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
Murata Watch Battery with High Reliability & Technical Performance
Widely recognized by major watch brands as the top manufacturer with the highest market share
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 was used in button batteries to reduce the levels of hydrogen gas inside the battery and for a long time, the elimination of this mercury was considered technically impossible. Driven by a desire to improve standards of enivornmental and consumer protection, Murata undertook the challenge of designing mercury-free silver oxide batteries in the early 2000s. 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 and over the following four decades, we achieved a cumulative production total of over 10 billion units. Murata continues to focus our R&D efforts towards developing battery solutions which protect the environment while exceeding customer expectations for reliability and performance.
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) |
||
| 2.5mm (0.098inch) |
CR2025 (160mAh) |
|||
| 3.0mm (0.118inch) |
CR2430 (300mAh) |
|||
| 3.2mm (0.126inch) |
CR1632 (140mAh) |
CR2032 (220mAh) |
||
| 5.0mm (0.197inch) |
CR2450 (610mAh) |
|||
Packaging Design
-
5-pieces Blister Pack 
-
10-pieces Box 
