---
title: "HR03 equivalent: HR03, HR11/45, 1.2H1"
description: "The HR03 is a 1.2 V nickel-metal hydride cell, also sold as HR03, HR11/45, 1.2H1. Full equivalents, what does not substitute, and where it is used."
url: https://atoneplace.net/battery/nimh-aaa/
site: "At One Place"
---

# HR03 battery

**What replaces a HR03: HR03, HR11/45, 1.2H1, NH12, Eneloop AAA, Ni-MH AAA**

1.2 V nickel-metal hydride, 10.5 × 44.5 mm (diameter × height)

The HR03 is a rechargeable 1.2 V nickel-metal hydride cylindrical. The codes below are the same physical cell sold under different manufacturer names, and any of them will fit.

## Specification

- **IEC designation:** HR03
- **ANSI / NEDA:** 1.2H1
- **Nominal voltage:** 1.2 V
- **Chemistry:** Nickel-metal hydride
- **Size:** 10.5 × 44.5 mm (diameter × height)
- **Typical capacity:** 800 mAh
- **Rechargeable:** Yes

## Codes that mean the same battery

*Different manufacturers, one physical battery. Voltage, chemistry and dimensions all match.*

| Code | Fits? |
| --- | --- |
| HR03 | Yes — same cell |
| HR11/45 | Yes — same cell |
| 1.2H1 | Yes — same cell |
| NH12 | Yes — same cell |
| Eneloop AAA | Yes — same cell |
| Ni-MH AAA | Yes — same cell |

## Codes that look close but are not

| Code | Why it is not a substitute |
| --- | --- |
| 10440 | The AAA-sized lithium-ion cell at 3.7 V. Different chemistry, different charger, more than three times the voltage. |
| Alkaline AAA | 1.2 V rather than 1.5, with the same caveats as AA about devices that judge charge by voltage. |

## Where it turns up

- Remote controls and small torches
- Wireless keyboards and mice
- Cordless phone handsets
- Solar garden lights

> Typically 750–950 mAh, against roughly 1150 mAh for an alkaline AAA at low drain.

## Common questions

### What is equivalent to a HR03?

HR03, HR11/45, 1.2H1, NH12, Eneloop AAA, Ni-MH AAA — all the same 1.2 V cell under different manufacturer codes.

### Can I use a 10440 instead of a HR03?

The AAA-sized lithium-ion cell at 3.7 V. Different chemistry, different charger, more than three times the voltage.

### Is the HR03 rechargeable?

Yes. Use a charger made for its chemistry and never substitute a primary cell of the same size.

## 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/)
- [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/)
- [CR15H270 battery](https://atoneplace.net/battery/cr2/)

## Sources

- Typical range compiled from manufacturer specifications — At One Place (/about/)