| Description | Date | Identifier | |
| Letter to Peto & Radford Ltd. concerning the replacement of a faulty battery. | 26th Oct 1939 | Box 164 \ 2 img019 | |
| Letter to Lucas Ltd. inquiring about a suitable switchbox and wiring harness. | 16th Nov 1939 | Box 164 \ 2 img021 | |
| Specification sheet detailing battery types, manufacturers, and weights for various models. | 18th Dec 1939 | Box 164 \ 2 img022 | |
| Specification sheet detailing battery types and weights for Silver Phantom and Silver Dawn models. | 18th Dec 1939 | Box 164 \ 2 img023 | |
| Electrical modifications for the Ripplet car, specifically earthing the battery and dynamo. | 2nd Feb 1940 | Box 164 \ 2 img024 | |
| Inspection and comparison of a salvaged German 'Varta' battery from a Heinkel bomber. | 29th Feb 1940 | Box 164 \ 2 img025 | |
| The production of experimental battery plates with reduced thickness. | 29th Feb 1940 | Box 164 \ 2 img026 | |
| Construction and performance characteristics of an accumulator, including a table of capacity figures. | 1st Mar 1940 | Box 164 \ 2 img027 | |
| Report on a German battery removed from a Heinkel Aircraft. | 1st Mar 1940 | Box 164 \ 2 img028 | |
| Requesting the replacement of worn-out car service batteries. | 1st Mar 1940 | Box 164 \ 2 img029 | |
| Requesting an order for replacement Bentley Dagenite and Wraith Exide batteries for service cars. | 1st Mar 1940 | Box 164 \ 2 img030 | |
| Incidents of the main battery lead shorting and a proposed alternative, safer position. | 1st Mar 1940 | Box 164 \ 2 img031 | |
| The main battery lead arrangement for the 10.B.V. model. | 4th Mar 1940 | Box 164 \ 2 img033 | |
| Requesting an order for battery clamp connectors from Messrs. Peto & Radford. | 6th Apr 1940 | Box 164 \ 2 img035 | |
| Request for a complete specification for a positive earth electrical installation on a left-hand drive car. | 22th Apr 1940 | Box 164 \ 2 img036 | |
| Blank data sheet from a car battery catalogue for export models. | 27th Apr 1940 | Box 164 \ 2 img038 | |
| Letter to London Battery & Cable Co. Ltd. declining to list their battery as an approved replacement part. | 27th Apr 1940 | Box 164 \ 2 img040 | |
| Temperature tests on four experimental layouts for the main battery cable. | 14th May 1940 | Box 164 \ 2 img042 | |
| Different schemes for shielding and cable routing within a vehicle frame. | 14th May 1940 | Box 164 \ 2 img043 | |
| Wiring diagram for a L.H. Silver Phantom with a Positive Earth to Battery configuration. | 14th May 1940 | Box 164 \ 2 img045 | |
| Comparative tests on Dagenite & Lucas batteries for a Bentley car. | 20th May 1940 | Box 164 \ 2 img046 | |
| Battery performance tests, comparing a standard battery with a Lucas battery under various conditions. | 20th May 1940 | Box 164 \ 2 img047 | |
| Comparative analysis of a standard battery versus a Lucas battery, detailing performance, capacity, and lifespan. | 20th May 1940 | Box 164 \ 2 img048 | |
| Inquiry sent to battery manufacturers regarding the specifications and availability of a 12-volt starter battery for an experimental unit. | 4th Jul 1940 | Box 164 \ 2 img049 | |
| Quotation letter from a battery supplier for a 12-volt starter battery. | 10th Jul 1940 | Box 164 \ 2 img050 | |
| Letter from accumulator manufacturer Peto & Radford acknowledging a letter and advising that battery tests are required. | 12th Jul 1940 | Box 164 \ 2 img051 | |
