What is equivalent to a ICR16340?

RCR123A, 16340 Li-ion, ICR16340, LIR123A — all the same 3.6 V cell under different manufacturer codes.

Can I use a CR123A instead of a ICR16340?

The primary it replaces: 17 × 34.5 mm at 3.0 V and 1500 mAh, against 16 × 34 mm at 3.7 V and 650. The rechargeable is higher voltage and less than half the capacity. Many torches tolerate both, some are damaged by the extra volt, and no CR123A should ever meet a charger.

Is the ICR16340 rechargeable?

Yes. Use a charger made for its chemistry and never substitute a primary cell of the same size.

ICR16340 battery

What replaces a ICR16340

RCR123A, 16340 Li-ion, ICR16340, LIR123A

3.6 V lithium-ion (rechargeable), 16 × 34 mm (diameter × height)

The ICR16340 is a rechargeable 3.6 V lithium-ion (rechargeable) cylindrical. The codes below are the same physical cell sold under different manufacturer names, and any of them will fit.

Specification

IEC designation: ICR16340
Nominal voltage: 3.6 V
Chemistry: Lithium-ion (rechargeable)
Size: 16 × 34 mm (diameter × height)
Typical capacity: 650 mAh
Rechargeable: Yes

Codes that mean the same battery

Different manufacturers, one physical battery. Voltage, chemistry and dimensions all match.
Code	Fits?
RCR123A	Yes — same cell
16340 Li-ion	Yes — same cell
ICR16340	Yes — same cell
LIR123A	Yes — same cell

Codes that look close but are not

Code	Why it is not a substitute
CR123A	The primary it replaces: 17 × 34.5 mm at 3.0 V and 1500 mAh, against 16 × 34 mm at 3.7 V and 650. The rechargeable is higher voltage and less than half the capacity. Many torches tolerate both, some are damaged by the extra volt, and no CR123A should ever meet a charger.

Where it turns up

Compact rechargeable torches
Some security camera and doorbell packs
Laser sights
Small RC models

Genuine capacity runs 550–800 mAh. Wrappers claiming 1200 mAh or more in this size are misdescribed.

Common questions

What is equivalent to a ICR16340?: RCR123A, 16340 Li-ion, ICR16340, LIR123A — all the same 3.6 V cell under different manufacturer codes.
Can I use a CR123A instead of a ICR16340?: The primary it replaces: 17 × 34.5 mm at 3.0 V and 1500 mAh, against 16 × 34 mm at 3.7 V and 650. The rechargeable is higher voltage and less than half the capacity. Many torches tolerate both, some are damaged by the extra volt, and no CR123A should ever meet a charger.
Is the ICR16340 rechargeable?: Yes. Use a charger made for its chemistry and never substitute a primary cell of the same size.

LR6 battery 1.5 V alkaline
LR03 battery 1.5 V alkaline
ICR18650 battery 3.6 V lithium-ion (rechargeable)
LR20 battery 1.5 V alkaline
HR6 battery 1.2 V nickel-metal hydride
LR14 battery 1.5 V alkaline
CR17345 battery 3 V lithium (primary)
HR03 battery 1.2 V nickel-metal hydride
8LR932 battery 12 V alkaline
FR6 battery 1.5 V lithium (primary)
INR21700 battery 3.6 V lithium-ion (rechargeable)
4LR44 battery 6 V alkaline

Sources

Typical range compiled from manufacturer specifications — At One Place

How these figures are compiled and checked