At One Place

LR43 battery

What replaces a LR43
186, AG12, LR1142, L1142, V12GA, GP186
1.5 V alkaline, 11.6 × 4.2 mm (diameter × height)

The LR43 is a single-use 1.5 V alkaline button cell. The codes below are the same physical cell sold under different manufacturer names, and any of them will fit.

Specification

IEC designation
LR43
Nominal voltage
1.5 V
Chemistry
Alkaline
Size
11.6 × 4.2 mm (diameter × height)
Typical capacity
123 mAh
Rechargeable
No — never charge it

Codes that mean the same battery

Different manufacturers, one physical battery. Voltage, chemistry and dimensions all match.
Code Fits?
186 Yes — same cell
AG12 Yes — same cell
LR1142 Yes — same cell
L1142 Yes — same cell
V12GA Yes — same cell
GP186 Yes — same cell
G12A Yes — same cell
301A Yes — same cell
386A Yes — same cell

Codes that look close but are not

Code Why it is not a substitute
SR43 / 386 Silver oxide in the same can, 1.55 V flat.
LR44 Same diameter, 1.2 mm taller. Easy to buy by mistake and it will not close the compartment.

The LR43 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

  • Medical and dental instruments
  • Older calculators
  • Small toys
  • Electronic test gear

Common questions

What is equivalent to a LR43?
186, AG12, LR1142, L1142, V12GA, GP186, G12A, 301A, 386A — all the same 1.5 V cell under different manufacturer codes.
Can I use a SR43 / 386 instead of a LR43?
Silver oxide in the same can, 1.55 V flat.
Is the LR43 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

Sources

  1. Official vendor product documentation — At One Place

How these figures are compiled and checked