| Description | Date | Identifier | |
| Request to Peto & Radford Ltd. for a complete specification and dimensioned drawing of a 6BGD-11SC battery. | 16th Jan 1934 | Box 58 \ 4 Scan158 | |
| Exide battery equivalent for a Dagenite battery, including capacity and plate thickness. | 16th Jan 1934 | Box 58 \ 4 Scan159 | |
| Letter from The Chloride Electrical Storage Company acknowledging a previous letter and confirming a drawing and specification will be sent. | 17th Jan 1934 | Box 58 \ 4 Scan160 | |
| Letter from Peto & Radford regarding the dispatch of general assembly drawing No. A.2239 for a 6.BGD11/SC battery. | 17th Jan 1934 | Box 58 \ 4 Scan161 | |
| Order request for batteries for the Experimental 40/50 & Vulture Chassis. | 18th Jan 1934 | Box 58 \ 4 Scan162 | |
| The procurement of batteries for starting tests and a proposal for standardization on the 40/50 HP Chassis. | 18th Jan 1934 | Box 58 \ 4 Scan163 | |
| Letter from Chloride Electrical Storage Company sending two copies of drawing No. GD59039 for an Exide battery. | 19th Jan 1934 | Box 58 \ 4 Scan164 | |
| Layout blueprint for the 6-XHR11-1ML battery. | 3rd Jan 1934 | Box 58 \ 4 Scan165 | |
| Blueprint for an Exide 6-XHR11-1ML battery proposed for the 40/50 standard with voltage control. | 20th Jan 1934 | Box 58 \ 4 Scan166 | |
| Letter to Packard Motor Car Co. requesting information and a sample of a low-maintenance battery. | 28th Jan 1936 | Box 58 \ 4 Scan167 | |
| Request to order a Peto and Radford type 6BGD9-SG battery for Experimental Chassis 21G4. | 5th Feb 1934 | Box 58 \ 4 Scan168 | |
| Letter to Peto & Radford Co. Ltd. to arrange a meeting to discuss a new 40/50 HP battery. | 8th Feb 1934 | Box 58 \ 4 Scan169 | |
| Letter to Peto & Radford requesting a meeting to discuss future 40/50 chassis battery requirements. | 12th Feb 1934 | Box 58 \ 4 Scan170 | |
| Letter from Peto & Radford arranging a visit to discuss battery requirements for the 40/50 HP Chassis. | 13th Feb 1934 | Box 58 \ 4 Scan171 | |
| Letter to Mr. H.E. West confirming travel arrangements for a lunch meeting in Derby. | 17th Feb 1934 | Box 58 \ 4 Scan172 | |
| Internal request to order Blankol Oil for a Pritchett & Gould battery. | 23th Feb 1934 | Box 58 \ 4 Scan173 | |
| Letter from Peto & Radford regarding a mistaken identity of a G.E.C. battery container. | 6th Mar 1934 | Box 58 \ 4 Scan174 | |
| Letter from accumulator manufacturers Peto & Radford regarding a catalogue for civil aircraft accumulators. | 21th Mar 1934 | Box 58 \ 4 Scan175 | |
| Request to order two ebonite cell lids with stoppers for an Exide battery. | 22th Mar 1934 | Box 58 \ 4 Scan176 | |
| Letter from a battery supplier regarding an order and providing advice on filling procedures to prevent cracking. | 23th Mar 1934 | Box 58 \ 4 Scan177 | |
| Letter to supplier Peto & Radford regarding the specification and testing of new batteries with moulded ebonite containers. | 24th Mar 1934 | Box 58 \ 4 Scan178 | |
| Letter from accumulator manufacturer Peto & Radford regarding a battery name change and container supply. | 26th Mar 1934 | Box 58 \ 4 Scan179 | |
| Letter from accumulator manufacturers PETO & RADFORD concerning the provision of sample batteries. | 28th Mar 1934 | Box 58 \ 4 Scan180 | |
| Letter from Peto & Radford regarding a delay in supplying new battery samples for the 40/50 HP Chassis. | 22th May 1934 | Box 58 \ 4 Scan181 | |
| Letter to Messrs. Peto & Radford Ltd. regarding P.& R. batteries and their containers. | 23th May 1934 | Box 58 \ 4 Scan182 | |
| Requesting an order for two new 40/50 batteries from different suppliers. | 30th May 1934 | Box 58 \ 4 Scan183 | |
