Index / Shell 14.5 x 50.5 mm / LR6

LR6 battery equivalent: what to use instead

LR6 alkaline battery — 1.5 V, 14.5 x 50.5 mm, known as an AA battery. LR6 batteries of any brand are this same cell, and so is a pack sold as an MN1500 battery or an AM3 battery. FR14505 and FR6 take the same slot at the same 1.5 V; R6 drops straight in, and runs the same 1.5 V, and it is carbon zinc, which holds far less; HR6 drops straight in, and runs 1.2 V — -20.0%, which reads low, and it is rechargeable, never a drop-in. Battery equivalent chart for every other code.

What fits the compartment, and what does not

LR6 battery equivalent chart: candidates for an LR6 battery replacement, one row each. Fit answers whether it enters the compartment. Voltage answers whether the circuit will notice. A cell that fits is not always a safe substitute.

4 cells drop in and they are not equivalent: of those, HR6 sits furthest at -20.0% of this cell’s 1.5 V, low enough that a calibrated instrument reads below true.

Also stamped 15A, A91V, AX91, E91, E91 ALKALINE POWER, EN91, X91, XR91, A91, EP91, EA91, EPA91

Same cell, other names on the package

LR6 answers to 2 markings outside the standard: MN1500 and AM3. They are retail house numbers, and no standards body stands behind any of them, which is why none is printed under Also stamped above.

The maker's own catalog carries 13 product lines under it. A manual that reads “Battery: LR6” names this cell by its IEC designation, and the L in front is the chemistry, alkaline manganese dioxide.

• MN1500 — a retail trade marking, not an IEC designation; MN1500 batteries are this cell, so an MN1500 battery equivalent is whatever replaces LR6.
• AM3 — a retail trade marking, not an IEC designation; AM3 batteries are this cell, so an AM3 battery equivalent is whatever replaces LR6.
• 15CD — filed under this designation by the maker but recorded as carbon zinc, which is a different cell in the same shape.
• EV115 — filed under this designation by the maker but recorded as carbon zinc, which is a different cell in the same shape.
• 15A — a manufacturer part number for LR6, not a standard designation.
• A91V — a manufacturer part number for LR6, not a standard designation.

The cell that differs only in depth

The code says the size, so the cells that get confused with LR6 are the ones that keep its diameter and change its depth. 2 cells share this diameter at depths from 47.6 to 48.4 mm, and every one of them enters the same opening.

It stands 1 of 3 in this envelope by stored energy. On a scale the difference shows before it shows on a caliper: this one weighs 23 g.

• 3-315INNC — same diameter, 47.6 mm tall against this cell's 50.5: 2.9 mm shallower, which neither designation carries.
• 3-315I — same diameter, 48.4 mm tall against this cell's 50.5: 2.1 mm shallower, which neither designation carries.
• FR14505 — the same 14.5 x 50.5 mm in lithium at 1.5 V. Identical on a caliper, different in the circuit.
• FR6 — the same 14.5 x 50.5 mm in lithium at 1.5 V. Identical on a caliper, different in the circuit.
• 3-315 — 14 mm across at 1.5 V against 14.5 mm here, 0.5 mm apart: loose in this holder.

Capacity is printed only on the A91V data sheet; the other 10 records behind this page print none, so treat it as that line's figure rather than every LR6's.

Same size, and not the same voltage

The AA compartment takes cells of more than one voltage. This one is 1.5 V; HR6 in the same size runs 1.2 V, -20.0% of this cell — low enough that a calibrated instrument reads below true. Nothing about the shape warns you, which is why the label matters more here than the size does.

What this cell can stand in for

2 designations Energizer no longer lists point at this cell as the closest thing it does list, and the voltage is the same. If a device was built for one of them, this is a straight substitution.

Each row names a cell no longer made, with its own voltage and chemistry. Fit of this cell and Voltage of this cell describe this cell put in its place: whether it enters that compartment, and how far its voltage sits from the voltage the device was built for. The discontinued cell’s own page prints the same figure for the same swap.

What the chemistry changes

Everything above answers size and voltage. What it cannot answer is chemistry, and 3 other kinds are in play here beside the alkaline this cell uses.

• Alkaline drops in voltage steadily as it empties, so a device calibrated for a flat discharge will drift as it goes.
• Carbon zinc carries a fraction of the capacity of an alkaline cell of the same size and leaks more readily when spent.
• Lithium runs at 1.5 V, the same nominal the alkaline and silver classes carry. Of the 24 lithium cells here whose envelope the maker publishes, 3 share that envelope with an alkaline or silver cell.
• Nickel-metal hydride is rechargeable and sits at 1.2 V, below the nominal of the primary cell whose slot it takes. It is never a drop-in for a primary cell no matter how well it fits, and a device that cuts off early will read it as flat.

The household slot this size sits in

LR6 is an AA, which is a shape rather than a specification: 11 designations share the same slot in the Energizer data this site reads under different chemistries. This one is alkaline at 2700 mAh. Across the AA the published capacity runs from 2850 mAh (3-315) to 700–1100 mAh (R6). The compartment does not change; the run time changes by up to 4.1x.

