| Description | Date | Identifier | |
| Proposed universal battery not fitting the 20/25 HP chassis, requesting recommendations for a modified fixing. | 23th Feb 1932 | Box 58 \ 4 Scan058 | |
| Letter from Peto & Radford regarding the dispatch of two experimental 3-BDHL11-A batteries for a 40/50 Chassis. | 29th Feb 1932 | Box 58 \ 4 Scan059 | |
| Letter from Peto & Radford regarding obsolete celluloid discs and a new standardised 6-volt battery for the 20/25 HP car. | 8th Mar 1932 | Box 58 \ 4 Scan060 | |
| Letter from Peto and Radford proposing new universal type batteries for the 40/50 and 20/25 chassis. | 10th Mar 1932 | Box 58 \ 4 Scan061 | |
| Letter from Peto & Radford regarding drawings for new 'Universal' type batteries for the 40/50 and 20/25 chassis. | 10th Mar 1932 | Box 58 \ 4 Scan062 | |
| Confirming a request for a National Accumulator battery to be passed on upon arrival. | 22th Mar 1932 | Box 58 \ 4 Scan063 | |
| Letter from Peto & Radford concerning the dispatch of two 3BDHL7-A batteries for the 20/25 HP chassis. | 31th Mar 1932 | Box 58 \ 4 Scan064 | |
| Requesting an order for a sample universal type battery from the National Accumulator Co. for testing. | 2nd Apr 1932 | Box 58 \ 4 Scan065 | |
| Confirming a conversation about a scheme to test universal type batteries on the 20/25 and J.3 chassis. | 2nd Apr 1932 | Box 58 \ 4 Scan066 | |
| Sourcing of batteries from Exide and National Accumulator Co. for J.3, 25HP, and Peregrine models. | 12th Apr 1932 | Box 58 \ 4 Scan067 | |
| Request to arrange the fitting of a universal type Exide battery to a 25-EX chassis for a road test. | 5th Mar 1932 | Box 58 \ 4 Scan068 | |
| Requesting a scheme to try out universal type batteries on an experimental 20/25 chassis. | 11th May 1932 | Box 58 \ 4 Scan069 | |
| Instruction regarding the fitting of a Universal type battery and a new battery box for chassis 20-EX. | 24th May 1932 | Box 58 \ 4 Scan070 | |
| Letter from Exide Batteries detailing battery specifications and options for a Bentley Sports car. | 24th Aug 1932 | Box 58 \ 4 Scan071 | |
| Letter from Exide Batteries detailing specifications for modified and alternative car batteries. | 26th Aug 1932 | Box 58 \ 4 Scan072 | |
| Letter from a battery supplier discussing options and modifications for a Bentley Sports Chassis battery. | 26th Aug 1932 | Box 58 \ 4 Scan073 | |
| Continuation letter from the National Accumulator Company regarding ebonite and wood separator options for the Bentley Chassis. | 26th Aug 1932 | Box 58 \ 4 Scan074 | |
| Letter from the National Accumulator Company discussing battery specifications and alternatives for a sports engine. | 1st Sep 1932 | Box 58 \ 4 Scan075 | |
| Internal request to order a standard 20/25 HP chassis and battery for car GLN.60. | 1st Sep 1932 | Box 58 \ 4 Scan076 | |
| Alternative battery options and recommendations for the Peregrine model. | 9th Sep 1932 | Box 58 \ 4 Scan077 | |
| Battery options and their suitability for the Peregrine and Bensport chassis. | 2nd Sep 1932 | Box 58 \ 4 Scan078 | |
| Order for various Exide and Dagenite batteries for the 'Peregrine II' chassis. | 2nd Sep 1932 | Box 58 \ 4 Scan079 | |
| Letter to the National Accumulator Co. Ltd regarding Dagenite accumulators received for testing without charging instructions. | 13th Oct 1932 | Box 58 \ 4 Scan080 | |
| Letter from Peto & Radford providing accumulator charging rates for instruction labels. | 14th Oct 1932 | Box 58 \ 4 Scan081 | |
| Return of cracked Dagenite accumulators to the makers for repair. | 24th Oct 1932 | Box 58 \ 4 Scan082 | |