| Proposed battery change for the 40/50 HP chassis, noting an assurance and payment made to the supplier. | 23th Jul 1934 | Box 58 \ 4 Scan184 | |
| Parts for a new battery box and suspension for a 40/50 HP Chassis under N.Scheme 4114. | 25th Jul 1934 | Box 58 \ 4 Scan185 | |
| Internal request to order a standard Bentley Peto & Radford 12 volt battery for Experimental Chassis 5.B. IV. | 11th Sep 1934 | Box 58 \ 4 Scan186 | |
| Standardisation of Exide and Peto & Radford 'Dagenite' batteries to facilitate service and reduce cost. | 27th Jun 1934 | Box 58 \ 4 Scan187 | |
| Instruction for the 'G.2' series aimed at avoiding scrap, noting that the cost of tools in the works is not affected. | 26th Sep 1934 | Box 58 \ 4 Scan188 | |
| The standardization of the battery box and suspension for the 20/25 HP chassis. | 26th Sep 1934 | Box 58 \ 4 Scan189 | |
| Internal request to order battery bolts, nuts, and washers for a standard Bentley 'Dagenite' battery. | 5th Oct 1934 | Box 58 \ 4 Scan190 | |
| Order for two standard Bentley chassis batteries from the Chloride Electrical Storage Co. Ltd. | 8th Oct 1934 | Box 58 \ 4 Scan191 | |
| Technical bulletin regarding a new regulator for Bentley chassis to address issues with discharged batteries. | 6th Dec 1934 | Box 58 \ 4 Scan192 | |
| Difficulty with batteries running down on Bentley chassis and the introduction of a new regulator/controller. | 7th Dec 1934 | Box 58 \ 4 Scan193 | |
| Issue with Bentley batteries running down and ordering replacement controllers. | 12th Dec 1934 | Box 58 \ 4 Scan194 | |
| Causes of battery discharge on Bentley chassis, differentiating between high-speed and city driving conditions. | 10th Dec 1934 | Box 58 \ 4 Scan195 | |
| Agreeing to prepare modified dynamos to address battery discharge complaints on Bentley chassis. | 14th Dec 1934 | Box 58 \ 4 Scan196 | |
| Modifying dynamos to address battery discharge issues on Bentley chassis. | 18th Dec 1934 | Box 58 \ 4 Scan197 | |
| Proposal to standardise the Bentley Type Battery for the 20/25-HP Chassis. | 27th Dec 1934 | Box 58 \ 4 Scan198 | |
| Letter from Peto & Radford discussing battery standardisation for the 20/25-HP chassis. | 21th Dec 1934 | Box 58 \ 4 Scan199 | |
| Battery capacity and suggesting a larger battery for Bentley, 20/25, and Wraith chassis. | 28th Dec 1934 | Box 58 \ 4 Scan200 | |
| Notice about a new voltage regulator (type B2CJ1) available for Bentley chassis to address discharged battery issues. | 28th Dec 1934 | Box 58 \ 4 Scan201 | |
| Discharged batteries on Bentley chassis, investigating issues with the dynamo and regulator. | 1st Jan 1935 | Box 58 \ 4 Scan202 | |
| Performance comparison of a new dynamo against a standard one, including bench test figures for heating, speed, and sparking. | 1st Jan 1935 | Box 58 \ 4 Scan203 | |
| Undercharging issues with batteries on Bentley cars and the testing of a new armature. | 4th Jan 1935 | Box 58 \ 4 Scan204 | |
| Discharge of batteries on Bentley cars and the preparation of new dynamos. | 9th Jan 1935 | Box 58 \ 4 Scan205 | |
| Letter to Peto & Radford regarding the standardisation of a Bentley Type Battery for 20/25-HP cars. | 10th Jan 1935 | Box 58 \ 4 Scan206 | |
| Letter from Peto & Radford regarding a discussion about using a Bentley battery on the 20/25 model. | 10th Jan 1935 | Box 58 \ 4 Scan207 | |
| Letter to Mr. Minchin of Messrs. Peto & Radford confirming arrangements for a meeting. | 14th Jan 1935 | Box 58 \ 4 Scan208 | |
| Standardisation of Bentley Type batteries for 20/25-HP cars and future ordering schedules. | 16th Jan 1935 | Box 58 \ 4 Scan209 | |
