Murata Watch Battery
with High Reliability
& Technical Performance
World's first mercury-free silver watch battery innovator, highly recognized as No. 1 market share manufacturer by major watch brands
Product Lineup
Murata Watch Battery with High Reliability & Technical Performance
Highly recognized as No. 1 market share manufacturer by major watch brands
Murata Watch Battery Features
Silver Oxide (SR) Battery with High Reliability & Technical Performance
Development of
the world's first mercury-free
silver oxide battery in 2004
Historically, mercury has been used in button batteries to reduce hydrogen gas generated inside the battery because the elimination of mercury was considered technically impossible. Murata undertook the challenge of designing mercury-free silver oxide batteries to contribute to the protection of the environment and consumers. Murata successfully introduced the world's first mercury-free silver oxide batteries in 2004 and went on to develop a mercury-free alkaline manganese button battery in 2009.
Unique manufacturing process
for strong anti-leakage performance
Murata's button batteries have superior anti-leakage performance thanks to its unique sealing material and technology. Our patented "J-shaped gasket" was invented as a unique sealing solution to maintain air pressure inside the battery. Optimization of the gasket shape results in the reduction of leakage risks during long-term storage.
Cumulative production
total of over 10 billion units
In 1977, Murata started its production of button batteries. We have achieved a cumulative production total of over 10 billion units during the period 1977 to 2017. Murata continues to focus our R&D efforts towards developing battery solutions which protect the environment while exceeding customer expectations for reliability and performance.
Product Lineup
Silver oxide batteries
(SR, 1.55V)
Product Lineup
Please flick and have a look.
| Thickness | Type | Diameter | |||||
|---|---|---|---|---|---|---|---|
| 4.8mm (0.189inch) |
5.8mm (0.228inch) |
6.8mm (0.268inch) |
7.9mm (0.311inch) |
9.5mm (0.374inch) |
11.6mm (0.457inch) |
||
| 1.2mm (0.049inch) |
Low Drain (NaOH) |
SR512SW (6mAh) |
SR712SW (9.5mAh) |
||||
| 1.4mm (0.057inch) |
Low Drain (NaOH) |
SR714SW (15mAh) |
|||||
| 1.6mm (0.065inch) |
Low Drain (NaOH) |
SR416SW (8.3mAh) |
SR516SW (11.5mAh) |
SR616SW (16mAh) |
SR716SW (23mAh) |
SR916SW (30mAh) |
|
| High Drain (KOH) |
SR1116 (30mAh) |
||||||
| 2.0mm (0.081inch) 2.1mm (0.083inch) |
Low Drain (NaOH) |
SR421SW (12.5mAh) |
SR521SW (16mAh) |
SR621SW (18mAh) |
SR721SW (25mAh) |
SR920SW (35mAh) |
|
| High Drain (KOH) |
SR721W (29mAh) |
SR920W (40mAh) |
SR1120 (60mAh) |
||||
| 2.6mm (0.102inch) 2.7mm (0.106inch) |
Low Drain (NaOH) |
SR527SW (22.5mAh) |
SR626SW (26mAh) |
SR726SW (35mAh) |
|||
| High Drain (KOH) |
SR626W (28mAh) |
SR726W (35mAh) |
SR927 (52mAh) |
||||
| 3.0mm (0.120inch) 3.1mm (0.122inch) |
Low Drain (NaOH) |
SR731SW (39mAh) |
|||||
| High Drain (KOH) |
SR1130 (85mAh) |
||||||
| 3.6mm (0.142inch) |
Low Drain (NaOH) |
SR936SW (70mAh) |
|||||
| High Drain (KOH) |
SR41 (45mAh) |
||||||
| 4.2mm (0.165inch) |
High Drain (KOH) |
SR43 (110mAh) |
|||||
| 5.4mm (0.213inch) |
High Drain (KOH) |
SR48 (75mAh) |
SR44 (160mAh) |
||||
Reference materials
Alkaline Manganese Batteries
(LR, 1.5V)
- Superior economic efficiency
- Positive electrode uses a comparatively inexpensive manganese dioxide for superior cost performance.
- Superior discharge stability
and heavy load pulse characteristics - Provides a stable discharge voltage even during momentary discharge of large currents.
- Superior leakage resistance
- Achieves superior leakage resistance
through Murata's unique sealant processing and sealing technology.
Product Lineup
| Thickness | Diameter | |
|---|---|---|
| 7.9mm (0.311inch) |
11.6mm (0.457inch) |
|
| 2.0mm (0.081inch) 2.1mm (0.083inch) |
LR1120 (45mAh) |
|
| 3.0mm (0.120inch) 3.1mm (0.122inch) |
LR1130 (70mAh) |
|
| 3.6mm (0.142inch) |
LR41 (45mAh) |
|
| 4.2mm (0.165inch) |
LR43 (110mAh) |
|
| 5.4mm (0.213inch) |
LR44 (120mAh) |
|
Coin Manganese Dioxide Lithium Batteries
(CR, 3V)
- Superior storage characteristics
- Features extremely low self-discharging through the careful selection of stable materials for the active material and electrolytic solution and our custom sealing technology. The amount of self-discharge at room temperature and normal humidity is less than 1% of the nominal capacity per year.
- Superior leakage resistance
- Demonstrates superior leakage resistance over the long-term through the adoption of our custom battery structure and electrolytic solution.
- UL-certified components
- Murata's coin-type manganese dioxide lithium batteries are UL-certified components.
(UL1642 File No. MH12566)
Product Lineup
Please flick and have a look.
| Thickness | Diameter | |||
|---|---|---|---|---|
| 12mm (0.492inch) |
16mm (0.63inch) |
20mm (0.787inch) |
24mm (0.965inch) |
|
| 1.6mm (0.063inch) |
CR1216 (30mAh) |
CR1616 (60mAh) |
CR2016 (90mAh) |
|
| 2.0mm (0.079inch) |
CR1220 (40mAh) |
CR1620 (80mAh) |
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| 2.5mm (0.098inch) |
CR2025 (160mAh) |
|||
| 3.0mm (0.118inch) |
CR2430 (300mAh) |
|||
| 3.2mm (0.126inch) |
CR1632 (140mAh) |
CR2032 (220mAh) |
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| 5.0mm (0.197inch) |
CR2450 (610mAh) |
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Packaging Design
-
5-pieces Blister Pack 
