SR721SW battery
What replaces a SR721SW
362, 361, SR58, SR721, SR721W, AG11
1.55 V silver oxide, 7.9 × 2.1 mm (diameter × height)
The SR721SW is a single-use 1.55 V silver oxide button cell. The codes below are the same physical cell sold under different manufacturer names, and any of them will fit.
Specification
- IEC designation
- SR721SW
- ANSI / NEDA
- 1158SO
- Nominal voltage
- 1.55 V
- Chemistry
- Silver oxide
- Size
- 7.9 × 2.1 mm (diameter × height)
- Typical capacity
- 27 mAh
- Rechargeable
- No — never charge it
Codes that mean the same battery
| Code | Fits? |
|---|---|
| 362 | Yes — same cell |
| 361 | Yes — same cell |
| SR58 | Yes — same cell |
| SR721 | Yes — same cell |
| SR721W | Yes — same cell |
| AG11 | Yes — same cell |
| D362 | Yes — same cell |
| V362 | Yes — same cell |
| 1158SO | Yes — same cell |
| GP362 | Yes — same cell |
| SB-BS | Yes — same cell |
Codes that look close but are not
| Code | Why it is not a substitute |
|---|---|
| LR721 / LR58 / 162 | Alkaline at 1.5 V with about half the capacity and a drooping voltage. |
| SR726SW / 397 | Same 7.9 mm diameter, 2.6 mm tall. Too tall for a 362 compartment. |
The SR721SW is a primary cell and must never be put in a charger. Charging a sealed primary battery builds gas pressure inside a can with no vent designed for it, which is how they rupture or catch fire. Rechargeable look-alikes exist for several sizes and carry different codes — check the code, not the shape.
Where it turns up
- Small quartz watch movements
- Digital thermometers
- Electronic organisers
- Slim calculators
Common questions
- What is equivalent to a SR721SW?
- 362, 361, SR58, SR721, SR721W, AG11, D362, V362, 1158SO, GP362, SB-BS — all the same 1.55 V cell under different manufacturer codes.
- Can I use a LR721 / LR58 / 162 instead of a SR721SW?
- Alkaline at 1.5 V with about half the capacity and a drooping voltage.
- Is the SR721SW rechargeable?
- No. It is a primary cell — charging one risks rupture or fire. Rechargeable look-alikes exist in the same size under different codes.
Related pages
- LR44 battery 1.5 V alkaline
- SR626SW battery 1.55 V silver oxide
- SR44 battery 1.55 V silver oxide
- PR41 battery 1.4 V zinc-air
- PR48 battery 1.4 V zinc-air
- SR621SW battery 1.55 V silver oxide
- PR44 battery 1.4 V zinc-air
- SR920SW battery 1.55 V silver oxide
- LR41 battery 1.5 V alkaline
- PR70 battery 1.4 V zinc-air
- SR927SW battery 1.55 V silver oxide
- LR1130 battery 1.5 V alkaline
Sources
- Official vendor product documentation — At One Place