| Description | Date | Identifier | |
| Arranging for a 40/50 HP 12-volt battery to be handed over from the Stores to the Experimental Department. | 2nd Sep 1931 | Box 168b \ 3 img111 | |
| List of proposed modifications regarding handle slots, lid securing, cell lid glands and cell connections. | 28th Jun 1926 | Box 168b \ 3 img112 | |
| Recommendation to increase the space above the battery plates to prevent liquid from flooding the vent plugs. | 28th Jun 1926 | Box 168b \ 3 img113 | |
| Sourcing and designing the installation of Dagonite and Exide batteries in a vehicle frame. | 15th Sep 1926 | Box 168b \ 3 img114 | |
| Cost and experimental alternatives for special battery moulds. | 20th Oct 1926 | Box 168b \ 3 img115 | |
| Use of standard Peto & Radford battery mouldings instead of producing new ones for a scheme. | 1st Nov 1926 | Box 168b \ 3 img116 | |
| Special batteries for a 40/50 chassis, quoting a letter from Peto & Radford about their manufacture and damage to a previous delivery. | 9th Nov 1926 | Box 168b \ 3 img117 | |
| Supply and condition of special batteries for a 40/50 chassis from Peto & Radford. | 9th Nov 1926 | Box 168b \ 3 img118 | |
| Supply condition and delivery schedule for batteries. | 12th Nov 1926 | Box 168b \ 3 img119 | |
| Requesting a fortnight's advance notice for when special batteries will be required for the two EAC.7 chassis. | 12th Nov 1926 | Box 168b \ 3 img120 | |
| Missing lid-holding bolt for a P & R 6-volt battery unit intended for an EAC.7 chassis. | 16th Dec 1926 | Box 168b \ 3 img121 | |
| Form for recording the routine treatment of car lighting and starting batteries. | 5th Jan 1927 | Box 168b \ 3 img122 | |
| Graph recording a discharge test for a 6-volt monobloc battery. | 6th Jan 1927 | Box 168b \ 3 img123 | |
| Battery charging and performance test results. | 14th Jan 1927 | Box 168b \ 3 img124 | |
| Graph showing the discharge curve and performance data for a 6-volt monobloc battery. | 14th Jan 1927 | Box 168b \ 3 img125 | |
| Test log of battery performance, detailing charge cycles, cell densities, and temperature readings. | 7th Jan 1927 | Box 168b \ 3 img126 | |
| Fault on a 6-volt Dagenite battery unit on vehicle 14-EX and arranging a replacement. | 28th Feb 1927 | Box 168b \ 3 img127 | |
| Letter regarding a fault on a BTH/11 type 6-volt battery where the lid studs have pulled out of the Dagenite. | 9th Mar 1927 | Box 168b \ 3 img128 | |
| Letter from accumulator manufacturer Peto & Radford regarding a fault with a 6-volt battery. | 11th Mar 1927 | Box 168b \ 3 img129 | |
| 12-volt battery being too wide for the Phantom Chassis battery box and instructing on modifications. | 18th Aug 1927 | Box 168b \ 3 img130 | |
| Oversized 'P & R' battery that will not fit into the steel box in the Phantom chassis frame. | 19th Aug 1927 | Box 168b \ 3 img131 | |
| Procedure for working on a mistakenly charged battery for a Phantom model. | 19th Aug 1927 | Box 168b \ 3 img132 | |
| Urgently requesting a divided battery for bumper tests on a Phantom chassis. | 25th Aug 1927 | Box 168b \ 3 img133 | |
| Manufacturing mistake on a steel battery box which was cut too fine to fit the 6-volt batteries. | 25th Aug 1927 | Box 168b \ 3 img134 | |
| Letter to a supplier regarding supplied 6-volt batteries that do not conform to the specified dimensions. | 30th Aug 1927 | Box 168b \ 3 img135 | |
| Letter from Peto & Radford concerning a disagreement over battery dimensions and tolerances. | 2nd Sep 1927 | Box 168b \ 3 img136 | |
| Letter from Peto & Radford concerning a remedy for loose terminal nuts on their P&R accumulators, with an enclosed sample. | 6th Sep 1927 | Box 168b \ 3 img137 | |
| Data log on graph paper recording test measurements and calculations. | 20th Oct 1927 | Box 168b \ 3 img138 | |
| Instruction sheet detailing high and low rate discharge test results for a P&R BDH 11-1-2 battery. | 20th Oct 1927 | Box 168b \ 3 img139 | |
| Test chart recording of electrical performance data with handwritten annotations. | 11th Nov 1927 | Box 168b \ 3 img140 | |
| Confirming an order for batteries for a sports chassis. | 5th Jan 1928 | Box 168b \ 3 img141 | |
| Particulars in order to purchase batteries for a sports chassis. | 9th Jan 1928 | Box 168b \ 3 img142 | |
| Ordering three batteries for Sports Chassis EAC.14, stressing adherence to the drawing. | 1st Jan 1926 | Box 168b \ 3 img143 | |
