---
title: "LR1 equivalent: LR1, 910A, E90"
description: "The LR1 is a 1.5 V alkaline cell, also sold as LR1, 910A, E90. Full equivalents, what does not substitute, and where it is used."
url: https://atoneplace.net/battery/n/
site: "At One Place"
---

# LR1 battery

**What replaces a LR1: LR1, 910A, E90, MN9100, LR01, AM5**

1.5 V alkaline, 12 × 30.2 mm (diameter × height)

The LR1 is a single-use 1.5 V alkaline cylindrical. The codes below are the same physical cell sold under different manufacturer names, and any of them will fit.

## Specification

- **IEC designation:** LR1
- **ANSI / NEDA:** 910A
- **Nominal voltage:** 1.5 V
- **Chemistry:** Alkaline
- **Size:** 12 × 30.2 mm (diameter × height)
- **Typical capacity:** 850 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? |
| --- | --- |
| LR1 | Yes — same cell |
| 910A | Yes — same cell |
| E90 | Yes — same cell |
| MN9100 | Yes — same cell |
| LR01 | Yes — same cell |
| AM5 | Yes — same cell |
| UM-5 | Yes — same cell |
| Lady | Yes — same cell |
| R1 (zinc-carbon size) | Yes — same cell |

## Codes that look close but are not

| Code | Why it is not a substitute |
| --- | --- |
| AAAA | Narrower and longer at 8.3 × 42.5 mm. Both are odd sizes and both turn up in styluses and remotes, which is how the mix-up happens. |
| A23 | A similar-looking 10.3 × 28.5 mm cylinder, but 12 V. Fitting one where an N belongs applies eight times the voltage. |

> The LR1 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

- Bluetooth and glucose meter accessories
- Some door chimes and garage remotes
- Medical penlights
- Older camera bodies and flash units

## Common questions

### What is equivalent to a LR1?

LR1, 910A, E90, MN9100, LR01, AM5, UM-5, Lady, R1 (zinc-carbon size) — all the same 1.5 V cell under different manufacturer codes.

### Can I use a AAAA instead of a LR1?

Narrower and longer at 8.3 × 42.5 mm. Both are odd sizes and both turn up in styluses and remotes, which is how the mix-up happens.

### Is the LR1 rechargeable?

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

## Related pages

- [LR6 battery](https://atoneplace.net/battery/aa/)
- [LR03 battery](https://atoneplace.net/battery/aaa/)
- [ICR18650 battery](https://atoneplace.net/battery/18650/)
- [LR20 battery](https://atoneplace.net/battery/d/)
- [HR6 battery](https://atoneplace.net/battery/nimh-aa/)
- [LR14 battery](https://atoneplace.net/battery/c/)
- [CR17345 battery](https://atoneplace.net/battery/cr123a/)
- [HR03 battery](https://atoneplace.net/battery/nimh-aaa/)
- [8LR932 battery](https://atoneplace.net/battery/a23/)
- [FR6 battery](https://atoneplace.net/battery/fr6/)
- [INR21700 battery](https://atoneplace.net/battery/21700/)
- [4LR44 battery](https://atoneplace.net/battery/4lr44/)

## Sources

- Official vendor product documentation — At One Place (/about/)