N batteries: every designation in the size
An N is a shape, not a specification. 3 designations share it here, running 1000 mAh wherever the maker publishes a figure, and every one of them delivers 1.5 V.
Every cell called N here, at one scale
| Cell | Envelope | Volts | Chemistry | Energizer |
|---|---|---|---|---|
| LR1 | 12 x 30.2 mm | 1.5 V | alkaline | Listed |
| 3-0411 | 11.4 x 27.9 mm | 1.5 V | alkaline | Not listed |
| 3-0411I | 11.8 x 28.1 mm | 1.5 V | alkaline | Not listed |
N is a name, and the name covers a range
The 3 designations sold as N in this data are not one size. Across them the diameter runs 11.4 to 12 mm and the length runs 27.9 to 30.2 mm, a spread of 0.6 mm across and 2.3 mm along.
The longest is LR1 at 30.2 mm and the shortest 3-0411 at 27.9 mm; the widest is LR1 at 12 mm and the narrowest 3-0411 at 11.4 mm. This site treats anything inside 0.3 mm as a drop-in, because that is the order of the spring travel in a contact, not a round number. The 2.3 mm along this size is wider than that tolerance, so the ends of the range are not interchangeable on length alone.
How much energy is actually in there
Milliamp-hours cannot be compared across chemistries. Multiplying the published capacity by the published voltage puts every designation called N on one scale, and on that scale the range is 1 times wide — LR1 carries about 1500 mWh and 3-0411I about 1500 mWh.
- LR1 — 1500 mWh (1000 mAh at 1.5 V)
- 3-0411 — 1500 mWh (1000 mAh at 1.5 V)
- 3-0411I — 1500 mWh (1000 mAh at 1.5 V)
These are the maker's own figures at the maker's own test load, and a cell asked for more current than that test uses delivers less. The number is a ceiling and a way to compare, not a promise of runtime in a particular device.
Also stamped on cells in this table: LR1, 910A, E90, EN90, 3-0411, 3-0411I.
What stands next to this size in the data
The envelope above is not the only one near it. Cells that miss by a fraction of a millimeter sit in the same drawer and look identical in the hand, and the question they raise is the one this site answers: not whether a cell is the same, but what the difference does. These are the nearest envelopes to N in this data, closest first.
- 12 x 29 mm — fits but sits lower, first met here as MR1.
- 12.7 x 27.7 mm — is too wide to enter, first met here as 5LR44.
- 10.3 x 28.5 mm — is too narrow to hold contact, first met here as 1811A.
- 12.8 x 25.2 mm — is too wide to enter, first met here as 2CR11108.
- 13 x 25.2 mm — is too wide to enter, first met here as 4LR44.
- 8 x 28.2 mm — is too narrow to hold contact, first met here as A27.
None of the nearest would drop straight in on size alone. Every verdict in that list is about the compartment alone. A cell that drops in physically can still be the wrong cell: the voltage and the chemistry are separate questions, answered separately above and on the page of each designation. Nothing here says a substitution is safe for a particular device, and where the maker of the device names a cell, that naming outranks every millimeter on this page.
What is gone from this size
2 designations of the 3 here are no longer listed by Energizer: 3-0411 and 3-0411I. The table below measures each still-listed cell against 3-0411; the others carry their own figures on their own pages.
Fit answers whether it enters the compartment; every cell here shares the envelope, so fit is already settled. Voltage answers whether the circuit will notice, and chemistry answers what the voltage column cannot say. A cell that fits is not always a safe substitute.
| Still listed | Voltage against 3-0411 | What the percentage does not say |
|---|---|---|
| LR1 | 1.5 V 0%same volts | Same chemistry, so the voltage column is the whole difference |
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.
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.