| Letter from Peto & Radford discussing the results of battery experiments, specifications, and pricing. | 29th Jul 1940 | Box 164 \ 2 img052 | |
| Request to A. Hulme & Son Ltd. for the supply of accumulators based on a verbal description, with an official order to follow. | 12th Aug 1940 | Box 164 \ 2 img053 | |
| The procurement of stock batteries. | 10th Sep 1940 | Box 164 \ 2 img054 | |
| Inquiry to Dagenite Co., Ltd. regarding the specifications of a battery and a potential lighter alternative. | 28th Oct 1940 | Box 164 \ 2 img055 | |
| Letter from Peto & Radford regarding a meeting about lighter batteries. | 1st Nov 1940 | Box 164 \ 2 img056 | |
| Letter to Peto & Radford detailing the results of a life test on a 6HZDS Dagenite battery for a Bentley engine. | 7th Nov 1940 | Box 164 \ 2 img057 | |
| Letter from a battery manufacturer regarding the development and testing of two sample batteries. | 9th Nov 1940 | Box 164 \ 2 img058 | |
| Letter from a battery supplier regarding starting current requirements, the preparation of sample batteries, and life test results. | 14th Nov 1940 | Box 164 \ 2 img059 | |
| Order for a carboy of distilled water for car battery maintenance at Clan Foundry. | 28th Dec 1940 | Box 164 \ 2 img060 | |
| Internal request to order two Dagonite car batteries from Clan Foundry, Belper. | 29th Jan 1941 | Box 164 \ 2 img061 | |
| Letter from Peto & Radford providing test results for a 6LZD9-S battery, including capacity, high rate discharge, and weight. | 10th Feb 1941 | Box 164 \ 2 img062 | |
| Letter to Peto & Radford regarding tests on a lighter 6LAD 9-S type battery. | 17th Feb 1941 | Box 164 \ 2 img063 | |
| Letter from Peto & Radford regarding the dispatch of a 6-LZD9-S battery for testing. | 19th Feb 1941 | Box 164 \ 2 img065 | |
| The adoption of code numbers for batteries as suggested by the manufacturer, Messrs. Peto & Radford. | 18th Feb 1941 | Box 164 \ 2 img066 | |
| Communication from Messrs. Peto & Radford pointing out an error in battery code numbers. | 20th Feb 1941 | Box 164 \ 2 img067 | |
| The return of incorrectly supplied batteries to the vendor Peto & Radford. | 11th Dec 1941 | Box 164 \ 2 img068 | |
| Internal order request for battery holding down bolts and nuts from Messrs. Peto & Radford. | 7th Jan 1942 | Box 164 \ 2 img069 | |
| Returning unsuitable thermometers from Peto & Radford for measuring accumulator temperatures and suggesting an alternative supplier. | 26th Jan 1942 | Box 164 \ 2 img070 | |
| Order for three 6TXVW-11 type batteries from Messrs Lucas Ltd. | 17th Feb 1942 | Box 164 \ 2 img071 | |
| Internal request to place an order for 12 6HZDGS type batteries from Messrs. Peto & Radford. | 21th Feb 1942 | Box 164 \ 2 img072 | |
| Order for six 6TXVW-11 type batteries from Messrs. Lucas. | 21th Feb 1942 | Box 164 \ 2 img073 | |
| Request to order three SLTW.13.E accumulators with specified dimensions from Joseph Lucas. | 7th Apr 1942 | Box 164 \ 2 img074 | |
| Letter from a battery manufacturer regarding the long-term performance of different battery plates in a Bentley car. | 22th May 1942 | Box 164 \ 2 img075 | |
| Letter from an accumulator manufacturer regarding the development of a custom smaller, lighter-weight battery. | 18th Jul 1941 | Box 164 \ 2 img076 | |
| Letter to Peto & Radford Ltd. requesting advice on the best method for storing car batteries. | 29th Jul 1942 | Box 164 \ 2 img077 | |
