SR (Silver Oxide Battery)/LR (LR Button Battery)

Features (SR: Silver Oxide Battery)

Stable operating voltage and high capacity

Silver oxide and zinc are respectively used as the main positive electrode and negative electrode active materials, and the operating voltage is stable during discharge. It has high energy density per unit volume and can attain higher capacities than those of alkaline button batteries.

Superior load characteristics

Excellent load discharge characteristics are possible due to the adoption of an alkaline electrolyte.

The long-life low-drain type (SW), suitable for equipment that operates for long periods of time with light loads such as analog watches, and the high-drain type (W), suitable for equipment that is expected to be used for short periods of time with heavy loads such as medical equipment and multifunction digital watches with alarms and LED lights, are configured according to electrolyte composition.

Superior leakage^* resistance

Featuring Maxell's original leak-resistant processing, the SR battery has excellent leakage resistance, which suppresses the electrolyte from rising up and seeping out — a basic phenomenon of alkaline electrolytes.
(* Leakage is defined as an unintended escape of liquid from a battery.)

Excellent capacity retention rate

Original negative electrode material composition shows superior capacity retention rate. For the main models, the SR920SW, SR626SW, and SR621SW, an annual capacity deterioration rate of about 2% has been achieved for standard capacity.

Mercury-free

Although mercury was previously added to silver oxide batteries to prevent the degradation of battery performance, Maxell has realized superior leakage resistance without using mercury or lead, producing “mercury-free” batteries across all models, based on Maxell’s unique technology.

Consideration for the environment

All models of Maxell’s silver oxide batteries are manufactured without using mercury or lead as part of Maxell’s efforts to reduce its environmental impact. For this reason, these batteries comply with the EU Battery Directive.

Maxell has been developing "special specification" batteries in addition to their standard long-life low-drain type (SW) and high-drain type (W) to meet such market demands as long life and multi-functionalization, which in recent years are required for small electronic devices.

Special specification Long-life silver oxide battery

A special long-life silver oxide battery designed for long-life applications has about double the leakage resistance of long-life low-drain type (SW) standard models. For this reason, this model is especially suitable for equipment that is used for long periods of time.

Special specification High-drain type (developmental model)

The special high-drain type (developmental model) has about three times the load characteristics of high-drain (W) standard models. Consequently, it can be used for equipment that requires a higher current than previously required.

Specifications

Long-life low-drain(SW)

Model	Nominal Voltage (V)	Nominal Capacity (mAh)*	Nominal Discharge Current (µA)	Diameter (mm)	Height (mm)	Weight (g)	for Use	Warnings
SR44SW	1.55	165	200	11.6	5.4	2.2	Analog Watch Thermometer
SR43SW	1.55	125	100	11.6	4.2	1.7
SR1136SW	1.55	100	100	11.6	3.6	1.6
SR1130SW	1.55	83	100	11.6	3.05	1.2
SR1120SW	1.55	55	100	11.6	2.05	1.0
SR1116SW	1.55	29	50	11.6	1.65	0.7
SR936SW	1.55	71	100	9.5	3.6	1.1
SR927SW	1.55	55	100	9.5	2.73	0.8
		50
SR920SW	1.55	45	50	9.5	2.05	0.7
		35				0.6
SR916SW	1.55	26.5	50	9.5	1.65	0.5
SR914SW	1.55	22	35	9.5	1.45	0.45
SR41SW	1.55	45	50	7.9	3.6	0.7
SR731SW	1.55	36	50	7.9	3.1	0.7
SR726SW	1.55	33	50	7.9	2.6	0.5
SR721SW	1.55	25	30	7.9	2.1	0.45
SR716SW	1.55	23	30	7.9	1.68	0.3
SR712SW	1.55	10	20	7.9	1.29	0.25
SR626SW	1.55	30	30	6.8	2.6	0.4
		27
SR621SW	1.55	23	30	6.8	2.15	0.3
		18
SR616SW	1.55	16	20	6.8	1.65	0.3
		15
SR527SW	1.55	17	30	5.8	2.7	0.3
SR521SW	1.55	16	20	5.8	2.15	0.2
		13
SR516SW	1.55	12.5	20	5.8	1.65	0.2
SR512SW	1.55	5.5	5	5.8	1.25	0.14
SR421SW	1.55	12	20	4.8	2.15	0.17
SR416SW	1.55	8.3	10	4.8	1.65	0.12

High-drain type(W)

Model	Nominal Voltage (V)	Nominal Capacity (mAh)*	Nominal Discharge Current (µA)	Diameter (mm)	Height (mm)	Weight (g)	for Use	Warnings
SR44W	1.55	165	200	11.6	5.4	2.2	Digital Watch
SR43W	1.55	125	200	11.6	4.2	1.8
SR1130W	1.55	79	100	11.6	3.05	1.2
SR1120W	1.55	55	100	11.6	2.05	1.0
SR936W	1.55	75	100	9.5	3.6	1.1
SR927W	1.55	60	100	9.5	2.73	0.8
		57
SR920W	1.55	39	100	9.5	2.05	0.6
SR916W	1.55	23	50	9.5	1.65	0.5
SR41W	1.55	39	50	7.9	3.6	0.7
SR726W	1.55	28	50	7.9	2.6	0.5
SR721W	1.55	25	50	7.9	2.1	0.45
SR716W	1.55	18	30	7.9	1.68	0.3
SR626W	1.55	28	50	6.8	2.6	0.4
SR621W	1.55	18	50	6.8	2.15	0.3

＊Nominal capacity indicates the duration until the voltage drops to 1.2V when discharged at a nominal discharge current at 20 deg. C.

General use

Model	Nominal Voltage (V)	Nominal Capacity (mAh)*	Nominal Discharge Current (µA)	Diameter (mm)	Height (mm)	Weight (g)	for Use	Warnings
SR44	1.55	165	200	11.6	5.4	2.2
SR43	1.55	125	100	11.6	4.2	1.8
SR1130	1.55	79	100	11.6	3.05	1.2
SR1120	1.55	55	100	11.6	2.05	1.0
SR41	1.55	39	50	7.9	3.6	0.7

＊Nominal capacity indicates the duration until the voltage drops to 1.2V when discharged at a nominal discharge current at 20 deg. C.

LR Button Battery

Model	Nominal Voltage (V)	Nominal Capacity (mAh)*	Nominal Discharge Current (µA)	Diameter (mm)	Height (mm)	Weight (g)	for Use	Warnings
LR44	1.5	110	100	11.6	5.4	1.8
LR43		75			4.2	1.5
LR1130		45			3.05	1.2
LR1120		55			2.05	0.9
LR41		25	70	7.9	3.6	0.6

* Nominal capacity indicates the duration until the voltage drops to 1.2V when discharged at a nominal discharge current at 20 deg. C.

Construction (SR: Silver Oxide Battery)