Oct 1931 | Box 58 \ 3 Scan227 | |
| Letter from a supplier discussing the intentional omission of lead washers on a 20/25 HP chassis battery. | 30th Oct 1931 | Box 58 \ 3 Scan228 | |
| Letter to Peto & Radford concerning lead washers for the 20/25 HP Battery Type 6-TBS7-A. | 2nd Nov 1931 | Box 58 \ 3 Scan229 | |
| The omission of lead washers on a new type of P&R battery. | 2nd Nov 1931 | Box 58 \ 3 Scan230 | |
| Correspondence regarding the fitting of lead washers to various battery types. | 3rd Nov 1931 | Box 58 \ 3 Scan231 | |
| Letter to The Chloride Electrical Storage Co. Ltd. to arrange a meeting to discuss reducing battery costs. | 21th Dec 1931 | Box 58 \ 3 Scan232 | |
| Letter from The Chloride Electrical Storage Company regarding a scheme for battery interchangeability. | 31th Dec 1931 | Box 58 \ 3 Scan233 | |
| Letter from The Chloride Electrical Storage Company Limited regarding battery interchangeability and options for vehicles. | 6th Jan 1932 | Box 58 \ 3 Scan234 | |
| Page 2 of a letter from Chloride Electrical Storage Company regarding battery container materials and design. | 6th Jan 1932 | Box 58 \ 3 Scan235 | |
| Blueprint showing outline and dimensions for two battery types, for Ford Model A and Ford Model B. | 6th Jan 1932 | Box 58 \ 3 Scan236 | |
| Blueprint outline of a '3XR4-1H' Exide battery. | 31th Dec 1930 | Box 58 \ 3 Scan237 | |
| Blueprint showing the outline and dimensions of a special 3XR5-1H battery. | 8th Dec 1930 | Box 58 \ 3 Scan238 | |
| Letter to The Chloride Electrical Storage Co. Ltd. requesting a 3XC15 trial battery with robust elements. | 8th Jan 1932 | Box 58 \ 4 Scan001 | |
| Proposal to use a new standard Exide battery for the 40/50 chassis to reduce cost and improve serviceability. | 1st Jan 1932 | Box 58 \ 4 Scan002 | |
| Letter to battery supplier Peto & Radford Ltd. regarding the interchangeability and cost reduction of 40/50 2-unit batteries. | 8th Jan 1932 | Box 58 \ 4 Scan003 | |
| Letter regarding a preference for a 3 XC15 sized battery and the supply of a trial version. | 9th Jan 1932 | Box 58 \ 4 Scan004 | |
| Letter from Exide Batteries concerning the dispatch of a sample battery. | 11th Jan 1931 | Box 58 \ 4 Scan005 | |
| Letter to The Chloride Electrical Storage Co. Ltd. arranging a visit to witness a battery discharge test. | 12th Jan 1932 | Box 58 \ 4 Scan006 | |
| Letter from The Chloride Electrical Storage Company, Ltd. rearranging a visit by Mr. H.E. West. | 13th Jan 1932 | Box 58 \ 4 Scan007 | |
| Visit from Mr. Preston, detailing a suggested alternative battery from Peto & Radford. | 14th Jan 1932 | Box 58 \ 4 Scan008 | |
| Letter from a battery manufacturer concerning the production of a sample battery for a 40/50 chassis. | 14th Jan 1932 | Box 58 \ 4 Scan009 | |
| Letter to The Chloride Electrical Storage Co. Ltd. to arrange a visit for the 20th of the month. | 15th Jan 1932 | Box 58 \ 4 Scan010 | |
| Covering memo for an attached letter from Messrs. Peto & Radford regarding a universal interchangeable battery for the 40/50 chassis. | 5th Jan 1932 | Box 58 \ 4 Scan011 | |
| Testing of a new universal type interchangeable battery and potential modifications to existing batteries. | 5th Jan 1932 | Box 58 \ 4 Scan012 | |
| Development and testing of a new universal type battery with various suppliers. | 5th Jan 1932 | Box 58 \ 4 Scan013 | |
| Letter from The Chloride Electrical Storage Company arranging a car to collect a Mr. West for a works visit. | 18th Jan 1932 | Box 58 \ 4 Scan014 | |
| Letter to The Chloride Electrical Storage Co. Ltd. confirming travel arrangements for a works visit. | 19th Jan 1932 | Box 58 \ 4 Scan015 | |
| Comparison of specifications between a proposed and an existing battery for a 40/50 HP car. | 20th Jan 1932 | Box 58 \ 4 Scan016 | |
| Comparison of specifications for two proposed batteries and an existing battery for a 20/25 HP Car. | 20th Jan 1932 | Box 58 \ 4 Scan017 | |
| Letter to a supplier querying battery specifications, dimensions, and pricing. | 22th Jan 1932 | Box 58 \ 4 Scan018 | |
| Visit to the Chloride Electrical Storage Co. and the specifications for a new universal type battery for the 40/50 chassis. | 22th Jan 1932 | Box 58 \ 4 Scan019 | |
| Proposal for a universal battery for the 20/25 and Japan 3 chassis. | 22th Jan 1932 | Box 58 \ 4 Scan020 | |
| Letter from Exide Batteries concerning the cost of screwed terminals and battery container dimensions. | 25th Jan 1932 | Box 58 \ 4 Scan021 | |
| The procurement of a 40/50 universal type battery for testing on chassis 19-EX in France. | 25th Jan 1932 | Box 58 \ 4 Scan022 | |
| Letter from Exide Batteries regarding the cost difference between screwed terminals and taper pillars, and discussing battery container dimensions. | 25th Jan 1932 | Box 58 \ 4 Scan023 | |
