Index / CR2

CR2

CR2 — lithium, 3 V, 15.6 x 27 mm. Current. CR15H270 takes the same slot at the same 3 V.

What fits the compartment, and what does not

Fit answers whether it enters the compartment. Voltage answers whether the circuit will notice. A cell that fits is not always a safe substitute.

One cell matches on both counts: CR15H270 is the same size and the same 3 V. The rest of the table trades depth for availability.

One straight swap, and what it changes

One cell in the data is the same size and current: CR15H270, 3 V against this one's 3 V, the same working voltage. Everything else at 15.6 x 27 mm is either unlisted or a different depth. It holds about 2400 milliwatt-hours, 800 mAh at 3 V.

Built for a load that alkaline cannot hold

Lithium is here for current, not for size. CR2 delivers 3 V and holds it under a load that would drag an alkaline cell of the same envelope down within seconds. Energizer publishes an operating range down to -40 C (-40 F) for this cell, which is the reason it turns up in outdoor and automotive equipment.

800 mAh in 5.2 cubic centimeters. Density is the whole argument for the chemistry, and it is why the compartment is small. CR15H270 shares this envelope in the Energizer data this site reads at a different voltage, so the compartment alone will not tell you which one the equipment expects. 1 cell measures close enough to compare against it in the Energizer data this site reads, and 1 of it is still listed.

• The nearest is CR15H270: it drops straight in and runs 3 V, same volts.
• By stored energy it stands 1 of 2 in its envelope, at 2400 milliwatt-hours.
• Energizer files it for Asia Pacific and Europe, which is where the part is sold rather than where the cell will work.
• The maker still lists it, under 1 product line: CR2.

Drawn to scale

Every published figure

10 figures are published, and one is not: impedance. The row is absent rather than estimated. It reaches shelves as CR2.

2 rows in the table are not the maker's but ours: stored energy and energy per cubic centimeter. Everything else is reproduced without change.

What the maker says about cold

The sheet for CR2 carries an operating range as well as a capacity, and it reaches -40 C (-40 F) at the cold end. 3 more published figures follow it, and none of them reaches a cross-reference table.

The part occupies 5.2 cubic centimeters and weighs 11 g. Capacity and voltage together put 2400 milliwatt-hours in that space. Energizer files it for Asia Pacific and Europe.

Operating range

-40 C (-40 F) to 60 C (140 F). Below the lower figure the maker makes no claim at all, which is not the same as the cell stopping.

Cutoff voltage

2 V. The published capacity is counted down to this voltage; a device that quits higher up sees less than the whole figure.

Mass against volume

11 g filling 5.2 cubic centimeters. When the printing has worn off, a kitchen scale separates two cells of one envelope faster than a caliper does.

Where the part is filed

Asia Pacific and Europe. That is a statement about the maker's distribution and not about where the cell works.

Is that a lot of energy?

It ties. 1 other cell in this shell stores the same 2400 milliwatt-hours, so they share place 1 of 2 instead of being put in an order the figures do not support. Per unit of volume that is 462 mWh per cubic centimeter, denser than 77% of everything measured here.

More energy per cubic centimeter than most

CR2 packs more into its volume than most of what is measured here: 462 milliwatt-hours per cubic centimeter, above 77 percent of the corpus.

1 of those one is still listed. Its 462 milliwatt-hours per cubic centimeter sit above 77 percent of everything here that publishes both a capacity and a volume. 3 of the 69 cylinders share its 3 V exactly.

• 3MR9 — the next step down by volume: 4.8 cubic centimeters against this cell's 5.2.
• 7LR44 — the next step up: 6.2 cubic centimeters, 119% of this one.
• 4NR43 — 15.2 x 20.5 mm, 6 V, mercuric oxide.
• CR15H270 — 15.6 x 27 mm, 3 V, lithium.

Nothing else is stamped on this one

Nothing else is printed on CR2 in the Energizer data this site reads: one designation, no trade marking, no part number. CR15H270 in the same envelope is named otherwise, so a marking you are holding is more likely theirs.

The cell that differs only in depth

The code says the size, so the cells that get confused with CR2 are the ones that keep its diameter and change its depth. 1 cell shares this diameter at 16.5 mm, and every one of them enters the same opening.

It stands 1 of 2 in this envelope by stored energy. On a scale the difference shows before it shows on a caliper: this one weighs 11 g.