| Cracking issues found in G.E.C. battery containers and a preference for 'Dagenite' material. | 28th Oct 1932 | Box 58 \ 4 Scan083 | |
| Letter from The Chloride Electrical Storage Company regarding the materials used for battery containers. | 25th Oct 1932 | Box 58 \ 4 Scan084 | |
| Inquiry to Chloride Electrical Storage Co. Ltd. regarding the material composition of batteries. | 24th Oct 1932 | Box 58 \ 4 Scan085 | |
| Letter to Peto & Radford Ltd. regarding loose terminal lugs on batteries in an experimental chassis, which was resolved by tightening the gland nuts. | 28th Oct 1932 | Box 58 \ 4 Scan086 | |
| Letter detailing the results of a 20-hour rate discharge test on two Dagenite accumulators. | 11th Jan 1933 | Box 58 \ 4 Scan087 | |
| Letter to Messrs Peto & Radford Ltd regarding the availability of spare apparatus. | 18th Jan 1933 | Box 58 \ 4 Scan088 | |
| Letter from accumulator manufacturers Peto & Radford regarding Dagenite battery test results and capacity discrepancies. | 18th Jan 1933 | Box 58 \ 4 Scan089 | |
| Letter apologising for a mistake in battery type numbers in previous correspondence. | 20th Jan 1933 | Box 58 \ 4 Scan090 | |
| Letter from a battery supplier concerning battery failures and an order for experimental Bentley batteries. | 7th Feb 1933 | Box 58 \ 4 Scan091 | |
| Letter to a battery supplier regarding an order for Bentley chassis batteries. | 8th Feb 1933 | Box 58 \ 4 Scan092 | |
| Internal order for three Dagenite accumulators for an experimental chassis. | 10th Feb 1933 | Box 58 \ 4 Scan093 | |
| Alternative battery options to allow for modifications to the rear end of the Phantom II for increased passenger foot room. | 20th Mar 1933 | Box 58 \ 4 Scan094 | |
| Rejection of a standard battery for the Phantom II (40/50) model and requesting dimensions for a custom one. | 21th Mar 1933 | Box 58 \ 4 Scan095 | |
| Internal request to order one Exide battery type 6XSM7-1L. | 21th Apr 1933 | Box 58 \ 4 Scan096 | |
| Request to return a damaged Exide battery, type 6-XSM7-1L, for repair after its container was cracked on an experimental chassis. | 5th May 1933 | Box 58 \ 4 Scan097 | |
| Options for an experimental battery for N.Sch.3712, including modifications to plates and casing. | 15th May 1933 | Box 58 \ 4 Scan098 | |
| Battery selection and housing for an experimental car. | 25th May 1933 | Box 58 \ 4 Scan099 | |
| Battery housing, recommending against a wooden crate and suggesting two six-volt units for easier withdrawal. | 27th May 1933 | Box 58 \ 4 Scan100 | |
| Specifications and performance comparison of two types of Bentley batteries. | 20th Jun 1933 | Box 58 \ 4 Scan101 | |
| Summary of the reasons for deciding on the 9-plate battery for the Bentley. | 20th Jun 1933 | Box 58 \ 4 Scan102 | |
| Details, dimensions, and condition report for 9 and 11 plate Exide and Dagenite batteries. | 22th Oct 1933 | Box 58 \ 4 Scan103 | |
| Table comparing performance data and weights for different battery types. | 22th Oct 1933 | Box 58 \ 4 Scan104 | |
| The construction and components of a battery cell. | 22th Oct 1933 | Box 58 \ 4 Scan105 | |
| Specifications and dimensions for positive and negative plates. | 22th Jun 1933 | Box 58 \ 4 Scan106 | |
| With measurements for positive and negative battery plates. | 22th Jun 1933 | Box 58 \ 4 Scan107 | |
| Technical drawing of a ribbed wood separator used in the construction of Dagenite batteries. | 23th Jun 1933 | Box 58 \ 4 Scan108 | |
| Technical memorandum comparing the performance, weight, and capacity of Bensport batteries against standard and other models. | 23th Jun 1933 | Box 58 \ 4 Scan109 | |
