| Description | Date | Identifier | |
| 20 HP and 40/50 HP battery specifications, and the need to decide on battery terminals. | 30th Jul 1924 | Box 54 \ 2 Scan038 | |
| Letter from The Chloride Electrical Storage Co. Ltd. discussing battery specifications for a 40/50 HP Chassis. | 29th Jul 1924 | Box 54 \ 2 Scan039 | |
| Letter from The Chloride Elec. Storage Co. Ltd. discussing battery construction and protection from acid. | 11th Aug 1924 | Box 54 \ 2 Scan040 | |
| Specifications for 20 HP and 40/50 HP chassis accumulators and related correspondence. | 11th Aug 1924 | Box 54 \ 2 Scan041 | |
| Specification and performance testing of a 40/50 HP chassis battery. | 12th Aug 1924 | Box 54 \ 2 Scan042 | |
| And responding to clauses regarding battery and generator specifications. | 12th Aug 1924 | Box 54 \ 2 Scan043 | |
| Continued discussion on battery specifications, referencing clauses and queries for Messrs. P & R. | 12th Aug 1924 | Box 54 \ 2 Scan044 | |
| Salient points of the 40/50 battery specification number 801. | 23th Sep 1924 | Box 54 \ 2 Scan045 | |
| Comparison of different car batteries, including models from Fullers and Exide, and their suitability for a standard battery box. | 11th Oct 1924 | Box 54 \ 2 Scan046 | |
| Comparison of various battery types, detailing their discharge curves, capacity results and weights. | 17th Oct 1924 | Box 54 \ 2 Scan047 | |
| Revision to the 40/50 Battery Specification No. 301. | 27th Oct 1924 | Box 54 \ 2 Scan048 | |
| Amendment to Specification 301 for the 40/50 HP battery's sealing compound, including supplier feedback. | 18th Nov 1924 | Box 54 \ 2 Scan049 | |
| Specification 301 for the 40/50 HP battery, discussing sealing compound and temperature limits. | 19th Nov 1924 | Box 54 \ 2 Scan050 | |
| Price list for P & R Standard and Exide batteries for 40/50 and 20 HP models. | 10th Dec 1924 | Box 54 \ 2 Scan051 | |
| Description of the 12-volt electrical system, accumulator reliability, and the prevention of battery undercharging. | 9th Apr 1925 | Box 54 \ 2 Scan052 | |
| Adoption of 'burnt-up' battery connections for the 40/50 HP model. | 4th May 1925 | Box 54 \ 2 Scan053 | |
| Inquiry to Chloride Electrical Storage Co. Ltd. regarding a preference for burnt-up versus bolted-up battery cell connections. | 5th May 1925 | Box 54 \ 2 Scan054 | |
| Forwarding a letter from The Chloride Electrical Storage Co. Ltd. about 40/50 HP batteries. | 11th May 1925 | Box 54 \ 2 Scan055 | |
| Letter from a battery supplier discussing the pros and cons of burned-up versus bolted battery connections. | 8th May 1925 | Box 54 \ 2 Scan056 | |
| Letter from The Chloride Electrical Storage Company Ltd. discussing bolted versus burned battery connections. | 12th May 1925 | Box 54 \ 2 Scan057 | |
| And deciding on the type of battery connections for the 40/50 HP car. | 12th May 1925 | Box 54 \ 2 Scan058 | |
| 40/50 HP batteries, sent in response to a previous query. | 13th May 1925 | Box 54 \ 2 Scan059 | |
| Requesting an order for P & R and Exide 40/50 batteries for several experimental cars. | 5th Jun 1925 | Box 54 \ 2 Scan060 | |
| The current prices for Exide and P&R chassis batteries. | 26th Jun 1925 | Box 54 \ 2 Scan061 | |
| And suggesting the actual battery capacities for 40/50 HP and 20 HP chassis. | 10th Aug 1925 | Box 54 \ 2 Scan062 | |
| Request for information on the life of P & R and Exbde batteries for Silver Ghost & 20 HP cars. | 11th Nov 1925 | Box 54 \ 2 Scan063 | |
| Battery service, listing battery makes for different chassis and investigating recent customer complaints. | 11th Nov 1925 | Box 54 \ 2 Scan064 | |
| Various instances of battery failures and defects on different chassis. | 16th Nov 1925 | Box 54 \ 2 Scan065 | |
| Clarifying interest is only in failures of current standard batteries for the 40/50 and 20 HP models. | 16th Nov 1925 | Box 54 \ 2 Scan066 | |
| List of battery types for 40/50 HP and 20 HP car models. | 16th Nov 1925 | Box 54 \ 2 Scan067 | |
| Report comparing the low rate discharge capacity and weight of various batteries including Exide, Fuller, and Oldham models. | 30th Nov 1925 | Box 54 \ 2 Scan068 | |
| Report comparing the performance of Fuller, Oldham, Exide, and P&R batteries based on discharge capacity tests. | 30th Nov 1925 | Box 54 \ 2 Scan069 | |
| The cell composition and testing status of various battery types. | 30th Nov 1925 | Box 54 \ 2 Scan070 | |
