The Batteries – PART 3: Disposable Batteries – Continue

  The Batteries – PART 3: Disposable Batteries – Continue

    Let’s remember : We have been separated the batteries in two categories:

  • Primary or Disposable Batteries;
  • Secondary or Rechargeable Batteries.

   In the previous Part 2, we are making a condensed overview the Disposable Batteries.

   With the Today Topic, we continue to explain the disposable Batteries.

   Uncovering The Disposable Battery – Continue:




PIC. 1  The Oxygen, Open Air Button Battery

   The open air button battery – this cell works with an Oxygen, Yes, it needs a fresh air to work, same to us and you! The positive electrode is … the Oxygen!

   This example is jusт for comprehensiveness. You need to know, that such kind of battery is existing.

   Such kind of batteries, with their the highest possible efficiency, but, unfortunately very few fields of application, only for hearing aids, because of the hydrophobic manner of the oxygen – easy collect andoxidizes the hydrogen”creating the water molecules, deteriorating its own work.


   Let we remember the button type battery cell:


PIC. 2  Common look of the Lithium Button Battery  and Uncovering internal ingredients.

   Anode Cap (-) Negative Terminal , Cell Can (+) Positive Terminal. Between both of them, there is a gasket.

   Anode Lithium Aluminum, Separator, Collector, Cathode – V2O5.


   Let’s say  a few words for Little Watch Lithium Batteries and middle sized Lithium Button Batteries.

   The following general parameters of the Button Batteries are focusing our interest:

  • The EMF Voltage – Open Terminal Nominal Voltage,
  • The Sizes – Diameter , Height,
  • The Capacity, [ current in milliamperes per Hour, mA/h]
  • The Applications, Hearing aids, Toys, light torches, sensors, IoT Modern wireless LE devices for telemetry, Automotive TPMS external sensor powering
  • The Shelf life. – almost each one type Watch and Button Battery Cell have about 10 years a shelf life.


PIC. 3  Battery Shelf Life Info By Energizer®

   Thanks To the Energizer® for a compact form of this detailed document .

   There are a huge amount of sizes, suitable for almost every possible design and sphere of usage.The battery sizes are heir capacity varied

   The Watch and button battery manufacturers successfully arranged their products into a few “Standard”sizes – starting from 4.8 mm, jumping with steps for example by : 1 mm, 1.5 mm, 2mm, button batteries 2.5 mm, 3.5mm, 4 mm, etc. and continuing to 24.5mm  grouped by the battery diameter and 2 by 6 assortment arranged by the cell height.  strictly  heir capacity varied

   The common rule is: the largest battery has the biggest capacity – the capacity varies for example(the smallest 1.5V watch battery –  SR416SW  ): from  8 mA/h for 4.8 mm diameter/1.65mm c –  to about 190 mA/h  11.6 mm diameter / 5.4 mm height –  SR44W ).

   Some of You probably don’t know Another cool  “extra” – the battery sizes are coded into the battery name.

   Let’s see the Small List we prepare for example:

1.55 V Lithium Watch Batteries cell:

Dimensions: Battery Watch Number Battery Name Capacity
4.8 x 1.65 mm  337 SR416SW 8 mAh
5.8 x 1.65 mm 317 SR516SW 10 mAh
6.8 x 2.6 mm 377
28 mAh
7.9 x 1.29 mm 346 SR712SW 10 mAh
7.9 x 3.1 mm 329 SR731SW 37 mAh
9.5 x 2.05 mm  371 SR920SW 38 mAh
11.6 x 3.6 mm 344 SR1136SW 105 mAh


   Example: 9.5 mm x 2.05 mm    – Battery Name:  SR920SW    – The First number shows the diameter, second and third number – the integer and the decimal part of the height – precision is no too good, but it is enough indicative.

 3V Lithium Button Batteries :
Dimensions: Battery Name Capacity
12.5 x 1.6 mm CR1216 25 mAh
12.5 x 2.0 mm CR1220 38 mAh
12.5 x 2.5 mm CR1225 48 mAh
16.0 x 2.0 mm CR1620 68 mAh
20.0 x 1.6 mm  CR2016 80 mAh
20.0 x 2.5 mm  CR2025  150 mAh
20.0 x 3.2 mm   CR2032 200 mAh
24.5 x 7.7 mm  CR2477N 950 mAh


   Example : 20.0 x 3.2 mm     – Battery Name:  CR2032   – First pair of numbers shows the diameter and third and fourth number – the integer and the decimal part of the height – the precision is good.
   The very useful  CR2032 Battery has a significant capacity – almost 200 mA/h – It means it is possible such type of battery to power the light torch based on the high lumen white LED with a good boost DC/DC LED driver can deliver 10 milliamperes current through the LED for near all day long.
   It could be а “lifesaving gadget” in a trouble situation for cavers with running out all their headlamps, scurrying around into long labyrinths of the newly discovered cave.

Don’t Stop To Reinvent Yourself, Dear Explorers!




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