# Kronobat SD-91.0T · Car battery 12V 91Ah 740A

![Kronobat SD-91.0T · Car battery 12V 91Ah 740A](https://bateriasonline.es/2301-home_default/kronobat-sd-91-0t.jpg)

> Kronobat SD-91.0T: 91 Ah car battery, 740 A (EN), 306×173×225 mm, positive terminal on the right, D31 case. Equivalent to Exide EC904.

**Category:** [Car batteries](https://bateriasonline.es/en/car-batteries) → [Kronobat](https://bateriasonline.es/en/kronobat-batteries)

- **Canonical URL**: https://bateriasonline.es/en/kronobat-sd-91-0t
- **Language**: en
- **Brand**: Kronobat
- **Reference**: BOL-KRONOBAT-SD-91.0T
- **MPN**: SD-91.0T
- **Price**: 81,63 € (VAT incl., Spain)
- **Last updated**: 2026-11-06

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Kronobat |
| Range | STANDARD |
| Application | Cars |
| Technology | Lead-acid |
| Voltage | 12 V |
| Capacity | 91 Ah |
| Cold cranking amps (EN) | 740 A |
| Length | 306 mm |
| Width | 173 mm |
| Height | 225 mm |
| Weight | 21.7 kg |
| Polarity | Positive terminal on the right |
| Case size | D31 (306 × 173 × 225 mm) |

## Quick description

Kronobat SD-91.0T: car battery with 12 V, 91 Ah and 740 A cold cranking current, case size D31 (306 × 173 × 225 mm), with the positive terminal on the right. With the positive terminal on the left, the exact counterpart is the Kronobat SD-91.1T.

## Description

## Who the Kronobat SD-91.0T is for

The Kronobat SD-91.0T is a starter battery for cars without Start-Stop: it delivers the current the starter motor needs and then powers lights, control units and audio with the engine off. Its job is to start the engine in the cold with margin to spare and keep the car's electronics powered.
At 91 Ah it moves into large diesels, SUVs, vans and cars with heavy electrical equipment. The SD-91.0T belongs to the Kronobat STANDARD range. [More Kronobat batteries](https://bateriasonline.es/en/kronobat-batteries)

## Kronobat SD-91.0T vs PB-95.0T, SD-91.1T and PE-85-EFB

The real differences between the SD-91.0T and the closest Kronobat models:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|---|
| Kronobat SD-91.0T (this one) | 91 Ah | 740 A | 306 × 173 × 225 | right | 21.7 kg |
| Kronobat PB-95.0T | 95 Ah | 830 A | 306 × 173 × 225 | right | 21.7 kg |
| Kronobat SD-91.1T | 91 Ah | 740 A | 306 × 173 × 225 | left | 21.7 kg |
| Kronobat PE-85-EFB | 85 Ah | 800 A | 306 × 173 × 225 | right | 26.4 kg |

- Kronobat PB-95.0T: 4 Ah more, 90 A more cranking power, the same D31 case.
- The Kronobat SD-91.1T is the same battery with the positive terminal on the other side: choose it if your current battery has the positive terminal on the left.
- Kronobat PE-85-EFB: 6 Ah less, 60 A more cranking power, the same D31 case, EFB technology.

## Part numbers and codes for the Kronobat SD-91.0T

Look for any of these SD-91.0T codes on your current battery or in the manufacturer's catalogue:

| Commercial reference | SD-91.0T |
|---|---|
| Case size (EN) | D31 |
| Not to be confused with | Kronobat SD-91.1T (91 Ah, 740 A, positive terminal on the left) |

## Equivalents and alternatives to the Kronobat SD-91.0T

Batteries that fit the SD-91.0T's tray with the same polarity; besides other conventional batteries, an EFB or AGM of this size is a valid upgrade for the SD-91.0T.

| Model | Technology | Capacity | Cold cranking (EN) | Dimensions (mm) |
|---|---|---|---|---|
| Varta G7 | Lead-acid | 95 Ah | 830 A | 306 × 173 × 225 |
| Exide EC904 | Lead-acid | 90 Ah | 680 A | 306 × 173 × 222 |
| Tudor TC904 | Lead-acid | 90 Ah | 680 A | 306 × 173 × 222 |
| Fulmen FC904 | Lead-acid | 90 Ah | 680 A | 306 × 173 × 222 |
| Deta DC904 | Lead-acid | 90 Ah | 680 A | 306 × 173 × 222 |
| Exide EB954 | Lead-acid | 95 Ah | 760 A | 306 × 173 × 222 |

## Check this before ordering the Kronobat SD-91.0T

- Length, width and height of the SD-91.0T: 306 × 173 × 225 mm (European case size D31).
- Polarity of the SD-91.0T: positive terminal on the right (if yours has it on the other side, the cables will not reach).
- Your current battery should say about 91 Ah; a little more is also fine.
- Check the EN amps on your battery: if it says 740 A or less, the SD-91.0T covers your engine.
- If your car has Start-Stop, the SD-91.0T is not the right one: it needs an EFB or an AGM.

## Inside the SD-91.0T: lead-acid technology

The SD-91.0T is a conventional lead-acid battery, with plates immersed in liquid electrolyte. In cars without energy management, the SD-91.0T needs no special registration: just connect it.

## Frequently asked questions about the Kronobat SD-91.0T

### SD-91.0T or PB-95.0T: which one suits me?

Compared with the SD-91.0T, the Kronobat PB-95.0T has 4 Ah more and 90 A more cranking power. If your current battery says 830 A or more, choose the PB-95.0T; if it says 740 A or less, the SD-91.0T is enough. Both measure 306 × 173 × 225 mm, so they fit the same tray.

### Kronobat SD-91.0T or SD-91.1T: what is the difference?

Only the polarity: the SD-91.0T has the positive terminal on the right and the SD-91.1T the positive terminal on the left. Capacity (91 Ah), cranking power and dimensions are identical.

### Can the Kronobat SD-91.0T be used in a car with Start-Stop?

No. The SD-91.0T is a lead-acid battery for cars without automatic engine stop; Start-Stop needs an EFB or an AGM; in this same size there is the Kronobat PE-85-EFB.

### How much does the Kronobat SD-91.0T weigh?

21.7 kg, with 91 Ah of capacity. For reference, the Kronobat PB-95.0T (95 Ah) weighs 21.7 kg.

### Which battery is equivalent to the Kronobat SD-91.0T?

With the same dimensions, polarity and similar capacity you have the Varta G7, Exide EC904 and Tudor TC904. As the SD-91.0T is a conventional battery, an EFB or AGM of the same size also works.

### What case size is the Kronobat SD-91.0T?

Case size D31: 306 × 173 × 225 mm. The SD-91.0T fits any standard D31 battery tray such as the Varta G7.

## More batteries to compare with the SD-91.0T

- [More car batteries](https://bateriasonline.es/en/car-batteries)
- [More Kronobat models](https://bateriasonline.es/en/kronobat-batteries)
- [Varta G7](https://bateriasonline.es/en/varta-g7) · 95 Ah, 830 A, 306×173×225 mm
- [Exide EC904](https://bateriasonline.es/en/exide-ec904) · 90 Ah, 680 A, 306×173×222 mm

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*bateriasonline.es — Batteries and accessories · 2026-11-10*