| Letter to Joseph Lucas Ltd. seeking advice on the best method for storing car batteries during the war. | 29th Jul 1942 | Box 164 \ 2 img079 | |
| Letter from Exide and Drydex Batteries regarding a leaflet on the laying up of car batteries. | 31th Jul 1942 | Box 164 \ 2 img080 | |
| Letter from Peto & Radford regarding instructions for storing batteries in a dry condition for the duration of the war. | 5th Aug 1942 | Box 164 \ 2 img081 | |
| Instructions on the methods for long-term storage of car batteries. | 5th Aug 1942 | Box 164 \ 2 img082 | |
| Method 111 describes the process of dismantling and drying-off a battery for long-term storage. | 6th Aug 1942 | Box 164 \ 2 img084 | |
| Letter to Exide & Drydex Batteries acknowledging receipt of their leaflet No. M.522. | 6th Aug 1942 | Box 164 \ 2 img085 | |
| Letter from Joseph Lucas Limited advising on the correct procedure for the long-term storage of batteries. | 7th Aug 1942 | Box 164 \ 2 img086 | |
| Letter from Joseph Lucas Limited with instructions on preparing a battery for service after storage. | 7th Aug 1942 | Box 164 \ 2 img087 | |
| Letter to Peto & Radford Ltd. concerning information on storing car batteries. | 10th Aug 1942 | Box 164 \ 2 img088 | |
| Letter to Joseph Lucas Ltd concerning the procedure for laying up and maintaining batteries. | 10th Aug 1942 | Box 164 \ 2 img089 | |
| Letter acknowledging the receipt of two special batteries and a schedule for testing. | 29th Aug 1941 | Box 164 \ 2 img090 | |
| Internal memorandum requesting the purchase of a 6-volt Dagenite car battery. | 21th Oct 1941 | Box 164 \ 2 img091 | |
| Correspondence regarding the return of a wrong type battery and dispatch of the correct type. | 25th Nov 1941 | Box 164 \ 2 img092 | |
| Letter to Messrs. Peto and Radford concerning the finalization and ordering of larger batteries for experimental cars. | 16th Feb 1937 | Box 164 \ 3 img000 | |
| Brief memo confirming a works visit and lunch arrangement for Mr Minchin and Preston. | 30th Jan 1937 | Box 164 \ 3 img001 | |
| Letter from Peto & Radford to Mr. West arranging a visit to Derby. | 1st Feb 1937 | Box 164 \ 3 img002 | |
| Letter from Peto & Radford concerning car battery catalogues and a specific battery for a Phantom III. | 6th Feb 1937 | Box 164 \ 3 img003 | |
| Letter from Alklum Storage Batteries regarding the comparative cost, weight, and lifespan of their alkaline batteries versus lead-acid types. | 11th Feb 1937 | Box 164 \ 3 img004 | |
| Letter declining a battery sample from Alklum Storage Batteries Ltd. due to high cost and performance requirements. | 9th Feb 1937 | Box 164 \ 3 img005 | |
| Continuation sheet of a letter from Alklum Storage Batteries Ltd. regarding a proposal for battery capacities and weights. | 17th Feb 1937 | Box 164 \ 3 img006 | |
| Secret memo regarding the arrangement of battery boxes and the ordering of batteries for the 2nd and 3rd Wraith cars. | 17th Feb 1937 | Box 164 \ 3 img007 | |
| Battery and battery box for the Wraith II model, including capacity issues and modifications. | 17th Feb 1937 | Box 164 \ 3 img008 | |
| Credit note from Peto & Radford for one returned case. | 17th Feb 1937 | Box 164 \ 3 img009 | |
| Letter from Alklum Storage Batteries Limited regarding their ALKLUM Steelblock battery and a potential trial. | 8th Feb 1937 | Box 164 \ 3 img010 | |
| Continuation of a letter from Alklum Storage Batteries requesting battery capacity and dimension requirements. | 18th Feb 1937 | Box 164 \ 3 img011 | |