| Reports of battery failures on 40/50 & 20 HP models and a proposal to reduce generator output. | 24th Nov 1925 | Box 54 \ 2 Scan071 | |
| Battery charging resistances and adjusting the control brush angle. | 24th Nov 1925 | Box 54 \ 2 Scan072 | |
| Reports of battery failures, dynamo current, and proposed replacement procedures. | 25th Nov 1925 | Box 54 \ 2 Scan073 | |
| Dates of first fitting for standard batteries to 40/50 and 20 HP chassis. | 26th Nov 1925 | Box 54 \ 2 Scan074 | |
| Instructions for a comparison test on charging 40/50 batteries to find the effects of increased internal resistance. | 1st Dec 1925 | Box 54 \ 2 Scan075 | |
| Instructions for testing a dynamo and battery to reach steady conditions. | 29th Jun 1920 | Box 54 \ 2 Scan076 | |
| Test log sheet for battery cell, dynamo, and battery voltage readings. | 29th Jun 1930 | Box 54 \ 2 Scan077 | |
| Instruction sheet detailing the cell composition of five 'sandwich type' batteries and observations on charging an Exide SPL.1 battery. | 29th Jun 1920 | Box 54 \ 2 Scan078 | |
| Test results comparing the voltage rise and dynamo output of various battery cells. | 29th Jun 1920 | Box 54 \ 2 Scan079 | |
| Letter from a battery manufacturer discussing charging rates, generator output, and cell materials. | 18th Dec 1925 | Box 54 \ 2 Scan080 | |
| Test results for a Dynamo OA (Amended), showing cell voltages and peak outputs when run on various batteries with chassis wires. | 5th Dec 1925 | Box 54 \ 2 Scan081 | |
| Comparing the performance of an Exide 6RR5 battery and a P & R RR.11 battery on a 40/50 Chassis. | 24th Mar 1926 | Box 54 \ 2 Scan082 | |
| The condition of batteries upon opening, noting their concurrent failure points and ongoing comparative tests. | 24th Mar 1926 | Box 54 \ 2 Scan083 | |
| Comparison of the general behaviour of P & R RRI1-1 and Exide 6RR5-2 40/50 HP standard batteries. | 17th Mar 1926 | Box 54 \ 2 Scan084 | |
| The life testing and condition analysis of P & R and Exide batteries following bench and road use. | 17th Mar 1926 | Box 54 \ 2 Scan085 | |
| The condition of cells and plates, noting corrosion, cracking, and damage to various components. | 17th Mar 1926 | Box 54 \ 2 Scan086 | |
| The condition of Exide batteries after testing, comparing them to P & R batteries. | 17th Mar 1926 | Box 54 \ 2 Scan087 | |
| Hand-drawn bar chart comparing the mileage performance of EXIDE and P&R batteries on a chassis before failure. | 4th May 1926 | Box 54 \ 2 Scan088 | |
| Phantom accumulator, proposing a two-unit 6-volt battery system and comparing battery brands. | 4th May 1926 | Box 54 \ 2 Scan089 | |
| Experiments on the Phantom battery, including different separators and configurations. | 28th May 1926 | Box 54 \ 2 Scan090 | |
| Problems of battery over-charging and proposing an automatic voltage-operated cutout. | 9th Jun 1926 | Box 54 \ 2 Scan091 | |
| Customer's battery overcharging issues and the urgent proposal to add a charge indicator to the instrument board. | 28th Jun 1926 | Box 54 \ 2 Scan092 | |
| Battery design, recommending more space above the plates to prevent flooding. | 28th Jun 1926 | Box 54 \ 2 Scan093 | |
| Reduction of charging terminal potential for Exide batteries. | 21th Jun 1926 | Box 54 \ 2 Scan094 | |
| Results of charging Potential Difference and Electromotive Force tests on six chassis batteries. | 26th Jun 1926 | Box 54 \ 2 Scan095 | |
| Battery charging characteristics, internal resistance, and generator output control. | 26th Jun 1926 | Box 54 \ 2 Scan096 | |
| Battery charging characteristics, electromotive force, and external dynamo control. | 26th Jun 1926 | Box 54 \ 2 Scan097 | |
| Proposal for an experiment to test charge a battery using an invariable external resistance and sustained voltage. | 26th Jun 1926 | Box 54 \ 2 Scan098 | |
| Series of six graphs showing voltage vs. amperage curves for different electrical cut-outs and batteries. | 22th Jun 1926 | Box 54 \ 2 Scan099 | |
| Experiment on battery charging characteristics. | 15th Jul 1926 | Box 54 \ 2 Scan100 | |
| Instruction sheet detailing battery charging and discharging test results. | 8th Dec 1924 | Box 54 \ 2 Scan101 | |
| Instructions detailing a series of battery charge and discharge tests, noting a fault with cell number 3. | 8th Dec 1924 | Box 54 \ 2 Scan102 | |
| Instructions and observations regarding a cell charging test. | 9th Jul 1926 | Box 54 \ 2 Scan103 | |