| Letter from a supplier regarding battery box dimensions for order number 73602. | 18th Jan 1928 | Box 168b \ 3 img144 | |
| Requesting that P & R batteries in 6-volt units be dispatched in a charged condition. | 20th Jan 1928 | Box 168b \ 3 img145 | |
| Supplier's concerns about the woodwork of 6-volt battery cases. | 7th Feb 1928 | Box 168b \ 3 img146 | |
| Battery container specifications and proposing an order for alternative units with moulded containers. | 8th Feb 1928 | Box 168b \ 3 img147 | |
| Letter discussing battery performance concerning temperature, age, and wooden container specifications. | 10th Feb 1928 | Box 168b \ 3 img148 | |
| Design limitations of sheet metal battery boxes and the difficulty of battery maintenance. | 1st Feb 1928 | Box 168b \ 3 img149 | |
| Costs and difficulties of producing moulds for a two-unit battery scheme, quoting supplier correspondence. | 1st Feb 1928 | Box 168b \ 3 img150 | |
| Letter from Peto & Radford discussing battery voltage fluctuations, manufacturing dimensions, and topping up difficulties. | 14th Feb 1928 | Box 168b \ 3 img151 | |
| New two-unit P & R battery for Sports cars and the lack of testing before adoption. | 15th Feb 1928 | Box 168b \ 3 img152 | |
| Issues with the dimensions and wooden containers of special 6-volt batteries. | 15th Feb 1928 | Box 168b \ 3 img153 | |
| Difficulties in fitting two-unit batteries into sports cars. | 18th Feb 1928 | Box 168b \ 3 img154 | |
| The difficulties encountered when topping up a battery and adjusting electrolyte levels. | 1st Mar 1926 | Box 168b \ 3 img155 | |
| The difficulties with fitting and accessing the two-unit battery on the Phantom Sports Model chassis. | 1st Mar 1926 | Box 168b \ 3 img156 | |
| Battery accessibility, overheating due to engine heat, and proposed improvements for battery lids. | 1st Mar 1926 | Box 168b \ 3 img157 | |
| Observations on battery deterioration in experimental cars fitted with an auto switch. | 1st Mar 1928 | Box 168b \ 3 img158 | |
| Suggesting the procurement of 6-volt battery boxes to reconfigure and test cells from existing 12-volt batteries. | 1st Mar 1928 | Box 168b \ 3 img159 | |
| Cover letter to Mr. G.R.N. Minchin informing him of an enclosed report. | 2nd Mar 1928 | Box 168b \ 3 img160 | |
| Order for two-unit battery cases, and stock availability from a cancelled Sports Continental order. | 2nd Mar 1928 | Box 168b \ 3 img161 | |
| Letter from accumulator manufacturer Peto & Radford regarding battery issues and procedures. | 3rd Mar 1928 | Box 168b \ 3 img162 | |
| Difficulties and solutions for the two-unit battery installation in the Phantom frame. | 26th Mar 1928 | Box 168b \ 3 img163 | |
| Clarifying an error regarding the quantity of two-unit battery cases required for chassis testing. | 17th Mar 1928 | Box 168b \ 3 img164 | |
| The battery condition and accessibility on a 19-EX Phantom chassis with a sports body after 9000 miles. | 17th Mar 1928 | Box 168b \ 3 img165 | |
| Request for a damage report on batteries removed from vehicle 15-EX following an accident. | 8th May 1928 | Box 168b \ 3 img166 | |
| To the Repair Department confirming that batteries from 15-EX are not mechanically damaged from an accident. | 8th May 1928 | Box 168b \ 3 img167 | |
| Form for recording the routine treatment and testing of car lighting and starting batteries. | 12th May 1928 | Box 168b \ 3 img168 | |
| Battery test log sheet for recording cell density, voltage, and cadmium readings during charging. | 23th Feb 1926 | Box 168b \ 3 img169 | |
| Battery cell test data log showing density, voltage, and cadmium readings. | 23th Feb 1926 | Box 168b \ 3 img170 | |
| Battery test log showing results for the fourth and fifth charges, including cell density and voltage readings. | 4th Jun 1928 | Box 168b \ 3 img171 | |
| Issue with slack vent plugs on 40/50 HP batteries causing stripped threads. | 27th Jun 1925 | Box 168b \ 3 img172 | |
| Electrical experimental record sheet tracking battery usage and mileage. | 13th May 1928 | Box 168b \ 3 img173 | |
| Graph charting electrical discharge performance over time. | 29th Aug 1928 | Box 168b \ 3 img174 | |
| Test results for a P.R.B.D.H.11-2-4 Battery, detailing low and high rate discharge performance. | 31th May 1926 | Box 168b \ 3 img175 | |
| Re-test results for a battery after completing 11,256 miles on an ISEX car in France. | 7th Jul 1928 | Box 168b \ 3 img176 | |
| Electrical experimental record sheet for a battery, tracking mileage and condition. | 6th Oct 1928 | Box 168b \ 3 img177 | |