• LR50 — same diameter, 16.5 mm tall against this cell's 27: 10.5 mm shallower, which neither designation carries.
• 4NR43 — 15.2 mm across at 6 V against 15.6 mm here, 0.4 mm apart: loose in this holder.
• MR50 — 16 mm across at 1.4 V against 15.6 mm here, 0.4 mm apart: too wide to enter in this holder.

One figure the maker does not publish

One field is empty for CR2: impedance. A blank means the maker publishes no figure, which is not the same as zero, and it is the reason one comparison below is missing rather than wrong.

The blanks are the same in all 1 record behind this designation, so they are the catalog's silence and not a merge losing a value. What is not missing is the envelope: 15.6 x 27 mm, published and checked against the designation itself.

• No impedance — so this page cannot tell you whether the cell can drive a pulse, which is the whole question in a watch or a sensor.

Before you swap anything

Everything here is computed from published dimensions and nominal voltages. That answers whether a cell enters the compartment and whether the voltage matches on paper. It does not answer what your device does with the difference, and it cannot: a cell that fits can still be the wrong cell.

One more limit, and it is the biggest. This site reads a single manufacturer’s catalog. When a page says a designation is not listed, that means Energizer no longer offers a part under it — not that nobody makes the cell. Other makers may still sell it, and for common sizes they usually do.

A voltage difference is one relation between two cells, and this page prints it from the cell it is about — in every table on the page, including the one listing cells no longer made. A figure always belongs to the cell whose voltage is printed beside it: a cell that runs lower than this one carries a minus here, one that runs higher carries a plus, and two cells at the same nominal voltage carry zero. Meet the same pair on the other cell’s page and the sign is the other one, with the figure taken against that cell instead of this one; where the two run at the same voltage, both pages print zero. The class beside the figure is not read off that figure directly. It is decided on the gap itself, taken against the higher of the two nominal voltages, so one pair of cells gets one class whichever page you meet it on: counted from this side the boundary of the class that still runs falls at 20.0% below and 25.0% above, which is the same gap divided once by the larger nominal and once by the smaller. What genuinely differs between the two directions is the consequence, and the words carry it: a cell that runs low makes a calibrated instrument read below true, and a cell that runs high makes it read above.

3 things this site cannot see. Whether the contacts reach a shorter cell. Whether the device was calibrated for a chemistry that holds its voltage flat, which silver oxide does and alkaline does not. Whether the equipment tolerates the higher current a different chemistry can deliver. Rechargeable cells are never a drop-in for primary cells regardless of size.

Cells measured next to this one

1 cell sits at exactly this size, and 1 more shares the diameter at other depths. The first group is interchangeable by measurement; the second is not.

• CR15H270 — 15.6 x 27 mm, 3 V
• LR50 — 15.8 x 16.5 mm, 1.5 V

Where these numbers come from

Dimensions, voltages, chemistries and capacities are published by the manufacturer and reproduced without change. Everything else on the page is ours, computed from those figures: whether one cell fits where another sat, how far apart their voltages are, stored energy and energy per cubic centimeter, the rank within a shell, and the check of the designation against the measured size.

Fit is decided within 0.3 mm on every axis, which is the order of a contact spring's travel. Voltage classes are decided by consequence, not by roundness, and they are decided on the gap between two nominal voltages taken against the higher of the two: 2.0% or less of it is the same working voltage, 6.0% starts to matter to a calibrated instrument, and past 20.0% it is a different class altogether. Measuring the gap against the higher figure is what makes the verdict the same from either cell’s page, while the printed percentage stays counted from the cell you are reading about. Cells with identical stored energy share a rank instead of being ordered arbitrarily.

Ranking uses capacity times nominal voltage, because capacity alone is not comparable across chemistries: 150 mAh at 3 V is twice the energy of 150 mAh at 1.5 V. Neighbors are chosen by measurement and never alphabetically, because two cells filed next to each other by name usually have nothing in common. A blank in any table means the maker publishes no figure, which is not the same as zero.

Source: Energizer technical data, retrieved 1 September 2026.

The record behind this page

Every figure on this page comes from one catalog record, number 1140, and it is linked below. The sheet is the document the dimensions, voltage and capacity were read out of.

1. [1] Energizer catalog record 1140, active in the snapshot. Technical data sheet: cr2_eu.pdf.

Every figure above is reproduced from those records without change; the comparisons are ours and are described on the method page. Snapshot: Energizer technical data, retrieved 1 September 2026.

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