315 - SR716SW Silver Oxide 1.55V Watch Battery | Energizer
MPN： 315 ✓ 啟用中315 概覽
Silver-oxide watch batteries (chemistry code SR) are primary non-rechargeable cells that use a zinc anode and silver-oxide cathode, with alkaline electrolyte. Compared with alkaline button cells (LR) or mercury cells (former H prefix), silver-oxide chemistry provides a flatter voltage plateau throughout the discharge cycle, which keeps the watch movement's step-motor drive amplitude constant and prevents the "end-of-life slowdown" that alkaline cells exhibit. The SR716SW family occupies the niche between the smaller SR621SW (6.8 mm) and the larger SR916SW (9.5 mm).
Key features include 1.55 V nominal voltage, 7.9 mm × 1.65 mm dimensions (per IEC 60086), leak-resistant sealed construction, and an operating temperature window of 0 °C to +60 °C. Capacity is approximately 22 mAh (per Energizer watch-cell datasheets), with a typical continuous drain of 30 µA at 1.5 V end-point for analog quartz movements. Shelf life is rated up to 5 years at +20 °C storage.
Common alias part numbers include SR716SW, SR67, SR716, V315, D315, B315L, 530, 280-56, SB-AT, 614, HA, and the IEC code SR67. All share identical dimensions and voltage; only capacity may vary slightly between brands due to cathode formulation differences.
Typical applications include analog quartz wristwatches, small digital timepieces, calculator backup cells, glucometer RTC backup, and low-power CMOS logic RTC retention. The thin 1.65 mm profile makes it the standard cell for slim dress watches with case thickness under 5 mm.
Avoid mixing silver-oxide and alkaline watch cells in the same device - their voltage profiles differ and may cause erratic stepping. Store unused cells in original blister packaging to preserve shelf life and prevent inadvertent short-circuit on metal surfaces.
This page consolidates the manufacturer-published cell dimensions, the cross-reference equivalency map, and known drop-in equivalents across brands not found in a single manufacturer datasheet.
直接替換替代品，適用於 315 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
315
✅ 直接替換聯絡詢價
查看資料表 →SR716SW
✅ 直接替換📋 參考替代品（不在目錄中）
V315
✅ 直接替換📋 參考替代品（不在目錄中）
D315
✅ 直接替換📋 參考替代品（不在目錄中）
SR716SW
✅ 直接替換📋 參考替代品（不在目錄中）
SR716SW
✅ 直接替換📋 參考替代品（不在目錄中）
315 規格
| Chemistry | Silver Oxide (Zn/Ag2O) |
| Nominal Voltage | 1.55 V |
| IEC Designation | SR67 (industry alias SR716SW) |
| Diameter | 7.9 mm |
| Height | 1.65 mm |
| Capacity (typical) | 22 mAh |
| Continuous Drain (typical) | 30 µA |
| 工作溫度 | 0 °C to +60 °C |
| Storage Temperature | -20 °C to +45 °C |
| Shelf Life | 5 years (at +20 °C) |
| Form Factor | Button cell (coin) |
| Rechargeable | No (primary cell) |
| Equivalent Codes | SR716SW, SR67, SR716, V315, D315, 530, 280-56, SB-AT, 614, HA |
| 安裝類型 | Press-fit (cell holder) |
| RoHS 狀態 | Compliant |
315 standard 腳位配置指南
315（standard 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： 315.
請參閱 資料表 以查看完整腳位配置。
典型應用
315 適用於 6 應用s: Analog Quartz Wristwatch, Digital Watch Backup Cell, Calculator and Organizer RTC Backup, Glucometer and Medical Device Backup, CMOS Logic RTC Retention, Hearing Aid and Assistive Device Power.
Analog Quartz Wristwatch
The Energizer 315 (SR716SW) is the de facto standard power source for thin analog quartz wristwatches. With 1.55 V nominal and 22 mAh typical capacity, it sustains the 32 kHz quartz crystal oscillator and bipolar step-motor drive for 2-3 years per cell. The 7.9 × 1.65 mm dimensions fit dress watches with case thickness under 5 mm where larger 9.5 mm cells like SR916SW will not seat. Silver-oxide chemistry's flat voltage plateau (versus sloping alkaline discharge) keeps motor drive amplitude constant, preventing the late-life slowing visible with cheaper LR cells. Pair with a Renata 315 or Maxell SR716SW equivalent for OEM service replacements.
推薦
Digital Watch Backup Cell
The 315 cell also powers low-power digital LCD watches with simple time/date display. Continuous drain is typically 5-10 µA, so the 22 mAh capacity delivers 2-4 years of service. The flat discharge curve maintains LCD contrast throughout cell life, where alkaline cells would dim gradually. Not suitable for high-drain digital watches with backlight, alarm, or chronograph - those need SR716W high-drain variant. Verify the watch movement's specified chemistry; some Seiko and Casio modules require SR-only cells to maintain calibration.