| Construction and ordering of a 12-volt battery for an SS chassis. | 1st Nov 1928 | Box 168b \ 3 img178 | |
| The provision of a blueprint for a battery drawing under scheme 2743. | 3rd Nov 1928 | Box 168b \ 3 img179 | |
| Inefficient fastening method for wooden battery covers on a P & R 6-volt (14-EX) battery, and a proposed solution. | 8th Nov 1928 | Box 168b \ 3 img180 | |
| Order for four more sets of two-unit batteries for an experimental chassis, referencing blueprint F.79640. | 22th Nov 1928 | Box 168b \ 3 img181 | |
| The inaccessibility of the 'SS' battery box and the risks involved in its maintenance. | 1st Dec 1928 | Box 168b \ 3 img182 | |
| Letter from accumulator manufacturer Peto & Radford acknowledging comments on two batteries. | 6th Dec 1928 | Box 168b \ 3 img183 | |
| Letter to a supplier regarding quality issues with recently received batteries. | 5th Dec 1926 | Box 168b \ 3 img184 | |
| Letter from a supplier regarding production delays and moulding issues with two-unit batteries. | 13th Feb 1929 | Box 168b \ 3 img185 | |
| Attached letter from Messrs Peto & Radford regarding 40/50-HP chassis two-unit batteries. | 15th Feb 1929 | Box 168b \ 3 img186 | |
| Graph recording the results of an electrical test, including average amperes, hours, and ampere-hours. | 24th Feb 1929 | Box 168b \ 3 img187 | |
| Instructions for modifying the resistance values of a component. | 26th Feb 1929 | Box 168b \ 3 img188 | |
| The order of batteries for the Experimental Department cars. | 13th Mar 1929 | Box 168b \ 3 img189 | |
| Requesting the purchase of four 6-volt batteries for two experimental chassis from Messrs. Peto & Radford. | 1st May 1929 | Box 168b \ 3 img190 | |
| Faulty P & R 6-volt battery being returned to the makers for repair under guarantee. | 14th May 1929 | Box 168b \ 3 img191 | |
| Continually leaking battery cell fault and a guarantee claim. | 14th May 1929 | Box 168b \ 3 img192 | |
| Tests of sustained Potential Difference (PD) on a battery at various rates of charge and temperatures. | 16th May 1929 | Box 168b \ 3 img193 | |
| Estimating battery temperatures and open-circuit voltages under various conditions. | 16th May 1929 | Box 168b \ 3 img194 | |
| Letter from battery manufacturer Peto & Radford suggesting a change to burnt cell-to-cell connections for 40/50 HP car batteries. | 16th May 1929 | Box 168b \ 3 img195 | |
| Letter to Messrs. Peto & Radford regarding battery cell to cell connections. | 17th May 1929 | Box 168b \ 3 img196 | |
| Letter from Peto & Radford advocating for burnt cell connections on a 40/50 HP battery. | 22th May 1929 | Box 168b \ 3 img197 | |
| Letter to Messrs. Peto & Radford discussing the merits of burnt up versus bolted battery connections. | 24th May 1929 | Box 168b \ 3 img198 | |
| Page 2 of a letter to Messrs. Peto & Radford regarding bolted versus burnt up connections. | 24th May 1929 | Box 168b \ 3 img199 | |
| Free-of-charge repair of a 6 volt BDH.13 Battery. | 24th May 1929 | Box 168b \ 3 img200 | |
| Request to obtain two standard 6-volt batteries for experimental cars from Messrs. Peto & Radford. | 26th May 1929 | Box 168b \ 3 img201 | |
| Complaint regarding a 6-volt battery that continues to leak after a repair. | 6th Jun 1929 | Box 168b \ 3 img202 | |
| Letter of complaint to Messrs. Peto & Radford regarding a faulty battery repair. | 6th Jun 1929 | Box 168b \ 3 img203 | |
| Letter from a battery manufacturer regarding a leaking 6-volt unit that they had recently repaired. | 7th Jun 1929 | Box 168b \ 3 img204 | |
| Letter to Peto & Radford regarding a faulty battery that is leaking again after a recent repair. | 10th Jun 1929 | Box 168b \ 3 img205 | |
| Sending a P & R battery to be returned to Peto & Radford for repair. | 1st Jun 1929 | Box 168b \ 3 img206 | |
| Electrical experimental record sheet logging tests on a 6-volt monobloc battery, tracking dates, locations, remarks, and mileage from 1926 to 1929. | 19th Apr 1926 | Box 168b \ 3 img207 | |
| Electrical experimental record sheet for a P & R DOH 11/2 battery, tracking mileage and tests. | 19th Apr 1926 | Box 168b \ 3 img208 | |
| Electrical experimental record sheet tracking the usage and mileage of a battery. | 1st Jul 1929 | Box 168b \ 3 img209 | |
| Experimental and test sheet for a battery, logging usage dates, locations, and mileage. | 1st Jul 1929 | Box 168b \ 3 img210 | |
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