What is equivalent to a CRV3?

CR-V3, CRV3, 5047LC, LB-01, RCR-V3 (rechargeable — see below), K3ALPS — all the same 3 V cell under different manufacturer codes.

Can I use a Two AA cells instead of a CRV3?

It occupies the same space as two AAs and slots into the same compartment on many cameras, but delivers 3 V from one lithium block rather than 3 V from two 1.5 V cells in series. Where a camera lists both, either works. Where it lists only AA, check the manual before assuming.

Is the CRV3 rechargeable?

No. It is a primary cell — charging one risks rupture or fire. Rechargeable look-alikes exist in the same size under different codes.

CRV3 battery

What replaces a CRV3

CR-V3, CRV3, 5047LC, LB-01, RCR-V3 (rechargeable — see below), K3ALPS

3 V lithium (primary), 52.2 × 28.05 × 14.15 mm

The CRV3 is a single-use 3 V lithium (primary) pack. The codes below are the same physical cell sold under different manufacturer names, and any of them will fit.

Specification

IEC designation: CRV3
ANSI / NEDA: 5047LC
Nominal voltage: 3 V
Chemistry: Lithium (primary)
Size: 52.2 × 28.05 × 14.15 mm
Typical capacity: 3000 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?
CR-V3	Yes — same cell
CRV3	Yes — same cell
5047LC	Yes — same cell
LB-01	Yes — same cell
RCR-V3 (rechargeable — see below)	Yes — same cell
K3ALPS	Yes — same cell

Codes that look close but are not

Code	Why it is not a substitute
Two AA cells	It occupies the same space as two AAs and slots into the same compartment on many cameras, but delivers 3 V from one lithium block rather than 3 V from two 1.5 V cells in series. Where a camera lists both, either works. Where it lists only AA, check the manual before assuming.
RCR-V3	The rechargeable lithium-ion version at 3.6 V. Never put a CR-V3 primary on an RCR-V3 charger.

The CRV3 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

Kodak EasyShare and Olympus digital cameras
Trail and game cameras
Older Nikon Coolpix bodies
Some film point-and-shoots

Common questions

What is equivalent to a CRV3?: CR-V3, CRV3, 5047LC, LB-01, RCR-V3 (rechargeable — see below), K3ALPS — all the same 3 V cell under different manufacturer codes.
Can I use a Two AA cells instead of a CRV3?: It occupies the same space as two AAs and slots into the same compartment on many cameras, but delivers 3 V from one lithium block rather than 3 V from two 1.5 V cells in series. Where a camera lists both, either works. Where it lists only AA, check the manual before assuming.
Is the CRV3 rechargeable?: No. It is a primary cell — charging one risks rupture or fire. Rechargeable look-alikes exist in the same size under different codes.

Pouch cell (no size designation) battery 3.7 V lithium-ion (rechargeable)
CR2032 battery 3 V lithium (primary)
LR6 battery 1.5 V alkaline
LR03 battery 1.5 V alkaline
6LR61 battery 9 V alkaline
LR44 battery 1.5 V alkaline
CR2025 battery 3 V lithium (primary)
ICR18650 battery 3.6 V lithium-ion (rechargeable)
SR626SW battery 1.55 V silver oxide
LR20 battery 1.5 V alkaline
HR6 battery 1.2 V nickel-metal hydride
LR14 battery 1.5 V alkaline

Sources

Official vendor product documentation — At One Place

How these figures are compiled and checked