High Quality
We have succeeded in realizing better leakage resistance and storage
stability than the silver oxide battery containing mercury by developing
and applying the technology of making ultra precise small-size parts,
which we have cultivated for years through watches, into the
highly-accurate surface treatment technology for the negative collector.
This technology is the key technology in developing the mercury-free
silver oxide battery. Production will be done by a state-of-the art
production equipment in the newly built high-tech plant. The production
equipment has been placed into the cleanroom, which is the same
manufacturing environment as ultra precise electronic devices,
thoroughly eliminating contamination and producing mercury-free silver
oxide batteries with minimum quality variation.
Advanced Technology
Up to now, a small amount of mercury was included in the silver oxide
battery. Mercury is a substance that suppresses the corrosion of zinc,
which is a negative electrode active material. This substance suppresses
the generation of hydrogen gas, which occurs by the corrosion of zinc. If
the hydrogen gas generates, leakage resistance and storage stability will
deteriorate and at times, the battery will swell.
We developed 3 new technologies in order to overcome the problem of
removing mercury from silver oxide battery:
1. Anti-corrosion treatment of anode cap collector surface.
2. Use of high-corrosion resistant zinc alloy.
3. Addition of high-performance inhibitor in the electrolyte.
Mercury-free & Lead-free
According to the EU battery directive, the marketing of alkaline
manganese batteries containing more than 0.025% of mercury
by weight is prohibited. This is because mercury has hazardous
effect on the human health and environment. However, button
cells have been exempted from this prohibition because it has
been technically difficult for battery manufacturers to develop
silver oxide battery without mercury. We have overcome this
difficulty with our new SPRON battery. Furthermore, gradual
reduction and separate disposal of batteries containing more
than 0.4% lead by weight was one of the objectives held by the
member states of EU. These objectives have also been
achieved by SII.
Features
Ecology
We have eliminated mercury and lead, which are environmentally
harmful substances, from our batteries with the special surface
treatment of the anode cap collector surface and addition of
new materials into the cathode mixture. (Patent pending)
Excellent leakage resistance
Despite being mercury-free, these batteries are manufactured
to have excellent leakage resistance, attained by the adoption of
a new crimping structure and introduction of high-performance
crimping machines. (Patent pending)
High reliability
Production in a clean room, which is the same environment used
to manufacture ultra precise electronic devices, thoroughly
prevents contamination, thus achieving high reliability.
Wide temperature range
Adoption of high-performance electrolyte achieved excellent
characteristics over a wide temperature range of -20℃ to +60℃.
(Patent pending)
| Type |
UCAR No. |
Electrical (atRoomTemp.) Nominal Voltage (V) |
Electrical (atRoomTemp.) Nominal Capacity*1 (mAh) |
Dimensions Diameter (mm) |
Dimensions Height (mm) |
Weight (g) |
C.C.V. (TYP.)*2 +24ºC(V) |
C.C.V. (TYP.)*2 -10ºC(V) |
|
| Low | SR416SW | 337 | 1.55 | 7.5 | 4.8 | 1.65 | 0.11 | 1.35 | 1.1 |
| Low | SR421SW | 348 | 1.55 | 12.0 | 4.8 | 2.15 | 0.14 | 1.35 | 1.1 |
| Low | SR516SW | 317 | 1.55 | 12.5 | 5.8 | 1.65 | 0.18 | 1.45 | 1.1 |
| Low | SR521SW | 379 | 1.55 | 16.0 | 5.8 | 2.15 | 0.23 | 1.45 | 1.1 |
| Low | SR527SW | 319 | 1.55 | 22.0 | 5.8 | 2.70 | 0.29 | 1.45 | 1.1 |
| Low | SR616SW | 321 | 1.55 | 16.0 | 6.8 | 1.65 | 0.25 | 1.45 | 1.1 |
| Low | SR621SW | 364 | 1.55 | 23.0 | 6.8 | 2.15 | 0.32 | 1.45 | 1.2 |
| Low | SR626SW | 377 | 1.55 | 30.0 | 6.8 | 2.60 | 0.39 | 1.45 | 1.2 |
| Low | SR716SW | 315 | 1.55 | 23.0 | 7.9 | 1.65 | 0.33 | 1.45 | 1.2 |
| Low | SR721SW | 362 | 1.55 | 28.0 | 7.9 | 2.10 | 0.42 | 1.45 | 1.2 |
| Low | SR726SW | 397 | 1.55 | 34.0 | 7.9 | 2.60 | 0.52 | 1.45 | 1.2 |
| Low | SR731SW | 329 | 1.55 | 40.0 | 7.9 | 3.10 | 0.56 | 1.45 | 1.2 |
| Low | SR41SW | 384 | 1.55 | 45.0 | 7.9 | 3.60 | 0.67 | 1.45 | 1.2 |
| Low | SR916SW | 373 | 1.55 | 27.0 | 9.5 | 1.65 | 0.51 | 1.45 | 1.2 |
| Low | SR920SW | 371 | 1.55 | 46 | 9.5 | 2.05 | 0.6 | 1.45 | 1.20 |
| Low | SR927SW | 395 | 1.55 | 60.0 | 9.5 | 2.70 | 0.75 | 1.45 | 1.2 |
| Low | SR936SW | 394 | 1.55 | 85.0 | 9.5 | 3.60 | 1.10 | 1.45 | 1.2 |
| Low | SR1120SW | 381 | 1.55 | 53.0 | 11.6 | 2.05 | 0.93 | 1.45 | 1.2 |
| Low | SR1130SW | 390 | 1.55 | 80.0 | 11.6 | 3.05 | 1.29 | 1.45 | 1.2 |
| Low | SR43SW | 301 | 1.55 | 120.0 | 11.6 | 4.20 | 1.75 | 1.45 | 1.2 |
| Low | SR44SW | 303 | 1.55 | 160.0 | 11.6 | 5.40 | 2.20 | 1.45 | 1.2 |
| High | SR626W | 376 | 1.55 | 30.0 | 6.8 | 2.60 | 0.39 | 1.35 | 1.0 |
| High | SR721W | 361 | 1.55 | 26.0 | 7.9 | 2.10 | 0.41 | 1.35 | 1.05 |
| High | SR726W | 396 | 1.55 | 34.0 | 7.9 | 2.60 | 0.52 | 1.35 | 1.05 |
| High | SR41W | 392 | 1.55 | 45.0 | 7.9 | 3.60 | 0.67 | 1.35 | 1.15 |
| High | SR920W | 370 | 1.55 | 46 | 9.5 | 2.05 | 0.6 | 1.4 | 1.10 |
| High | SR927W | 399 | 1.55 | 60.0 | 9.5 | 2.70 | 0.75 | 1.40 | 1.2 |
| High | SR1120W | 391 | 1.55 | 53.0 | 11.6 | 2.05 | 0.93 | 1.40 | 1.2 |
| High | SR1130W | 389 | 1.55 | 80.0 | 11.6 | 3.05 | 1.29 | 1.40 | 1.2 |
| High | SR43W | 386 | 1.55 | 120.0 | 11.6 | 4.20 | 1.75 | 1.45 | 1.2 |
| High | SR44W | 357 | 1.55 | 160.0 | 11.6 | 5.40 | 2.20 | 1.45 | 1.2 |
*1. Discharged to 1.2V
*2. C.C.V. : Closed Circuit Voltage Low Drain 2kΩ 7.8msec Pulse High Drain 200Ω 5sec. DC
