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庫存編號 188-2127
製造零件編號20394903501
BrandVarta
HK$12.904
/個 (每包:5個)
單位
V394 SR936 - NaOH Electrolyte, Silver Oxide, Zinc 1.55V 58mAh Standard 9.5mm 9.5 x 3.6mm V MF
RS庫存編號 183-9493
製造零件編號CR-123PE/BN
BrandPanasonic
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CR123A CR123A - Lithium Manganese Dioxide 3V 1.4Ah PCB Pin 17mm 17 x 34.5mm CR
RS庫存編號 188-1988
製造零件編號20393903501
BrandVarta
HK$10.498
/個 (每包:500個)
單位
V393 SR48 - KOH Electrolyte, Silver Oxide, Zinc 1.55V 77mAh Standard 7.9mm 7.9 x 5.4mm V MF
RS庫存編號 183-4285
BrandRS PRO
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- SR63 - Silver Oxide 1.55V 14mAh Standard 5.8mm 5.8 x 2.15mm SR
RS庫存編號 183-9488
製造零件編號CR-1025/BN
BrandPanasonic
HK$20.23
單位
CR1025 CR1025 CR1025 Lithium Manganese Dioxide 3V 30mAh Standard 10mm 10 x 2.5mm CR
RS庫存編號 188-2129
製造零件編號6430101501
BrandVarta
HK$22.75
單位
CR2430 CR2430 - Lithium Manganese Dioxide, Organic Electrolyte 3V 300mAh Standard 24.5mm 24.5 x 3mm CR
RS庫存編號 191-5221
製造零件編號97384197
BrandMurata
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1 Tray of 250 Pack(s)
Tray(s)
CR2450X-HE6 CR2450 CR2450 Lithium Manganese Dioxide 3V 600mAh PCB Pin 24.5mm 24.5 x 5mm CR
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RS庫存編號 188-1990
製造零件編號20394903501
BrandVarta
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/個 (每包:1000個)
單位
V394 SR936 - NaOH Electrolyte, Silver Oxide, Zinc 1.55V 58mAh Standard 9.5mm 9.5 x 3.6mm V MF
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/個 (每包:6個)
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BrandMurata
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製造零件編號BR-2450A/GAN
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RS庫存編號 188-2131
製造零件編號20395903501
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CR2450 CR2450 CR2450 Lithium Manganese Dioxide 3V 600mAh PCB Pin 24.5mm 24.5 x 5mm CR
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