| Terminal connector prices and dimensional discrepancies for a universal type battery. | 26th Jan 1932 | Box 58 \ 4 Scan024 | |
| Procurement of a two 6-volt unit battery from Chloride Co. for testing on the 20/25 model. | 26th Jan 1932 | Box 58 \ 4 Scan025 | |
| The ordering of 20/25 batteries up to the end of the 'U' series. | 26th Jan 1932 | Box 58 \ 4 Scan026 | |
| Request to obtain a universal type battery for examination and testing on a 20/25 and Japan 3 chassis. | 29th Jan 1932 | Box 58 \ 4 Scan027 | |
| Request to obtain an Exide universal type battery for examination and testing on the 20/25 and Japan 3 chassis. | 29th Jan 1932 | Box 58 \ 4 Scan028 | |
| Standard substitute for the 20/25HP battery, applicable to the J.III model, and improvements to the battery fixing system. | 29th Jan 1932 | Box 58 \ 4 Scan029 | |
| Letter to Peto & Radford to arrange a visit to inspect and discuss universal R.R. chassis batteries and a similar type for the 20/25 HP chassis. | 29th Jan 1932 | Box 58 \ 4 Scan030 | |
| Letter from Pritchett & Gold and E.P.S. Company regarding chassis batteries ready for testing. | 1st Feb 1932 | Box 58 \ 4 Scan031 | |
| New contract price for the 40/50-HP Universal Type Battery from Chloride Co. | 1st Feb 1932 | Box 58 \ 4 Scan032 | |
| Request to obtain 3 pairs of K type connectors for testing new universal type batteries. | 2nd Feb 1932 | Box 58 \ 4 Scan033 | |
| Use of universal batteries on 25HP & J.3 models, tray modifications, and lid requirements. | 2nd Feb 1932 | Box 58 \ 4 Scan034 | |
| Letter to Peto & Radford Ltd. regarding proposals and a meeting for Universal Type R.R. and 20/25 chassis batteries. | 4th Feb 1932 | Box 58 \ 4 Scan035 | |
| Letter from the National Accumulator Company regarding a works visit and the 20/25 chassis battery. | 5th Feb 1932 | Box 58 \ 4 Scan036 | |
| Particulars of proposed universal Exide batteries with dimensions for 40/50, 20/25, and J.3. models. | 5th Feb 1932 | Box 58 \ 4 Scan037 | |
| Requesting a new battery box for experimental car 27-EX to accommodate a new Exide battery. | 5th Feb 1932 | Box 58 \ 4 Scan038 | |
| Requesting a Universal Type 40/50 battery be fitted to chassis 27-EX for testing. | 5th Feb 1932 | Box 58 \ 4 Scan039 | |
| Introducing a proposed new universal type battery for the 20/25 and J.III chassis. | 1st Feb 1932 | Box 58 \ 4 Scan040 | |
| Comparison of specifications for a proposed accumulator and an existing accumulator. | 11th Feb 1932 | Box 58 \ 4 Scan041 | |
| Design of battery boxes and lids for the J. 3. & 25HP models. | 11th Feb 1932 | Box 58 \ 4 Scan042 | |
| Request to order a sample Peto & Radford 12 volt battery for testing on chassis 19-EX. | 12th Feb 1932 | Box 58 \ 4 Scan043 | |
| Request to The Chloride Electrical Storage Co Ltd. for outline drawings of batteries for 20/25 HP and 40/50 HP chassis. | 12th Feb 1932 | Box 58 \ 4 Scan044 | |
| Letter concerning high rate discharge tests and voltage comparisons between Exide and P&R batteries. | 12th Feb 1932 | Box 58 \ 4 Scan045 | |
| Graph showing the discharge curves for two proposed Phantom II batteries. | 12th Feb 1932 | Box 58 \ 4 Scan046 | |
| Letter to Messrs. Peto & Radford regarding a high-rate discharge test comparison between Exide and P & R batteries. | 12th Feb 1932 | Box 58 \ 4 Scan047 | |
| Graph showing the discharge curves of two proposed batteries for the Phantom II model. | 19th Feb 1932 | Box 58 \ 4 Scan048 | |
| Comparison of specifications for a proposed and an existing accumulator for the 40/50 HP model. | 19th Feb 1932 | Box 58 \ 4 Scan049 | |
| Letter from battery supplier Peto & Radford concerning tests and supply of new batteries for 40/50 HP and 20/25 HP cars. | 10th Feb 1932 | Box 58 \ 4 Scan050 | |
| Letter from Exide Batteries confirming the dispatch of drawings for new universal batteries for the 20/25 and 40/50 model chassis. | 15th Feb 1932 | Box 58 \ 4 Scan051 | |
| Visit to Peto & Radford Co. regarding the development and comparison of universal type batteries. | 5th Feb 1932 | Box 58 \ 4 Scan052 | |
| Universal batteries for 20/25 and J.III cars, discussing part numbers and the merits of different battery lid types. | 1st Feb 1932 | Box 58 \ 4 Scan053 | |
| Standardisation of an Exide battery type 6XSM7-IL for chassis parts. | 4th Jan 1932 | Box 58 \ 4 Scan054 | |
| Standardization of chassis parts form detailing the first chassis to receive a new part and the date of testing. | 10th Mar 1932 | Box 58 \ 4 Scan055 | |
| Letter from accumulator manufacturer Peto & Radford comparing the performance of their battery with a competitor's Exide battery. | 16th Feb 1932 | Box 58 \ 4 Scan056 | |
| Design considerations for J.3. and 25 HP batteries, focusing on lids and acid proofing. | 9th Feb 1932 | Box 58 \ 4 Scan057 | |
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