| The choice of battery for the Bensport, comparing its performance to the standard 20/25 model. | 23th Jun 1933 | Box 58 \ 4 Scan110 | |
| Letter to Mr. E.C. McKinnon of The Chloride Elec. Storage Co. Ltd. requesting a meeting to discuss battery modifications for a 40/50 chassis and a new chassis design. | 1st Aug 1933 | Box 58 \ 4 Scan111 | |
| Urgent request to order a replacement Exide battery for an experimental Morris Cowley chassis. | 28th Aug 1933 | Box 58 \ 4 Scan112 | |
| Letter from a supplier regarding technical data and design specifications for a new battery. | 29th Aug 1933 | Box 58 \ 4 Scan113 | |
| Specification sheet detailing two proposed battery types with their dimensions, weight, and capacity. | 29th Aug 1933 | Box 58 \ 4 Scan114 | |
| Letter from The Chloride Electrical Storage Company Ltd., signed by the Chief Engineer, listing enclosures. | 1st Sep 1933 | Box 58 \ 4 Scan115 | |
| Letter to The Chloride Electrical Storage Co. Ltd. inquiring about an intermediate battery with specific capacity and weight requirements. | 1st Sep 1933 | Box 58 \ 4 Scan116 | |
| Letter from a battery supplier proposing an alternative battery specification. | 4th Sep 1933 | Box 58 \ 4 Scan117 | |
| Letter from Chloride Electrical Storage Company detailing battery specifications and alternatives. | 4th Sep 1933 | Box 58 \ 4 Scan118 | |
| Letter from a battery supplier comparing the specifications of two suggested battery types. | 4th Sep 1933 | Box 58 \ 4 Scan119 | |
| Letter from Dagenite Accumulators regarding efforts to reduce the weight of a Bentley battery cover and batteries for a special chassis. | 4th Sep 1933 | Box 58 \ 4 Scan120 | |
| Letter to A.O. Elliott regarding dynamo arrangements and voltage regulation. | 4th Sep 1933 | Box 58 \ 4 Scan121 | |
| Letter to the Chloride Electrical Storage Co. Ltd. requesting a dimensioned sketch and mud space specifications for a battery. | 5th Sep 1933 | Box 58 \ 4 Scan122 | |
| Letter from The Chloride Electrical Storage Company regarding battery specifications and an enclosed drawing. | 6th Sep 1933 | Box 58 \ 4 Scan123 | |
| Special battery for the Vulture chassis, attaching correspondence from the Chloride Electrical Storage Co. Ltd. | 7th Sep 1933 | Box 58 \ 4 Scan124 | |
| Letter to Chloride Electrical Storage Co. Ltd. regarding specifications for a Special Phantom II battery and enquiries about Bentley chassis batteries. | 12th Sep 1933 | Box 58 \ 4 Scan125 | |
| The guarantee for different thick plate batteries for the Bentley and 40/50 chassis. | 13th Sep 1933 | Box 58 \ 4 Scan126 | |
| Letter from Peto & Radford regarding the performance and potential supply of a Dagenite accumulator. | 13th Sep 1933 | Box 58 \ 4 Scan127 | |
| Letter requesting a sample 6.BGD11/SC battery for testing and a price comparison. | 15th Sep 1933 | Box 58 \ 4 Scan128 | |
| Letter from Chloride Electrical Storage Company discussing battery specifications for the Phantom II. | 15th Sep 1933 | Box 58 \ 4 Scan129 | |
| Letter from The Chloride Electrical Storage Company detailing the specifications for a 6-XHR11-LL battery. | 18th Sep 1933 | Box 58 \ 4 Scan130 | |
| Letter to a battery supplier requesting a dimensioned drawing, a sample for testing, and comparing battery life. | 18th Sep 1933 | Box 58 \ 4 Scan131 | |
| Letter from a battery supplier confirming they are preparing a 6BGD11-SC battery and requesting an official order. | 18th Sep 1933 | Box 58 \ 4 Scan132 | |
