Coin 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.

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 chemisty:
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?
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
HK$13.576
Each (In a Pack of 5)
units
- SR44 - Silver Oxide 1.55V 165mAh Standard 11.6mm 11.6 x 5.4mm -
RS Stock No. 775-7233
BrandRS PRO
HK$4.916
Each (In a Pack of 5)
units
- LR44 - Alkaline 1.5V 158mAh Standard 11.53mm 11.53 x 5.43 -
RS Stock No. 514-7766
BrandRS PRO
HK$4.444
Each (In a Pack of 5)
units
- SR66 - Silver Oxide 1.55V 25mAh Standard 6.8mm 6.8 x 2.6mm -
RS Stock No. 514-7700
BrandRS PRO
HK$10.736
Each (In a Pack of 5)
units
- SR43 - Silver Oxide 1.55V 120mAh Standard 11.6mm 11.6 x 4.2mm -
RS Stock No. 514-7716
BrandRS PRO
HK$9.27
Each (In a Pack of 5)
units
- SR45 - Silver Oxide 1.55V 60mAh Standard 9.5mm 9.5 x 3.6mm -
RS Stock No. 595-637
BrandRS PRO
HK$8.80
Each (In a Pack of 5)
units
- SR48 - Silver Oxide 1.55V 70mAh Standard 7.9mm 7.9 x 5.4mm -
RS Stock No. 593-439
BrandRS PRO
HK$11.57
Each (In a Pack of 5)
units
- SR54 - Silver Oxide 1.55V 70mAh Standard 11.6mm 11.6 x 3.05mm -
RS Stock No. 593-401
BrandRS PRO
HK$14.13
Each (In a Pack of 5)
units
- SR41 - Silver Oxide 1.55V 42mAh Standard 7.9mm 7.9 x 3.6mm -
RS Stock No. 514-7750
BrandRS PRO
HK$5.936
Each (In a Pack of 5)
units
- SR60 - Silver Oxide 1.55V 18mAh Standard 6.8mm 6.8 x 2.15mm -
RS Stock No. 595-659
BrandRS PRO
HK$7.604
Each (In a Pack of 5)
units
- SR55 - Silver Oxide 1.55V 40mAh Standard 11.6mm 11.6 x 2.1mm -
RS Stock No. 798-9408
BrandDuracell
HK$8.358
Each (In a Pack of 6)
units
- PR70 - Zinc Air 1.4V - Standard 5.8mm 5.8 x 3.6mm -
RS Stock No. 798-9405
BrandDuracell
HK$8.788
Each (In a Pack of 6)
units
- PR48 - Zinc Air 1.4V - Standard 7.9mm 7.9 x 5.4mm -
RS Stock No. 514-7722
BrandRS PRO
HK$4.05
Each (In a Pack of 5)
units
- SR58 - Silver Oxide 1.55V 24mAh Standard 7.9mm 7.9 x 2.1mm -
RS Stock No. 798-9391
BrandDuracell
HK$9.455
Each (In a Pack of 6)
units
- PR44 - Zinc Air 1.4V - Standard 11.6mm 11.6 x 5.4mm -
New
RS Stock No. 188-2129
Mfr. Part No.6430101501
BrandVarta
HK$23.42
Each
units
6430 - - Lithium Manganese Dioxide, Organic Electrolyte 3V 300mAh - 24.5mm 24.5 Dia. x 3mm CR
RS Stock No. 183-9479
Mfr. Part No.BR-2032/F2N
BrandPanasonic
HK$32.74
Each
units
- BR2032 - Lithium Polycarbon Monofluoride 3V 200mAh - 20mm 20 (Dia.) x 3.2mm BR
New
RS Stock No. 188-1981
Mfr. Part No.20321903501
BrandVarta
HK$8.37
Each (In a Pack of 1000)
units
20321 - - NaOH Electrolyte, Silver Oxide, Zinc 1.55V 14.5mAh - 6.8mm 6.8 Dia. x 1.65mm V MF
New
RS Stock No. 188-2131
Mfr. Part No.20395903501
BrandVarta
HK$11.056
Each (In a Pack of 5)
units
20395 - - NaOH Electrolyte, Silver Oxide, Zinc 1.55V 38mAh - 9.5mm 9.5 Dia. x 2.7mm V MF
RS Stock No. 183-9493
Mfr. Part No.CR-123PE/BN
BrandPanasonic
HK$51.37
Each
units
- CR123A - Lithium Manganese Dioxide 3V 1.4Ah - 17mm 17 (Dia.) x 34.5mm CR
RS Stock No. 183-9473
Mfr. Part No.BR-1225A/HBN
BrandPanasonic
HK$73.87
Each
units
- BR1225 - Lithium Polycarbon Monofluoride 3V 48mAh - 12.5mm 12.5 (Dia.) x 2.5mm BR
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