| Letter from The Chloride Electrical Storage Company Ltd regarding battery covers, cable slots, and capacity for Bentley and 20/25-HP cars. | 8th Jan 1935 | Box 58 \ 4 Scan210 | |
| Follow-up request for a reply concerning the discharge of batteries on Bentley cars. | 16th Jan 1935 | Box 58 \ 4 Scan211 | |
| Letter from accumulator manufacturer Peto & Radford regarding battery capacity discrepancies and suggestions for a replacement. | 17th Jan 1935 | Box 58 \ 4 Scan212 | |
| Letter from Peto & Radford comparing car battery capacities across different makes and suggesting a meeting. | 17th Jan 1935 | Box 58 \ 4 Scan213 | |
| Production and delivery schedule for modified dynamos to fix battery discharge issues on Bentley cars. | 17th Jan 1935 | Box 58 \ 4 Scan214 | |
| Letter from Peto & Radford to H.E. West arranging a lunch meeting in Derby. | 17th Jan 1935 | Box 58 \ 4 Scan215 | |
| Letter from The Chloride Electrical Storage Company Ltd. detailing battery capacities for Bentley and 20/25-HP models. | 18th Jan 1935 | Box 58 \ 4 Scan216 | |
| Cover note attaching a letter from Messrs. Chloride Electrical Storage Co. regarding a previous correspondence. | 19th Jan 1935 | Box 58 \ 4 Scan217 | |
| Letter from an accumulator manufacturer proposing a change to the cell lid design for the Bentley battery to prevent acid leakage. | 18th Feb 1935 | Box 58 \ 4 Scan218 | |
| Letter to Peto & Radford Ltd. regarding a proposal for 20/25, Bentley, and 40/50HP batteries. | 20th Feb 1935 | Box 58 \ 4 Scan219 | |
| Letter from accumulator manufacturers Peto & Radford proposing battery testing methods. | 21th Feb 1935 | Box 58 \ 4 Scan220 | |
| Letter from a battery manufacturer regarding a design alteration for Bentley and 20/25 HP models and an update to instruction booklets. | 25th Feb 1935 | Box 58 \ 4 Scan221 | |
| Letter to Messrs. Peto & Radford regarding an alteration to a battery type number and updating their address. | 27th Feb 1935 | Box 58 \ 4 Scan222 | |
| Letter requesting a Dagenite battery for Mr. E.R. Hall's Bentley for the Ulster T.T. race. | 15th Aug 1935 | Box 58 \ 4 Scan223 | |
| Letter from Peto & Radford concerning the supply of a Dagenite accumulator battery for Mr. Hall's racing Bentley. | 17th Aug 1935 | Box 58 \ 4 Scan224 | |
| Letter from Peto & Radford providing feedback on the ideal charging rates of present dynamos and the positive impact on battery longevity. | 27th Aug 1935 | Box 58 \ 4 Scan225 | |
| Letter regarding the dispatch of a battery for Mr. Hall's Bentley car. | 26th Aug 1935 | Box 58 \ 4 Scan226 | |
| Letter from Peto & Radford confirming the despatch of a battery for Mr. Hall's Bentley Car. | 27th Aug 1935 | Box 58 \ 4 Scan227 | |
| Letter from accumulator manufacturer Peto & Radford about a visit to discuss a sample car battery with an aircraft filling device. | 6th Dec 1935 | Box 58 \ 4 Scan228 | |
| Letter from accumulator manufacturer Peto & Radford discussing options for a lighter battery for a Bentley chassis. | 18th Dec 1935 | Box 58 \ 4 Scan229 | |
| Letter from Peto & Radford discussing battery life, cost, weight savings, and cover options for Bentley cars. | 18th Dec 1935 | Box 58 \ 4 Scan230 | |
| Letter from a supplier discussing alternative car battery specifications, options, and supply. | 18th Dec 1935 | Box 58 \ 4 Scan231 | |
| Comparison of specifications for three different lighter batteries available for Bentley vehicles. | 10th Jan 1936 | Box 58 \ 4 Scan232 | |
| Requesting the return of an experimental Phantom III battery to its manufacturer for modification. | 10th Jan 1936 | Box 58 \ 4 Scan233 | |