| Letter to Messrs. Pritchett & Gold and E.P.S., Co. Ltd. regarding an order for a special 6 BGD11-SC battery. | 19th Sep 1933 | Box 58 \ 4 Scan133 | |
| Order request for a special Phantom II battery from Messrs. Peto & Radford. | 19th Sep 1933 | Box 58 \ 4 Scan134 | |
| Letter from a battery supplier discussing a sample 6-XHR11-LL battery for testing and observations on dynamo control systems. | 20th Sep 1933 | Box 58 \ 4 Scan135 | |
| Letter from a supplier regarding battery life statistics for standard 40/50 and 20/25 batteries. | 20th Sep 1933 | Box 58 \ 4 Scan136 | |
| Letter from Pritchett & Gold regarding an order for a 6BGD11-SC battery, discussing pricing and alternative specifications. | 20th Sep 1933 | Box 58 \ 4 Scan137 | |
| Letter to a supplier regarding battery specifications for a Bentley chassis, specifically the container and holding down bolts. | 22th Sep 1933 | Box 58 \ 4 Scan138 | |
| Battery cell failure, its effect on charging, and voltage regulator performance. | 25th Sep 1933 | Box 58 \ 4 Scan139 | |
| Letter from The Chloride Electrical Storage Company discussing battery supply and arranging a meeting. | 25th Sep 1933 | Box 58 \ 4 Scan140 | |
| Use of alternative Bentley-type batteries for the 20/25 HP chassis. | 27th Sep 1933 | Box 58 \ 4 Scan141 | |
| Unsuitability of using a Bentley type battery on the 20/25 model with the current dynamo system. | 28th Sep 1933 | Box 58 \ 4 Scan142 | |
| From 'E' to 'ROY' regarding the change to Bentley-type batteries and dynamos for the 20/25 HP model. | 28th Sep 1933 | Box 58 \ 4 Scan143 | |
| Letter to Peto & Radford regarding a cracked sample battery container. | 29th Sep 1933 | Box 58 \ 4 Scan144 | |
| Letter from Peto & Radford regarding cracks on a 6-BDG11.SC battery container. | 2nd Oct 1933 | Box 58 \ 4 Scan145 | |
| Internal order request for spare parts for a Pritchett & Gold battery for the Experimental Electrical Laboratory. | 9th Oct 1933 | Box 58 \ 4 Scan146 | |
| Letter from Chloride Electrical Storage Company Ltd discussing a new battery type, metal inserts, and a proposed new vent plug design. | 12th Oct 1933 | Box 58 \ 4 Scan147 | |
| Letter from Chloride Electrical Storage Company regarding a new design for battery sample plugs. | 16th Oct 1933 | Box 58 \ 4 Scan148 | |
| Letter to The Chloride Electrical Storage Co. regarding feedback on a battery acid indicator and proposing collaboration on a new device. | 16th Oct 1933 | Box 58 \ 4 Scan149 | |
| Letter requesting confidential information regarding the performance of a new Alklum Battery. | 18th Oct 1933 | Box 58 \ 4 Scan150 | |
| Letter from a battery supplier regarding a device to measure electrolyte levels and the advantages of Alklum batteries. | 18th Oct 1933 | Box 58 \ 4 Scan151 | |
| Letter concerning the dispatch of a sample battery and a delay in providing sample vent plugs. | 26th Oct 1933 | Box 58 \ 4 Scan152 | |
| Inquiry regarding the features of a battery on chassis 27-EX and potential alternatives. | 9th Jan 1934 | Box 58 \ 4 Scan153 | |
| Technical note comparing the specifications and received condition of Dagenite and Exide batteries. | 16th Jan 1934 | Box 58 \ 4 Scan154 | |
| Note on recharging an Exide battery and conducting a capacity test on a Dagenite battery. | 16th Jan 1934 | Box 58 \ 4 Scan155 | |
| Urgent internal order for two standard 40/50 chassis batteries for experimental chassis 22-EX and 28-EX. | 16th Jan 1934 | Box 58 \ 4 Scan156 | |
| Letter requesting the specification and dimensioned drawing for an Exide battery. | 16th Jan 1934 | Box 58 \ 4 Scan157 | |
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