Button Batteries

Button batteries, also referred to as coin cells, coin batteries or button cells, are circular, non-rechargeable batteries. They are used to power electronic devices, such as clocks, remote control toys and wristwatches.

Sizes:

The most common naming standard is from the International Electrotechnical Commission or IEC. This typically consists of 2 letters, followed by 3 or 4 numbers.

The first letter defines the chemistry:

  • L – Alkaline manganese dioxide
  • S – Silver oxide
  • P – Zinc-air
  • C – Lithium manganese dioxide
  • B – Lithium carbon monofluoride
  • G – Lithium copper oxide

The second letter defines the shape:

  • R – Round
  • F – Flat
  • S – Square
  • P – All others that aren’t defined as round, flat or square.

The numbers that follow the letters reference the diameter and the height. If the number ends with 1025, the battery has a 10 mm diameter and a 2.5 mm height.

Applications:

Due to their size, button batteries are used for smaller electronic devices. Standard domestic applications include watches, scales, remote controls and calculators. They can be found in greeting cards, and are used to power small LEDs or speakers within the card.

Coin batteries can also be used to power medical devices such as hearing aids, implantable defibrillators and pacemakers.

Which battery should I use?

Coin batteries have a very long shelf life. They have low levels of self-discharge which means they are able to hold their charge for a long time without losing any power. Coin cells are constructed with 1 of 3 types of battery chemistry. This can help you to choose the most suitable battery for your application.

Alkaline button batteries:

These are an economic solution as they are cheaper than lithium or silver oxide batteries. They do not maintain constant voltage throughout their lifespan like other batteries do. This means that the voltage drops consistently and they typically last half as long as lithium or silver oxide batteries. They have less capacity than silver oxide and lithium batteries.

Silver oxide and lithium button batteries:

Lithium and silver oxide coin batteries have stable voltage throughout their lifespan. Unlike alkaline batteries, they are subject to a drop in voltage quite suddenly as they approach end of life. They are more resistant to corrosion and have better leakage resistance. The main difference between silver oxide and lithium batteries is the voltage. Lithium batteries provide voltage of 3 V while silver oxide batteries offer 1.5 V.


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Description Price Model Number Size IEC Name Chemistry Nominal Voltage Capacity Terminal Type Diameter Dimensions Series
RS Stock No. 593-423
BrandRS PRO
€8.38
1 Pack of 5
Pack(s)
- SR44 - Silver Oxide 1.55V 165mAh Standard 11.6mm 11.6 x 5.4mm SR
RS Stock No. 775-7233
BrandRS PRO
€3.08
1 Pack of 5
Pack(s)
LR44 LR44 - Alkaline 1.5V 158mAh Standard 11.6mm 11.53 x 5.43mm LR
RS Stock No. 866-0672
BrandRS PRO
€5.12
1 Pack of 5
Pack(s)
CR2032 CR2032 - Lithium Manganese Dioxide 3V 225mAh Standard 20mm 20 x 3.2mm CR
RS Stock No. 866-0675
BrandRS PRO
€8.43
1 Pack of 5
Pack(s)
CR2430 CR2430 - Lithium Manganese Dioxide 3V 300mAh Standard 24.5mm 24.5 x 3mm CR
RS Stock No. 866-0679
BrandRS PRO
€7.37
1 Pack of 5
Pack(s)
CR2450 CR2450 - Lithium Manganese Dioxide 3V 620mAh Standard 24.5mm 24.5 x 5mm CR
RS Stock No. 514-7766
BrandRS PRO
€3.44
1 Pack of 5
Pack(s)
- SR66 - Silver Oxide 1.55V 25mAh Standard 6.8mm 6.8 x 2.6mm SR
RS Stock No. 866-0663
BrandRS PRO
€2.53
1 Pack of 5
Pack(s)
CR2025 CR2025 - Lithium Manganese Dioxide 3V 160mAh Standard 20mm 20 x 2.5mm CR
RS Stock No. 593-401
BrandRS PRO
€5.28
1 Pack of 5
Pack(s)
- SR41 - Silver Oxide 1.55V 42mAh Standard 7.9mm 7.9 x 3.6mm SR
RS Stock No. 866-0669
BrandRS PRO
€6.08
1 Pack of 5
Pack(s)
CR2016 CR2016 - Lithium Manganese Dioxide 3V 90mAh Standard 20mm 20 x 1.6mm CR
RS Stock No. 593-439
BrandRS PRO
€7.18
1 Pack of 5
Pack(s)
- SR54 - Silver Oxide 1.55V 70mAh Standard 11.6mm 11.6 x 3.05mm SR
RS Stock No. 514-7750
BrandRS PRO
€3.37
1 Pack of 5
Pack(s)
- SR60 - Silver Oxide 1.55V 18mAh Standard 6.8mm 6.8 x 2.15mm SR
RS Stock No. 866-0666
BrandRS PRO
€5.80
1 Pack of 5
Pack(s)
CR1620 CR1620 - Lithium Manganese Dioxide 3V 75mAh Standard 16mm 16 x 2mm CR
RS Stock No. 866-0653
BrandRS PRO
€5.80
1 Pack of 5
Pack(s)
CR1220 CR1220 - Lithium Manganese Dioxide 3V 36mAh Standard 12.5mm 12.5 x 2mm CR
RS Stock No. 494-2374
BrandRS PRO
€5.45
1 Pack of 5
Pack(s)
- SR69 - Silver Oxide 1.55V 44mAh Standard 9.5mm 9.5 x 2.1mm SR
RS Stock No. 494-2396
BrandRS PRO
€4.36
1 Pack of 5
Pack(s)
- SR63 - Silver Oxide 1.55V 14mAh Standard 5.8mm 5.8 x 2.15mm SR
RS Stock No. 866-0657
BrandRS PRO
€6.08
1 Pack of 5
Pack(s)
CR1616 CR1616 - Lithium Manganese Dioxide 3V 55mAh Standard 16mm 16 x 1.6mm CR
RS Stock No. 494-2403
BrandRS PRO
€5.81
1 Pack of 5
Pack(s)
- SR57 - Silver Oxide 1.55V 55mAh Standard 9.5mm 9.5 x 2.7mm SR
RS Stock No. 514-7700
BrandRS PRO
€7.06
1 Pack of 5
Pack(s)
- SR43 - Silver Oxide 1.55V 120mAh Standard 11.6mm 11.6 x 4.2mm SR
RS Stock No. 595-659
BrandRS PRO
€5.12
1 Pack of 5
Pack(s)
- SR55 - Silver Oxide 1.55V 40mAh Standard 11.6mm 11.6 x 2.1mm SR
RS Stock No. 595-637
BrandRS PRO
€6.76
1 Pack of 5
Pack(s)
- SR48 - Silver Oxide 1.55V 70mAh Standard 7.9mm 7.9 x 5.4mm SR