| Letter from Everett's Holdings acknowledging an order for replating an experimental Dagenite Battery. | 10th Jan 1936 | Box 58 \ 4 Scan234 | |
| Request to order two type 6 HZD9-S batteries for an experimental Bentley of reduced weight. | 10th Jan 1936 | Box 58 \ 4 Scan235 | |
| Letter from The Chloride Electrical Storage Company confirming a meeting to discuss batteries for Phantom III cars. | 21th Jan 1936 | Box 58 \ 4 Scan236 | |
| Letter from accumulator manufacturers Peto & Radford concerning special batteries for the 'Phantom III' and Bentley cars. | 22th Jan 1936 | Box 58 \ 4 Scan237 | |
| Letter from Peto & Radford advising against fitting a specific battery to a 'Phantom III' due to its reduced capacity and shortened life. | 22th Jan 1936 | Box 58 \ 4 Scan238 | |
| Comparison table of specifications for three different types of batteries. | 22th Jan 1936 | Box 58 \ 4 Scan239 | |
| Order for low internal resistance batteries for Phantom III and 25/30 chassis. | 23th Jan 1936 | Box 58 \ 4 Scan240 | |
| Letter to a supplier discussing battery specifications and modifications for various car chassis. | 24th Jan 1936 | Box 58 \ 4 Scan241 | |
| Statement about not wishing to fit a Bentley with a battery that has more overall resistance than the existing one. | 29th Jan 1936 | Box 58 \ 4 Scan242 | |
| Letter from accumulator manufacturers Peto & Radford regarding batteries for the Phantom III and Bentley. | 29th Jan 1936 | Box 58 \ 4 Scan243 | |
| Letter from accumulator manufacturer Peto & Radford discussing sample battery plates for Bentley and Rolls Royce types. | 7th Feb 1936 | Box 58 \ 4 Scan244 | |
| Letter from Peto & Radford regarding a delay in delivering accumulators (order No.98876) due to re-design work. | 11th Feb 1936 | Box 58 \ 4 Scan245 | |
| Proposal to adopt thin-plate batteries for RR and Bentley chassis, requesting samples from suppliers for testing. | 10th Mar 1936 | Box 58 \ 4 Scan246 | |
| Letter discussing the performance of American 'Prestolite' and Reading Aero batteries. | 25th Mar 1936 | Box 58 \ 4 Scan247 | |
| Arranging the return of a faulty Bentley Type Dagenite battery to Peto & Radford Co. for maker's inspection. | 3rd Apr 1936 | Box 58 \ 4 Scan248 | |
| Letter from accumulator manufacturer Peto & Radford regarding a quote for a 6.HZD.13-S battery for the Phantom III. | 6th Apr 1936 | Box 58 \ 4 Scan249 | |
| Letter to Messrs. Peto & Radford Ltd. regarding the production timeline for a new battery. | 7th Apr 1936 | Box 58 \ 4 Scan250 | |
| Cracked battery container caused by fitters over-tightening the nuts. | 17th Apr 1936 | Box 58 \ 4 Scan251 | |
| The allocation of experimental thin plate batteries from various suppliers for testing. | 17th Apr 1936 | Box 58 \ 4 Scan252 | |
| The order of a Peto & Radford 'Dagenite' accumulator for experimental thin plate batteries. | 17th Apr 1936 | Box 58 \ 4 Scan253 | |
| Proposal and testing of thin plate batteries before standardisation. | 18th Apr 1936 | Box 58 \ 4 Scan254 | |
| Arguing against reverting to thick plate batteries for the Phantom III, citing benefits of thin plate batteries for cold starting. | 21th Apr 1936 | Box 58 \ 4 Scan255 | |
| Concerns about the suitability of thin plate batteries for the Phantom III and the battery policy for Bentley/25/30 models. | 22th Apr 1936 | Box 58 \ 4 Scan256 | |
| Proposal to use thin plate batteries, their performance benefits, and associated considerations. | 22th Apr 1936 | Box 58 \ 4 Scan257 | |
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