---
title: "BCI Group 27 equivalent: Group 27, 27-, Group 27F (reversed te"
description: "The BCI Group 27 is a 12 V lead-acid cell, also sold as Group 27, 27-, Group 27F (reversed terminals). Full equivalents, what does not substitute, and where it is us"
url: https://atoneplace.net/battery/bci-27/
site: "At One Place"
---

# BCI Group 27 battery

**What replaces a BCI Group 27: Group 27, 27-, Group 27F (reversed terminals)**

12 V lead-acid, 306 × 173 × 225 mm

The BCI Group 27 is a rechargeable 12 V lead-acid prismatic. The codes below are the same physical cell sold under different manufacturer names, and any of them will fit.

## Specification

- **IEC designation:** BCI Group 27
- **Nominal voltage:** 12 V
- **Chemistry:** Lead-acid
- **Size:** 306 × 173 × 225 mm
- **Rechargeable:** Yes

## Codes that mean the same battery

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

| Code | Fits? |
| --- | --- |
| Group 27 | Yes — same cell |
| 27- | Yes — same cell |
| Group 27F (reversed terminals) | Yes — same cell |

## Codes that look close but are not

| Code | Why it is not a substitute |
| --- | --- |
| Group 24 | Around 46 mm shorter. A 24 in a 27 tray slides; a 27 will not fit a 24 tray at all. |
| Group 31 | Taller and heavier again, with stud terminals rather than posts on many models. |

## Where it turns up

- Boat house and trolling motor banks
- RV and camper van leisure batteries
- Off-grid solar storage
- Larger trucks and commercial vehicles

## Common questions

### What is equivalent to a BCI Group 27?

Group 27, 27-, Group 27F (reversed terminals) — all the same 12 V cell under different manufacturer codes.

### Can I use a Group 24 instead of a BCI Group 27?

Around 46 mm shorter. A 24 in a 27 tray slides; a 27 will not fit a 24 tray at all.

### Is the BCI Group 27 rechargeable?

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

## Related pages

- [6LR61 battery](https://atoneplace.net/battery/9v/)
- [BCI Group 48 battery](https://atoneplace.net/battery/bci-48/)
- [BCI Group 35 battery](https://atoneplace.net/battery/bci-35/)
- [BCI Group 51R battery](https://atoneplace.net/battery/bci-51r/)
- [BCI Group 65 battery](https://atoneplace.net/battery/bci-65/)
- [BCI Group 24F battery](https://atoneplace.net/battery/bci-24f/)
- [BCI Group 47 battery](https://atoneplace.net/battery/bci-47/)
- [BCI Group 49 battery](https://atoneplace.net/battery/bci-49/)
- [BCI Group 24 battery](https://atoneplace.net/battery/bci-24/)
- [BCI Group 34 battery](https://atoneplace.net/battery/bci-34/)
- [BCI Group 78 battery](https://atoneplace.net/battery/bci-78/)
- [CR-P2 battery](https://atoneplace.net/battery/crp2/)

## Sources

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