---
title: "CR17345 equivalent: CR123, CR17345, 123A"
description: "The CR17345 is a 3 V lithium (primary) cell, also sold as CR123, CR17345, 123A. Full equivalents, what does not substitute, and where it is used."
url: https://atoneplace.net/battery/cr123a/
site: "At One Place"
---

# CR17345 battery

**What replaces a CR17345: CR123, CR17345, 123A, DL123A, EL123AP, K123LA**

3 V lithium (primary), 17 × 34.5 mm (diameter × height)

The CR17345 is a single-use 3 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:** CR17345
- **ANSI / NEDA:** 5018LC
- **Nominal voltage:** 3 V
- **Chemistry:** Lithium (primary)
- **Size:** 17 × 34.5 mm (diameter × height)
- **Typical capacity:** 1500 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? |
| --- | --- |
| CR123 | Yes — same cell |
| CR17345 | Yes — same cell |
| 123A | Yes — same cell |
| DL123A | Yes — same cell |
| EL123AP | Yes — same cell |
| K123LA | Yes — same cell |
| 5018LC | Yes — same cell |
| SF123A | Yes — same cell |
| VL123A | Yes — same cell |
| BR2/3A | Yes — same cell |

## Codes that look close but are not

| Code | Why it is not a substitute |
| --- | --- |
| 16340 / RCR123A | The rechargeable lithium-ion cell in the same 16 × 34 mm space — note it is 1 mm narrower, and 3.7 V nominal against 3.0, 4.2 V straight off the charger. Some torches accept both and say so; many do not, and the extra 1.2 V has been enough to destroy driver circuits and, in a two-cell light, to overheat. |
| Two CR123A of different age or brand in series | In two-cell torches, mismatched primaries can drive the weaker one into reversal, which vents it. Replace both at once, same brand, same date. |

> The CR17345 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

- Tactical and high-output LED torches
- Home security sensors and Arlo cameras
- Film cameras — Canon EOS, Nikon and Contax bodies
- Laser sights and red-dot optics

## Common questions

### What is equivalent to a CR17345?

CR123, CR17345, 123A, DL123A, EL123AP, K123LA, 5018LC, SF123A, VL123A, BR2/3A — all the same 3 V cell under different manufacturer codes.

### Can I use a 16340 / RCR123A instead of a CR17345?

The rechargeable lithium-ion cell in the same 16 × 34 mm space — note it is 1 mm narrower, and 3.7 V nominal against 3.0, 4.2 V straight off the charger. Some torches accept both and say so; many do not, and the extra 1.2 V has been enough to destroy driver circuits and, in a two-cell light, to overheat.

### Is the CR17345 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/)
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- [LR20 battery](https://atoneplace.net/battery/d/)
- [HR6 battery](https://atoneplace.net/battery/nimh-aa/)
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## Sources

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