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庫存編號 593-423
BrandRS PRO
HK$13.576
/個 (每包:5個)
單位
- SR44 - Silver Oxide 1.55V 165mAh Standard 11.6mm 11.6 x 5.4mm -
RS庫存編號 775-7233
BrandRS PRO
HK$4.916
/個 (每包:5個)
單位
- LR44 - Alkaline 1.5V 158mAh Standard 11.53mm 11.53 x 5.43mm -
RS庫存編號 514-7766
BrandRS PRO
HK$4.444
/個 (每包:5個)
單位
- SR66 - Silver Oxide 1.55V 25mAh Standard 6.8mm 6.8 x 2.6mm -
RS庫存編號 514-7700
BrandRS PRO
HK$10.736
/個 (每包:5個)
單位
- SR43 - Silver Oxide 1.55V 120mAh Standard 11.6mm 11.6 x 4.2mm -
RS庫存編號 514-7716
BrandRS PRO
HK$9.27
/個 (每包:5個)
單位
- SR45 - Silver Oxide 1.55V 60mAh Standard 9.5mm 9.5 x 3.6mm -
RS庫存編號 595-637
BrandRS PRO
HK$8.80
/個 (每包:5個)
單位
- SR48 - Silver Oxide 1.55V 70mAh Standard 7.9mm 7.9 x 5.4mm -
RS庫存編號 593-439
BrandRS PRO
HK$11.57
/個 (每包:5個)
單位
- SR54 - Silver Oxide 1.55V 70mAh Standard 11.6mm 11.6 x 3.05mm -
RS庫存編號 595-659
BrandRS PRO
HK$7.604
/個 (每包:5個)
單位
- SR55 - Silver Oxide 1.55V 40mAh Standard 11.6mm 11.6 x 2.1mm -
RS庫存編號 514-7750
BrandRS PRO
HK$5.936
/個 (每包:5個)
單位
- SR60 - Silver Oxide 1.55V 18mAh Standard 6.8mm 6.8 x 2.15mm -
RS庫存編號 593-401
BrandRS PRO
HK$14.13
/個 (每包:5個)
單位
- SR41 - Silver Oxide 1.55V 42mAh Standard 7.9mm 7.9 x 3.6mm -
RS庫存編號 798-9391
BrandDuracell
HK$9.455
/個 (每包:6個)
單位
- PR44 - Zinc Air 1.4V - Standard 11.6mm 11.6 x 5.4mm -
RS庫存編號 798-9405
BrandDuracell
HK$8.788
/個 (每包:6個)
單位
- PR48 - Zinc Air 1.4V - Standard 7.9mm 7.9 x 5.4mm -
RS庫存編號 798-9408
BrandDuracell
HK$8.358
/個 (每包:6個)
單位
- PR70 - Zinc Air 1.4V - Standard 5.8mm 5.8 x 3.6mm -
RS庫存編號 514-7722
BrandRS PRO
HK$4.05
/個 (每包:5個)
單位
- SR58 - Silver Oxide 1.55V 24mAh Standard 7.9mm 7.9 x 2.1mm -
全新
RS庫存編號 188-1986
製造零件編號20384903501
BrandVarta
HK$10.318
/個 (每包:1000個)
單位
20384 SR41 - NaOH Electrolyte, Silver Oxide, Zinc 1.55V 37mAh - 7.9mm 7.9 Dia. x 3.6mm V MF
RS庫存編號 866-0663
BrandRS PRO
HK$3.122
/個 (每包:5個)
單位
- CR2025 - Lithium Manganese Dioxide 3V 160mAh Standard 20mm 20 x 2.5mm -
全新
RS庫存編號 188-1987
製造零件編號20389903501
BrandVarta
HK$15.268
/個 (每包:1000個)
單位
20389 SR54 - KOH Electrolyte, Silver Oxide, Zinc 1.55V 81mAh - 11.6mm 11.6 Dia. x 3.1mm V MF
全新
RS庫存編號 188-1988
製造零件編號20393903501
BrandVarta
HK$11.077
/個 (每包:500個)
單位
20393 SR48 - KOH Electrolyte, Silver Oxide, Zinc 1.55V 77mAh - 7.9mm 7.9 Dia. x 5.4mm V MF
RS庫存編號 801-0721
BrandRS PRO
HK$6.232
/個 (每包:6個)
單位
- PR41 - Zinc Air 1.4V 175mAh Standard 7.9mm 7.9 x 3.6mm -
RS庫存編號 183-9479
製造零件編號BR-2032/F2N
BrandPanasonic
HK$32.74
單位
- BR2032 - Lithium Polycarbon Monofluoride 3V 200mAh - 20mm 20 (Dia.) x 3.2mm BR