| Unsatisfactory design and high cost of battery boxes, suggesting they be made externally. | 18th Feb 1937 | Box 164 \ 3 img012 | |
| Replying to a query about batteries, confirming they are now standard. | 23th Feb 1937 | Box 164 \ 3 img013 | |
| Letter to The Chloride Electrical Storage Co. Ltd. about a modified battery for the 25/30.HP chassis. | 15th Mar 1937 | Box 164 \ 3 img014 | |
| Laboratory tests determining the voltage of fully charged and discharged batteries. | 19th Mar 1937 | Box 164 \ 3 img015 | |
| Letter from a battery supplier proposing a meeting to discuss a modified battery for a 25/30-HP chassis. | 18th Mar 1937 | Box 164 \ 3 img016 | |
| Letter to The Chloride Electrical Storage Ltd confirming a visit for Tuesday 23rd. | 19th Mar 1937 | Box 164 \ 3 img017 | |
| Design of the Wraith battery box and issues with the chosen battery's terminal arrangement. | 19th Mar 1937 | Box 164 \ 3 img018 | |
| Letter to a supplier inquiring about the type number and features of a new battery for a 25/30 HP chassis. | 23th Mar 1937 | Box 164 \ 3 img019 | |
| Internal memorandum requesting the order of two Exide batteries for experiments on the Wraith. | 23th Mar 1937 | Box 164 \ 3 img020 | |
| Letter from accumulator manufacturer Peto & Radford clarifying that the 'Z' in a battery model number refers to the 'LZL' type plates used. | 24th Mar 1937 | Box 164 \ 3 img021 | |
| Letter to The Chloride Electrical Storage Co. Ltd. confirming the correctness of an enclosed list. | 25th Mar 1937 | Box 164 \ 3 img022 | |
| Letter from Alklum Storage Batteries regarding their Nickel Iron Tubular Positive battery for electric trucks. | 26th Apr 1937 | Box 164 \ 3 img023 | |
| Letter from Alklum Storage Batteries Ltd. regarding a leaflet for their Nickel Iron Tubular Positive battery. | 26th Apr 1937 | Box 164 \ 3 img024 | |
| Letter regarding photographs of a Dagenite battery fitted to a Phantom III chassis after crossing Africa. | 28th Apr 1937 | Box 164 \ 3 img025 | |
| Letter from Chloride Electrical Storage Company regarding Latex battery separators and the development of their own micro-porous separators. | 2nd Jun 1937 | Box 164 \ 3 img027 | |
| Letter from accumulator manufacturers Peto & Radford regarding their testing of latex and porous ebonite battery separators. | 3rd Jun 1937 | Box 164 \ 3 img028 | |
| Instructions for a new 'one-piece' folded battery box design for the Wraith III chassis. | 10th Jun 1937 | Box 164 \ 3 img029 | |
| Query regarding a cheaper alternative to lead coating battery boxes, suggesting metallisation. | 14th Jun 1937 | Box 164 \ 3 img030 | |
| Information sheet about 'Gold Seal' Electrolyte for batteries with lead plates. | 14th Jun 1937 | Box 164 \ 3 img031 | |
| The history and advantages of Gold Seal Electrolyte for lead accumulators. | 14th Jun 1937 | Box 164 \ 3 img032 | |
| List of claims and benefits for Gold Seal Electrolyte used in batteries. | 24th Jun 1937 | Box 164 \ 3 img033 | |
| Inquiry to Chloride Electrical Storage Ltd. regarding a new German 'Gold Seal Electrolyte'. | 24th Jun 1937 | Box 164 \ 3 img034 | |
| Letter from an electrical storage company discussing an investigation into a new 'Gold Seal' battery electrolyte. | 25th Jun 1937 | Box 164 \ 3 img035 | |
| Blueprint graph showing the typical continuous discharge curve for an STXR9A battery. | 2nd Jul 1937 | Box 164 \ 3 img036 | |
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