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2. A23 battery - Wikipedia

   en.wikipedia.org/wiki/A23_battery

   A23 batteries are constructed of eight individual LR932 alkaline button cells enclosed in a wrapper. The A23 battery is close in size to the N battery, which has a voltage of 1.25 V to 1.5 V. It is also similar to the A27 battery, which has the same 12 V nominal voltage and almost the same length but is smaller in diameter by about 20%. [5]

3. A-series light bulb - Wikipedia

   en.wikipedia.org/wiki/A-series_light_bulb

   The most commonly used A-series light bulb type is an A60 bulb [7] (or its inch-based equivalent, the A19 bulb [2] [4]), which is 60 mm (19 ⁄ 8 in or 2 + 3 ⁄ 8 in) wide at its widest point [3] and approximately 110 mm (4 + 3 ⁄ 8 in) in length. [8] Other sizes with a data sheet in IEC 60064 are A50, A55, A67, A68, A71, A75, and A80.

4. Rechargeable battery - Wikipedia

   en.wikipedia.org/wiki/Rechargeable_battery

   A rechargeable battery, storage battery, or secondary cell (formally a type of energy accumulator), is a type of electrical battery which can be charged, discharged into a load, and recharged many times, as opposed to a disposable or primary battery, which is supplied fully charged and discarded after use.

5. Compact fluorescent lamp - Wikipedia

   en.wikipedia.org/wiki/Compact_fluorescent_lamp

   CFLs are generally not designed or rated for outdoor use and some will not start in cold weather. CFLs are available with cold-weather ballasts, which may be rated to as low as −28.8 °C (−20 °F). [68] Light output during the first few minutes of operation is limited at low temperatures before reaching full brightness. [69]

6. 78th Searchlight Regiment, Royal Artillery - Wikipedia

   en.wikipedia.org/wiki/78th_Searchlight_Regiment...

   Formation sign of 11th AA Division. By the time 78th S/L Rgt joined, The Blitz was in full swing, with frequent night air raids on the industrial cities. The role of the S/L units was to track and illuminate raiders for the Heavy AA (HAA) guns of the Gun Defence Areas (GDAs) and for the few available Royal Air Force Night fighters.