推薦
Calculator and Organizer RTC Backup
Vintage calculators, PDAs, and electronic organizers used the 315 (SR716SW) as a backup cell for retaining RAM and clock settings when main batteries were removed for replacement. The 1.55 V cell provides continuous 5-15 µA trickle drain to RTC and CMOS SRAM, preserving memory for 3-5 years. Modern equivalents include the BR-1225 lithium backup, but legacy Sharp, Casio, and HP organizers from the 1990s-2000s specified the 315. Substitute only with same-chemistry silver-oxide to avoid alkaline leakage damage to the PCB.
推薦
Glucometer and Medical Device Backup
Some portable medical devices (glucometers, blood pressure monitors, pill dispensers) use the 315 cell as RTC backup to retain time/date stamps and last-reading memory when primary AA/AAA batteries are swapped. The 1.55 V silver-oxide chemistry is preferred over alkaline because flat discharge prevents clock drift that could mis-stamp medical readings. Capacity of 22 mAh is sufficient for 2-3 year backup duty. Cross-reference equivalents (SR716SW, V315, D315) from medical-grade suppliers like Renata meet device reliability requirements.
推薦
CMOS Logic RTC Retention
The 315 cell is occasionally used as a backup supply for low-power CMOS logic RTC chips in industrial controllers and instrumentation. The 1.55 V output is sufficient to maintain oscillator and RAM when main 3.3 V or 5 V rail is removed for service. Capacity of 22 mAh provides months of backup for typical 1-3 µA RTC drain. For new designs, prefer lithium cells like BR-1225 or BR-1632 for wider temperature range; the 315 is reserved for legacy systems with established mechanical holders.
推薦
Hearing Aid and Assistive Device Power
Older analog and early digital hearing aids used the 315 (SR716SW) as primary power before zinc-air 675/13 became standard. Some slim in-ear models retain the 315 for its compact 1.65 mm profile. Capacity of 22 mAh supports 5-7 days of 16-hour daily use at 1-2 mA average drain. Modern hearing aids use zinc-air chemistry for higher energy density, but legacy devices and tinnitus-masker units still specify the 315. Substitute only with same silver-oxide chemistry; alkaline equivalents reduce service life by ~40%.
推薦
推薦產品摘要
工程參考資料，適用於 315 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | 315 | SR716SW | V315 | D315 | SR716SW |
|---|---|---|---|---|---|---|
| Brand | Energizer | Renata | Maxell | Varta | Duracell | Sony |
| Package | Button cell 7.9x1.65 mm | Button cell 7.9x1.65 mm - same | Button cell 7.9x1.65 mm - same | Button cell 7.9x1.65 mm - same | Button cell 7.9x1.65 mm - same | Button cell 7.9x1.65 mm - same |
| Nominal Voltage | 1.55 V | 1.55 V | 1.55 V | 1.55 V | 1.55 V | 1.55 V |
| Chemistry | Silver Oxide | Silver Oxide | Silver Oxide | Silver Oxide | Silver Oxide | Silver Oxide |
| Diameter | 7.9 mm | 7.9 mm | 7.9 mm | 7.9 mm | 7.9 mm | 7.9 mm |
| Height | 1.65 mm | 1.65 mm | 1.65 mm | 1.65 mm | 1.65 mm | 1.65 mm |
| Capacity (typical) | 22 mAh | 23 mAh | 22 mAh | 21 mAh | 22 mAh | 20 mAh |
| IEC Code | SR67 / SR716SW | SR67 / SR716SW | SR67 / SR716SW | SR67 / SR716SW | SR67 / SR716SW | SR67 / SR716SW |
主要差異化特點
- Wide cross-reference availability across multiple brands (對比SR716SW (Maxell))
- Watchmaker-preferred equivalent exists (對比Renata 315)
- Higher capacity versus legacy alkaline equivalents (對比LR716 (alkaline))
設計說明
Do not substitute silver-oxide 315 with alkaline LR716 - although dimensions match (7.9 × 1.65 mm), the alkaline cell's sloping discharge curve causes watch movements to gradually slow as the cell depletes. Silver-oxide maintains a flat ~1.55 V plateau to end-of-life, keeping timekeeping accuracy consistent. Watchmakers report 30-40% service life reduction with alkaline substitutions.
Always install the 315 cell with the + terminal facing up into the cell holder. The flat top side (marked with cell code '315') is positive; the bottom with the case crimp seam is negative. Reverse polarity can permanently damage the quartz movement's CMOS IC. Verify polarity markings on the cell holder clip before insertion.
Estimated: a 22 mAh 315 cell powering a 2 µA continuous drain analog quartz movement provides approximately 11,000 hours or 3 years of service life (22 mAh / 0.002 mA = 11,000 h). Actual life varies with temperature, pulse current from step-motor actuation, and self-discharge (~1-2% per year). Always specify a fresh cell with at least 4 years of remaining shelf life for service.
合規資訊
RoHS compliant per Energizer product specifications. Not applicable for AEC-Q100 (consumer button cell). Contains no lead or mercury per IEC 60086 silver-oxide standards.
