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Drydex Battery T20

Drydex Battery T20; Chloride Electrical (ID = 1533626) Power-S  
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Drydex Battery T20; Chloride Electrical (ID = 1533626) Power-S
Chloride Electrical: Drydex Battery T20 [Power-S] ID = 1533626 465x719
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For model Drydex Battery T20, Chloride Electrical Storage Company Ltd; London:
Late version (leak proof?) Edited and Enlarged from ebay 121184979166 yeyifoundit
Country:  Great Britain (UK)
Manufacturer / Brand:  Chloride Electrical Storage Company Ltd; London
Year: 1930 ?? Category: Power supply/conditioner or battery or charger 
Wave bands - without
Power type and voltage Is a battery or storage battery / 1.5 Volt
Loudspeaker - - No sound reproduction output.
Power out
from Model: Drydex Battery T20 - Chloride Electrical Storage
Dimensions (WHD) 31 x 64 x 31 mm / 1.2 x 2.5 x 1.2 inch

Cylindrical Zinc Carbon "D" Cell. Utility Flashlight (Torch) battery from 19th Century. About 6000mAH at low current drain (25mA). Varies from 1.7V (fresh, no load) to 0.9V (Exhusted).

Transistor Radio sets commonly use 4 for 6V. Some models may use 2 or 6. LT for battery valves use 1 (or 2 in parallel) for "Personal" sets and some 1950s models used 5 in series for 7.5V nominal or 6 for a radio with RF preamp. Many LT or Combo battery packs used these internally. Many Miltary Radios used these as emergency alternates to Rechargeable packs (24V using NiCd "D" size ).

Originally card or paper covered with tar seal at top. Modern versions use a hollow plastic bung, with cheap brands using TWO bungs to save on content! May be the 2nd Dry Cell commercially available. The outer can is the Zinc Electrode.

"Dry Cells" are called "Unit Cells" up till mid 1930s.

Later Zinc Carbon types are "Leak Proof" construction (not actually leak proof). Later Exide Drydex Leakproof model is actually branded "SP2" rather than T20.
High Power versions are usually Zinc Chloride.

Alkaline Types can be used instead but weigh a lot more (Duracell, Energiser and equivalents) though in low current drain capacity is only x2. In 1930 Shelf life was about 6 months and by 1946 about 18 Months. Now about 24 months in temperate conditions compared with over five years for Alkaline.


  • Ever Ready U2, later SP2, LP2, and Zinc Chloride HP2
  • Generic "D" or IEC R20 (Alkaline is LR20)
  • GEC: BA6103
  • Siemens T1
  • Vidor V0002
Net weight (2.2 lb = 1 kg) 0.1 kg / 0 lb 3.5 oz (0.22 lb)

Model page created by Michael Watterson. See "Data change" for further contributors.

All listed radios etc. from Chloride Electrical Storage Company Ltd; London
Here you find 32 models, 25 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.