| Wire confirmation from Royce to Hives requesting a twelve-volt battery. | 14th Aug 1926 | Box 54 \ 2 Scan104 | |
| The incorrect and dangerous installation of battery cables on chassis using coachbuilder-made battery boxes. | 20th Oct 1926 | Box 54 \ 2 Scan105 | |
| Continued page of a document describing a battery maintenance procedure. | 10th Jan 1927 | Box 54 \ 2 Scan106 | |
| Experiments on charging batteries to the characteristic V = 17 - .25 A. | 10th Jan 1927 | Box 54 \ 2 Scan107 | |
| The performance tests of various battery types, detailing charging and discharging characteristics. | 10th Jan 1927 | Box 54 \ 2 Scan108 | |
| Battery charging characteristics and discharge capacity measurements. | 26th Feb 1927 | Box 54 \ 2 Scan109 | |
| The low and high rate discharge curves of Exide and P & R batteries for the 40/50 HP chassis after extensive testing. | 26th Feb 1927 | Box 54 \ 2 Scan110 | |
| Performance of alternative 12-volt batteries against the standard battery. | 26th Feb 1927 | Box 54 \ 2 Scan111 | |
| Bench tests for an S2 battery (155) removed from chassis 8-EX after 13,377 miles. | 16th Feb 1927 | Box 54 \ 2 Scan112 | |
| The road and bench test results for a BX battery (159). | 24th Feb 1927 | Box 54 \ 2 Scan113 | |
| Graph plotting electrical performance data from a test conducted after 13,377 miles. | 15th Feb 1927 | Box 54 \ 2 Scan114 | |
| Chart showing electrical performance data recorded after a mileage test. | 21th Feb 1927 | Box 54 \ 2 Scan115 | |
| Graph showing continuous high rate discharge curves for chassis batteries 155 and 159. | 10th Feb 1927 | Box 54 \ 2 Scan116 | |
| Comparing the longevity, durability, and repair costs of different car batteries. | 1st Jun 1927 | Box 54 \ 2 Scan117 | |
| Letter to a battery supplier inquiring about modifications and discussing the results of comparative life tests on 'sandwich' batteries. | 4th Oct 1927 | Box 54 \ 2 Scan118 | |
| Letter discussing the expected failure timeline and inspection of batteries. | 10th Oct 1927 | Box 54 \ 2 Scan119 | |
| Experiments for charging a standard battery to a specific charging characteristic. | 10th Oct 1927 | Box 54 \ 2 Scan120 | |
| Conclusion on battery charging for regulator-controlled or auto-switch systems where the maximum voltage reaches 16.0. | 10th Oct 1927 | Box 54 \ 2 Scan121 | |
| Battery charging tests using a modified characteristic of V = 16 - .15 A. | 18th Jul 1927 | Box 54 \ 2 Scan122 | |
| Improvements to vehicle batteries and lighting systems for parking. | 11th Oct 1927 | Box 54 \ 2 Scan123 | |
| Graph showing battery terminal voltage drop over time for various tests on a Continental Phantom III chassis. | 1st Jan 1938 | Box 54 \ 2 Scan124 | |
| Letter to supplier Peto & Radford concerning issues with battery vent plugs on 40/50 HP cars. | 5th Jul 1928 | Box 54 \ 2 Scan125 | |
| The failure of P&R cells in 40/50 type Sandwich and 20 HP batteries, including life test results. | 5th Jul 1928 | Box 54 \ 2 Scan126 | |
| Observations on battery cell failures and the history of a 20 HP battery life test. | 27th Jun 1928 | Box 54 \ 2 Scan127 | |
| Analysis of P & R battery cell failure due to shorting, with a suggested design improvement for the separators. | 27th Jun 1928 | Box 54 \ 2 Scan128 | |
| The failure of a battery cell due to shorting. | 4th Jul 1928 | Box 54 \ 2 Scan129 | |
| Graphical log from a continuous current battery charging test for an 'Exide TR' battery. | 6th Jul 1926 | Box 54 \ 2 Scan130 | |
| Battery charging test chart for an Exide TR battery, recording amperes over time. | 8th Jul 1926 | Box 54 \ 2 Scan131 | |
| Chart recording the electrical characteristics of an Exide TR battery during a charging test. | 9th Jul 1926 | Box 54 \ 2 Scan132 | |
| Chart recording the test results of an Exide TR battery charge. | 14th Jul 1926 | Box 54 \ 2 Scan133 | |
| Graphical record of an electrical accumulator discharge test. | 1st Jul 1926 | Box 54 \ 2 Scan134 | |
| Battery charging performance test chart recorded on 'Megger' graph paper. | 3rd Jul 1926 | Box 54 \ 2 Scan135 | |
| Letter regarding battery design for a 40/50 HP chassis, discussing the use of bolted connections over burned-up ones. | 8th Feb 1924 | Box 54 \ 2 Scan136 | |
| Supply and dimensions of batteries for the 40/50 HP Chassis. | 3rd Mar 1924 | Box 54 \ 2 Scan137 | |
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