SR43 battery
What replaces a SR43
386, 301, SR1142, SR43W, SR43SW, D386
1.55 V silver oxide, 11.6 × 4.2 mm (diameter × height)
The SR43 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
- SR43
- ANSI / NEDA
- 1133SO
- Nominal voltage
- 1.55 V
- Chemistry
- Silver oxide
- Size
- 11.6 × 4.2 mm (diameter × height)
- Typical capacity
- 120 mAh
- Rechargeable
- No — never charge it
Codes that mean the same battery
| Code | Fits? |
|---|---|
| 386 | Yes — same cell |
| 301 | Yes — same cell |
| SR1142 | Yes — same cell |
| SR43W | Yes — same cell |
| SR43SW | Yes — same cell |
| D386 | Yes — same cell |
| V386 | Yes — same cell |
| 1133SO | Yes — same cell |
| SB-A8 | Yes — same cell |
| MS76H | Yes — same cell |
Codes that look close but are not
| Code | Why it is not a substitute |
|---|---|
| LR43 / 186 / AG12 | Alkaline in the same can: 1.5 V, sloping, 123 mAh. Same physical fit, different voltage behaviour. |
| SR44 / 357 | Same diameter, 1.2 mm taller. It will not close an SR43 compartment. |
The SR43 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
- Vintage camera meters via an MR-9 voltage adapter
- Older quartz watches
- Medical and dental instruments
- Small electronic test gear
The cell that goes inside an MR-9 adapter to replace a PX625 mercury cell: the adapter drops its 1.55 V to the 1.35 V a vintage light meter expects.
Common questions
- What is equivalent to a SR43?
- 386, 301, SR1142, SR43W, SR43SW, D386, V386, 1133SO, SB-A8, MS76H — all the same 1.55 V cell under different manufacturer codes.
- Can I use a LR43 / 186 / AG12 instead of a SR43?
- Alkaline in the same can: 1.5 V, sloping, 123 mAh. Same physical fit, different voltage behaviour.
- Is the SR43 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