The other chemistries in this slot are carbon zinc, lithium, mercuric oxide and nickel-metal hydride, and only the label says which one is in your hand. An alkaline cell left in a device it is not powering is the commonest way this size ruins equipment: the leak happens on the shelf, not under load. The nearest is R6: it drops straight in and runs 1.5 V, same volts.

• 4 cells measure close enough to compare against it in the Energizer data this site reads, and 4 of them are still listed.
• By stored energy it stands 1 of 3 in its envelope, at 4050 milliwatt-hours.
• Energizer files it for Asia Pacific, Europe, Latin America and North America, which is where the part is sold rather than where the cell will work.
• The maker still lists it, under 13 product lines: A91, A91V, AX91 and E91.

Drawn to scale

Every published figure

11 figures are published, and one is not: impedance. The row is absent rather than estimated. It reaches shelves as A91, A91V, AX91 and E91.

Energizer files 15CD, EV115, 15C and EV15 under this designation as well, but its records give those a carbon zinc chemistry rather than alkaline. They are a different cell, not another marking for this one.

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 LR6 carries an operating range as well as a capacity, and it reaches -18 C (-0 F) at the cold end. 4 more published figures follow it, and none of them reaches a cross-reference table.

The part occupies 8.1 cubic centimeters and weighs 23 g. Capacity and voltage together put 4050 milliwatt-hours in that space. Energizer files it for Asia Pacific, Europe and Latin America.

Operating range

-18 C (-0 F) to 55 C (131 F). Below the lower figure the maker makes no claim at all, which is not the same as the cell stopping.

Cutoff voltage

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

Maker's classification

Alkaline. That is the maker's own filing word for the part, not a standard designation.

Mass against volume

23 g filling 8.1 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, Europe, Latin America and North America. That is a statement about the maker's distribution and not about where the cell works.

Is that a lot of energy?

Nothing else measured in this shell holds more. At 4050 milliwatt-hours it leads 2 other cells, and the next one down carries at most 79% of what it does. Per unit of volume that is 500 mWh per cubic centimeter, denser than 83% of everything measured here.

More energy per cubic centimeter than most

LR6 packs more into its volume than most of what is measured here: 500 milliwatt-hours per cubic centimeter, above 83 percent of the corpus.

4 of those ones are still listed. Its 500 milliwatt-hours per cubic centimeter sit above 83 percent of everything here that publishes both a capacity and a volume. 36 of the 66 cylinders share its 1.5 V exactly.

• FR14505 — the next step down by volume: 8 cubic centimeters against this cell's 8.1.
• HR6 — the next step up: 8.3 cubic centimeters, 102% of this one.
• FR14505 — 14.5 x 50.5 mm, 1.5 V, lithium.
• FR6 — 14.5 x 50.5 mm, 1.5 V, lithium.

One figure the maker does not publish

One field is empty for LR6: 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 13 records behind this designation, so they are the catalog's silence and not a merge losing a value. What is not missing is the envelope: 14.5 x 50.5 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 here is the figure for one swap: the voltage of the cell that goes in, measured against the cell the device was built for, and the figure belongs to the cell whose voltage is printed beside it. In the table of cells that fit in place of this one, and on the scale, that is each candidate against this cell: a cell that runs lower carries a minus, one that runs higher carries a plus, and a cell at the same nominal voltage carries zero. In the table of cells no longer made, it is this cell against each of them, because the swap goes into a device built for the old cell, and that cell’s own page prints the same figure for the same swap. Where cells still listed can each stand in for the other, those are different swaps: each page measures against its own cell, the sign is the other one, and the size can differ slightly, because one gap is a larger share of the lower voltage; 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

The shell is shared across chemistries: 4 cells sit at exactly this size in carbon zinc, lithium and nickel-metal hydride. Same hole, different insides, different discharge curve.

• FR14505 — 14.5 x 50.5 mm, 1.5 V
• FR6 — 14.5 x 50.5 mm, 1.5 V
• HR6 — 14.5 x 50.5 mm, 1.2 V
• R6 — 14.5 x 50.5 mm, 1.5 V
• 3-315INNC — 14.3 x 47.6 mm, 1.5 V
• 3-315I — 14.3 x 48.4 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.

Records that disagree behind this page

LR6 is assembled from 13 catalog records, and they do not agree with each other on every field. Both sides are numbered below so the disagreement can be read rather than taken on trust.

1. [1] Energizer catalog record 195, listed as A91, active in the snapshot. Technical data sheet: A91LA0426.pdf.
2. [2] Energizer catalog record 255, listed as E91, active in the snapshot. Technical data sheet: E91NA0426.pdf.
3. [3] Energizer catalog record 276, listed as EN91, active in the snapshot. Technical data sheet: EN91_Industrial_NA.pdf.
4. [4] Energizer catalog record 712, listed as A91V, obsolete in the snapshot. Technical data sheet: a91v.pdf.
5. [5] Energizer catalog record 732, listed as AX91, obsolete in the snapshot. No technical data sheet is filed against this record.
6. [6] Energizer catalog record 864, listed as EV115, obsolete in the snapshot. Technical data sheet: ev115.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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