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 Brand Range Size Chemistry Nominal Voltage Capacity Terminal Type Diameter Dimensions Weight
RS Stock No. 593-423
BrandRS PRO
HK$15.636
Each (In a Pack of 5)
units
RS SR44 Silver Oxide 1.55V 165mAh Standard 11.6mm 11.6 x 5.4mm 2.2g
RS Stock No. 775-7233
BrandRS PRO
HK$3.44
Each (In a Pack of 5)
units
RS LR44 Alkaline 1.5V 158mAh Standard 11.53mm 11.53 x 5.43 2g
RS Stock No. 514-7766
BrandRS PRO
HK$5.344
Each (In a Pack of 5)
units
RS SR66 Silver Oxide 1.55V 25mAh Standard 6.8mm 6.8 x 2.6mm 0.4g
RS Stock No. 514-7700
BrandRS PRO
HK$9.57
Each (In a Pack of 5)
units
RS SR43 Silver Oxide 1.55V 120mAh Standard 11.6mm 11.6 x 4.2mm 1.6g
RS Stock No. 514-7716
BrandRS PRO
HK$7.72
Each (In a Pack of 5)
units
RS SR45 Silver Oxide 1.55V 60mAh Standard 9.5mm 9.5 x 3.6mm 0.9g
RS Stock No. 595-637
BrandRS PRO
HK$8.264
Each (In a Pack of 5)
units
RS SR48 Silver Oxide 1.55V 70mAh Standard 7.9mm 7.9 x 5.4mm 0.9g
RS Stock No. 593-439
BrandRS PRO
HK$9.576
Each (In a Pack of 5)
units
RS SR54 Silver Oxide 1.55V 70mAh Standard 11.6mm 11.6 x 3.05mm 1.3g
RS Stock No. 593-401
BrandRS PRO
HK$7.992
Each (In a Pack of 5)
units
RS SR41 Silver Oxide 1.55V 42mAh Standard 7.9mm 7.9 x 3.6mm 0.6g
RS Stock No. 514-7750
BrandRS PRO
HK$4.524
Each (In a Pack of 5)
units
RS SR60 Silver Oxide 1.55V 18mAh Standard 6.8mm 6.8 x 2.15mm 0.3g
RS Stock No. 595-659
BrandRS PRO
HK$5.874
Each (In a Pack of 5)
units
RS SR55 Silver Oxide 1.55V 40mAh Standard 11.6mm 11.6 x 2.1mm 0.9g
RS Stock No. 798-9405
BrandDuracell
HK$9.743
Each (In a Pack of 6)
units
Duracell EasyTab PR48 Zinc Air 1.4V - Standard 7.9mm 7.9 x 5.4mm -
RS Stock No. 798-9408
BrandDuracell
HK$8.358
Each (In a Pack of 6)
units
Duracell EasyTab PR70 Zinc Air 1.4V - Standard 5.8mm 5.8 x 3.6mm -
RS Stock No. 514-7722
BrandRS PRO
HK$4.50
Each (In a Pack of 5)
units
RS SR58 Silver Oxide 1.55V 24mAh Standard 7.9mm 7.9 x 2.1mm 0.4g
RS Stock No. 798-9391
BrandDuracell
HK$7.785
Each (In a Pack of 6)
units
Duracell EasyTab PR44 Zinc Air 1.4V - Standard 11.6mm 11.6 x 5.4mm -
New
RS Stock No. 183-9479
Mfr. Part No.BR-2032/F2N
BrandPanasonic
HK$40.92
Each
units
- - - - - - - - -
New
RS Stock No. 183-9480
Mfr. Part No.BR-2330/HFN
BrandPanasonic
HK$49.25
Each
units
- - - - - - - - -
RS Stock No. 494-2396
BrandRS PRO
HK$5.264
Each (In a Pack of 5)
units
RS SR63 Silver Oxide 1.55V 14mAh Standard 5.8mm 5.8 x 2.15mm 0.2g
New
RS Stock No. 183-9481
Mfr. Part No.BR-2330A/FAN
BrandPanasonic
HK$70.25
Each
units
- - - - - - - - -
RS Stock No. 494-2403
BrandRS PRO
HK$6.664
Each (In a Pack of 5)
units
RS SR57 Silver Oxide 1.55V 55mAh Standard 9.5mm 9.5 x 2.7mm 0.8g
RS Stock No. 801-0730
BrandRS PRO
HK$5.358
Each (In a Pack of 6)
units
RS PR44 Zinc Air 1.4V 300mAh Standard 11.6mm 11.6 x 5.4mm 1.6g