Index / CR11108
CR11108
CR11108 — lithium, 3 V, 11.6 x 10.8 mm. Current, and nothing else in the data shares its size.
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.
| Cell | Fit | Voltage | Chemistry | Capacity |
|---|---|---|---|---|
| SR44 | sits lower | 1.55 V -48.3%wrong class | silver oxide | 195 mAh |
| SR43 | sits lower | 1.55 V -48.3%wrong class | silver oxide | 110 mAh |
| SR42 | sits lower | 1.55 V -48.3%wrong class | silver oxide | 100 mAh |
| SR54 | sits lower | 1.55 V -48.3%wrong class | silver oxide | 85 mAh |
| SR55 | sits lower | 1.55 V -48.3%wrong class | silver oxide | 55 mAh |
| LR44 | sits lower | 1.5 V -50.0%wrong class | alkaline | 150 mAh |
| LR43 | sits lower | 1.5 V -50.0%wrong class | alkaline | 113 mAh |
| LR54 | sits lower | 1.5 V -50.0%wrong class | alkaline | 66 mAh |
| PR44 | sits lower | 1.45 V -51.7%wrong class | zinc air | — |
Nothing Energizer still lists is the same depth. The 9 options below share the diameter and run 2 to 5.4 mm against this cell's 10.8, and every one of them is shallower, so each stands off the contact by the difference — a spring may take that up and a flat tab will not.
Also stamped 2L76
The axis is the difference from this cell, not a range of volts: the centre is 3 V and the ruled middle is the class where a substitute still runs and only reads off — a gap within 20.0% of the higher of the two nominals, which counted from this cell reaches 20.0% below and 25.0% above. One gap, two readings: the other cell’s page prints the other figure for this same pair and lands on the same class. Outside those two rules the class changes. The middle is drawn straight and the outer fifth of each side is compressed, so the -51.7% mark and the -48.3% mark on this track cannot land in the same place.
The deepest cell this diameter comes in
No coin cell at 11.6 mm across is deeper than this. 20 other cells share the diameter and every one of them is shorter, down to 1.6 mm for 1177SO, so a compartment built for this cell will take any of them and leave a gap.
What the chemistry changes
Everything above answers size and voltage. What it cannot answer is chemistry, and 2 other kinds are in play here beside the lithium this cell uses.
- Lithium runs at 3 V, roughly double the nominal of the alkaline and silver classes. Of the 26 lithium cells here whose envelope the maker publishes, 3 share that envelope with an alkaline or silver cell.
- Silver oxide holds its voltage almost flat until it is spent, which is why watches and light meters were built around it.
- Alkaline drops in voltage steadily as it empties, so a device calibrated for a flat discharge will drift as it goes.
What a lithium coin is asked to hold
A lithium coin 11.6 mm across holds 3 V with almost no self-discharge, which is why sockets that must remember something for years are cut for this shape. Published capacity 160 mAh. In a memory-backup socket that is measured in years rather than hours; under a camera or a transmitter load it is measured in shots.
Same diameter, other depths: 1177SO, 365, SR55 and LR55. They are not one voltage: this diameter carries 1.5 V, 1.55 V and 3 V. Depth is not the only thing that changes here. 9 cells measure close enough to compare against it in the Energizer data this site reads, and 9 of them are still listed. The nearest is SR44: it enters and sits lower and runs 1.55 V, wrong class.
- Energizer files it for Asia Pacific, 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 1 product line: 2L76.
Drawn to scale
CR11108, side elevation, from the published figures
The same scale for all of them. The dashed line marks the height of CR11108: a silhouette that stops short of it will not reach the contact, one that crosses it will not let the cover close.
Every published figure
11 figures are published, and one is not: impedance. The row is absent rather than estimated. It reaches shelves as 2L76.
| Designation | CR11108 |
|---|---|
| Also stamped | 2L76 |
| Chemistry | Lithium Photo/Coin |
| Nominal voltage | 3 V |
| Diameter | 11.6 mm |
| Height | 10.8 mm |
| Weight | 3 g |
| Volume | 1.1 cc |
| Capacity | 160 mAh to 2 V |
| Stored energy | 480 mWh |
| Energy density | 436 mWh per cc |
| In the Energizer catalog | Listed |
| Listed for | Asia Pacific, Latin America, North America |
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 CR11108 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 1.1 cubic centimeters and weighs 3 g. Capacity and voltage together put 480 milliwatt-hours in that space. Energizer files it for Asia Pacific, Latin America and North America.
- 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
- 3 g filling 1.1 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, 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 shares this shell, so the comparison has to go site-wide: 480 milliwatt-hours in 1.1 cubic centimeters is 436 mWh per cc, denser than 71% of every cell measured here. Density is ours: the maker publishes capacity and volume and never divides one by the other.
A width the catalog keeps returning to
11.6 mm is a width this catalog keeps coming back to: 20 coins sit within half a millimeter of it, CR11108 included.
9 of those ones are still listed. Its 436 milliwatt-hours per cubic centimeter sit above 71 percent of everything here that publishes both a capacity and a volume. 16 of the 82 coins share its 3 V exactly.
- CR2032 — the next step down by volume: 1 cubic centimeters against this cell's 1.1.
- MR9 — the next step up: 1.2 cubic centimeters, 109% of this one.
- 1177SO — 11.6 x 1.6 mm, 1.55 V, silver oxide.
- LR43 — 11.6 x 4.2 mm, 1.5 V, alkaline.
The maker's own part numbers
CR11108 carries 1 name beyond the designation, and every one of them is a manufacturer part number: a catalog line, not a size and not a standard.
- 2L76 — a manufacturer part number for CR11108, not a standard designation.
The cell that differs only in depth
The code says the size, so the cells that get confused with CR11108 are the ones that keep its diameter and change its depth. 20 cells share this diameter at depths from 1.6 to 5.4 mm, and every one of them enters the same opening.
It stands 1 of 1 in this envelope by stored energy. On a scale the difference shows before it shows on a caliper: this one weighs 3 g.
- 1177SO — same diameter, 1.6 mm tall against this cell's 10.8: 9.2 mm shallower, which neither designation carries.
- 365 — same diameter, 1.6 mm tall against this cell's 10.8: 9.2 mm shallower, which neither designation carries.
- SR55 — same diameter, 2 mm tall against this cell's 10.8: 8.8 mm shallower, which neither designation carries.
- BR1225 — 12.5 mm across at 3 V against 11.6 mm here, 0.9 mm apart: too wide to enter in this holder.
- CR1216 — 12.5 mm across at 3 V against 11.6 mm here, 0.9 mm apart: too wide to enter in this holder.
One figure the maker does not publish
One field is empty for CR11108: 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: 11.6 x 10.8 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
Nothing in this data is this exact size, but the diameter is a well populated one: 20 cells run from 1.6 to 5.4 mm deep, and this cell is one point on that scale.
- 1177SO — 11.6 x 1.6 mm, 1.55 V
- 365 — 11.6 x 1.6 mm, 1.55 V
- SR55 — 11.6 x 2 mm, 1.55 V
- LR55 — 11.6 x 2.1 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 84, and it is linked below. The sheet is the document the dimensions, voltage and capacity were read out of.
- [1] Energizer catalog record 84, listed as 2L76, active in the snapshot. Technical data sheet: 2l76.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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