---
title: "FR03 equivalent: FR10G445, L92, 24-LF"
description: "The FR03 is a 1.5 V lithium (primary) cell, also sold as FR10G445, L92, 24-LF. Full equivalents, what does not substitute, and where it is used."
url: https://atoneplace.net/battery/fr03/
site: "At One Place"
---

# FR03 battery

**What replaces a FR03: FR10G445, L92, 24-LF, Energizer Ultimate Lithium AAA**

1.5 V lithium (primary), 10.5 × 44.5 mm (diameter × height)

The FR03 is a single-use 1.5 V lithium (primary) cylindrical. The codes below are the same physical cell sold under different manufacturer names, and any of them will fit.

## Specification

- **IEC designation:** FR03
- **ANSI / NEDA:** 24-LF
- **Nominal voltage:** 1.5 V
- **Chemistry:** Lithium (primary)
- **Size:** 10.5 × 44.5 mm (diameter × height)
- **Typical capacity:** 1250 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? |
| --- | --- |
| FR10G445 | Yes — same cell |
| L92 | Yes — same cell |
| 24-LF | Yes — same cell |
| Energizer Ultimate Lithium AAA | Yes — same cell |

## Codes that look close but are not

| Code | Why it is not a substitute |
| --- | --- |
| 10440 | The AAA-shaped rechargeable lithium-ion cell at 3.7 V. Not a substitute. |

> The FR03 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

- Trail cameras and outdoor sensors
- Headlamps used in cold weather
- Medical devices needing long shelf life
- GPS trackers

## Common questions

### What is equivalent to a FR03?

FR10G445, L92, 24-LF, Energizer Ultimate Lithium AAA — all the same 1.5 V cell under different manufacturer codes.

### Can I use a 10440 instead of a FR03?

The AAA-shaped rechargeable lithium-ion cell at 3.7 V. Not a substitute.

### Is the FR03 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/)