Maxell SR Series Silver Oxide Battery

Maxell SR Series Silver Oxide Battery Button-type silver oxide batteries are characterized by high energy per unit volume and stable operating voltage. As a result, they are used as a power source for applications such as quartz watches, and in recent years their use has expanded to medical devices and BLE devices.

Maxell is the first company in Japan to successfully market button-type silver oxide batteries and has many years of experience and know-how. Also, in consideration of the environment, all products are designed to use zero mercury. For more information, please contact Maxell.

The button-type silver oxide battery uses silver oxide (Ag2O) as its positive active material and zinc (Zn) as its negative active material. Potassium hydroxide (KOH) (W-type) or sodium hydroxide (NaOH) (SW-type) is used as an electrolyte.

Features

Features (SR: Silver Oxide Battery)
Stable discharge characteristics
A discharge curve during discharge supplies a stable voltage until the end of the discharge life.
High-energy density
A silver oxide battery’s high-energy density per unit volume provides approx. twice the amount of energy capacity as button-type alkaline batteries.
Excellent discharge load characteristics
Alkaline electrolyte is used to provide excellent discharge load characteristics. Depending on the composition of the electrolyte, two models are available; a low-drain type (SW type) for analog watches and a high-drain type (W type) for multi-function watches (which incorporate an alarm and a light), medical equipment, etc.
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.)
Taking environment in consideration
As one of its measures to reduce the environmental impact, Maxell draws upon its original technology to realize longer-lasting, superior leakage-resistant characteristics without using mercury and lead.

Applications

Analog watches
Digital watches
Measuring instruments
Calculators
Medical instruments
BLE devices

Specifications

Model	Nominal Voltage (V)	Nominal Capacity (mAh)*	Nominal Discharge Current (µA)	Diameter (mm)	Height (mm)	Weight (g)	for Use
SR44W	1.55	165	200	11.6	5.4	2.2	High drain type [Use] 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
SR927W	1.55	57	100	9.5	2.73	0.8
SR920W	1.55	39	100	9.5	2.05	0.6
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	2.15	0.5
SR626W	1.55	28	50	6.8	2.6	0.4
SR621W	1.55	18	50	6.8	2.15	0.3
SR44SW	1.55	165	200	11.6	5.4	2.2	Low drain type Long life[Use] 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
SR927SW	1.55	50	100	9.5	2.73	0.8
SR920SW	1.55	45	50	9.5	2.05	0.7
SR920SW	1.55	35	50	9.5	2.05	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	0.5
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
SR626SW	1.55	27	30	6.8	2.6	0.4
SR621SW	1.55	23	30	6.8	2.15	0.3
SR621SW	1.55	18	30	6.8	2.15	0.3
SR616SW	1.55	16	20	6.8	1.65	0.3
SR616SW	1.55	15	20	6.8	1.65	0.3
SR527SW	1.55	17	30	5.8	2.7	0.3
SR521SW	1.55	16	20	5.8	2.15	0.2
SR521SW	1.55	13	20	5.8	2.15	0.2
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
SR44	1.55	165	200	11.6	5.4	2.2	General use
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.

Downloads

Datasheet: Maxell LR,SR Series Button Battery

Maxell SR Series Silver Oxide Battery