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 183-4296
BrandRS PRO
HK$34.37
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/個 (每包:1000個)
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V389 SR54 - KOH Electrolyte, Silver Oxide, Zinc 1.55V 81mAh Standard 11.6mm 11.6 x 3.1mm V MF
RS庫存編號 188-2115
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BrandVarta
HK$11.302
/個 (每包:5個)
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RS庫存編號 183-9487
製造零件編號BR-2477A/GAN
BrandPanasonic
HK$99.07
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BR2477A BR2477A - Lithium Polycarbon Monofluoride 3V 1Ah Standard 24.5mm 24.5 x 7.7mm BR
RS庫存編號 188-1981
製造零件編號20321903501
BrandVarta
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/個 (每包:1000個)
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V321 SR65 - NaOH Electrolyte, Silver Oxide, Zinc 1.55V 14.5mAh Standard 6.8mm 6.8 x 1.7mm V MF
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BrandVarta
HK$21.51
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CR2032 CR2032 - Lithium Manganese Dioxide, Organic Electrolyte 3V 230mAh PCB Pin 20mm 20 x 3.2mm CR
RS庫存編號 191-5221
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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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CR2450R-HE6 CR2450 CR2450 Lithium Manganese Dioxide 3V 500mAh PCB Pin 24.5mm 24.5 x 5mm CR
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BrandVarta
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/個 (每包:5個)
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BrandRS PRO
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/個 (每包:6個)
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RS庫存編號 183-9481
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BrandPanasonic
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RS庫存編號 183-9492
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BrandPanasonic
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CR3032 CR3032 - Lithium Manganese Dioxide 3V 500mAh Standard 30mm 30 x 3.2mm CR
RS庫存編號 183-4299
BrandRS PRO
HK$11.958
/個 (每包:5個)
單位
CR2477 CR2477 - Lithium Manganese Dioxide 3V 1Ah Standard 24.5mm 24.5 x 7.7mm CR
RS庫存編號 191-8146
製造零件編號97384003 LR44/8MR1WW
BrandMurata
HK$6.184
/個 (每包:5個)
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LR44 LR44 - Alkaline Manganese Dioxide 1.5V 120mAh Standard 11.6mm 11.6 x 5mm LR
RS庫存編號 188-1991
製造零件編號20395903501
BrandVarta
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