# Kronobat SD-91.1T · Car battery 12V 91Ah 740A

![Kronobat SD-91.1T · Car battery 12V 91Ah 740A](https://bateriasonline.es/2308-home_default/kronobat-sd-91-1t.jpg)

> Kronobat SD-91.1T: 91 Ah car battery, 740 A (EN), 306×173×225 mm, positive terminal on the left, D31 case. Equivalent to Exide EC905.

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

- **Canonical URL**: https://bateriasonline.es/en/kronobat-sd-91-1t
- **Language**: en
- **Brand**: Kronobat
- **Reference**: BOL-KRONOBAT-SD-91.1T
- **MPN**: SD-91.1T
- **Price**: 89,77 € (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 left |
| Case size | D31 (306 × 173 × 225 mm) |

## Quick description

Kronobat SD-91.1T: 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 left. With the positive terminal on the right, the exact counterpart is the Kronobat SD-91.0T.

## Description

## Who the Kronobat SD-91.1T is for

The Kronobat SD-91.1T 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. If your car has no Start-Stop and had a 91 Ah battery, the SD-91.1T is a direct replacement.
At 91 Ah it moves into large diesels, SUVs, vans and cars with heavy electrical equipment. The SD-91.1T belongs to the Kronobat STANDARD range. [The full range of Kronobat batteries](https://bateriasonline.es/en/kronobat-batteries)

## Part numbers and codes for the Kronobat SD-91.1T

The SD-91.1T is listed under these codes on labels, in garages and in catalogues:

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

## Kronobat SD-91.1T vs PB-95.1T, SD-91.0T and PB-70.1T

What sets the SD-91.1T apart from its neighbours in the Kronobat range:

| Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight |
|---|---|---|---|---|---|
| Kronobat SD-91.1T (this one) | 91 Ah | 740 A | 306 × 173 × 225 | left | 21.7 kg |
| Kronobat PB-95.1T | 95 Ah | 830 A | 306 × 173 × 225 | left | 21.7 kg |
| Kronobat SD-91.0T | 91 Ah | 740 A | 306 × 173 × 225 | right | 21.7 kg |
| Kronobat PB-70.1T | 70 Ah | 630 A | 261 × 175 × 220 | left | 16.8 kg |

- Kronobat PB-95.1T: 4 Ah more, 90 A more cranking power, the same D31 case.
- The Kronobat SD-91.0T is the same battery with the positive terminal on the other side: choose it if your current battery has the positive terminal on the right.
- Kronobat PB-70.1T: 21 Ah less, 110 A less cranking power, a different case (261 × 175 × 220 mm).

## Equivalents and alternatives to the Kronobat SD-91.1T

Batteries that fit the SD-91.1T's tray with the same polarity; besides other conventional batteries, an EFB or AGM of this size is a valid upgrade for the SD-91.1T.

| Model | Technology | Capacity | Cold cranking (EN) | Dimensions (mm) |
|---|---|---|---|---|
| Varta G8 | Lead-acid | 95 Ah | 830 A | 306 × 173 × 225 |
| Exide EC905 | Lead-acid | 90 Ah | 680 A | 306 × 173 × 222 |
| Tudor TC905 | Lead-acid | 90 Ah | 680 A | 306 × 173 × 222 |
| Fulmen FC905 | Lead-acid | 90 Ah | 680 A | 306 × 173 × 222 |
| Deta DC905 | Lead-acid | 90 Ah | 680 A | 306 × 173 × 222 |
| Exide EB955 | Lead-acid | 95 Ah | 760 A | 306 × 173 × 222 |

## What it means that the SD-91.1T is lead-acid

The SD-91.1T is a conventional lead-acid battery, with plates immersed in liquid electrolyte. Avoid leaving them discharged, as they sulphate, and charge them with a charger that cuts off or switches to maintenance when finished.

## Before ordering the SD-91.1T, check this

- If your car has Start-Stop, the SD-91.1T is not the right one: it needs an EFB or an AGM.
- The SD-91.1T delivers 740 A cold cranking (EN standard); do not go below what your original battery states.
- With 91 Ah, the SD-91.1T replaces an original battery of that capacity or slightly less.
- The SD-91.1T has the positive terminal on the left: compare it with your current battery.
- The SD-91.1T needs 306 × 173 × 225 mm of space (European case size D31): measure it with the hold-down clamp in place.

## Frequently asked questions about the Kronobat SD-91.1T

### SD-91.1T or PB-95.1T: which one suits me?

Compared with the SD-91.1T, the Kronobat PB-95.1T has 4 Ah more and 90 A more cranking power. If your current battery says 830 A or more, choose the PB-95.1T; if it says 740 A or less, the SD-91.1T is enough. Both measure 306 × 173 × 225 mm, so they fit the same tray.

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

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

### Can the Kronobat SD-91.1T be used in a car with Start-Stop?

No. The SD-91.1T is a lead-acid battery for cars without automatic engine stop; Start-Stop needs an EFB or an AGM.

### How much does the Kronobat SD-91.1T weigh?

21.7 kg, with 91 Ah of capacity. For reference, the Kronobat PB-95.1T (95 Ah) weighs 21.7 kg.

### Which battery is equivalent to the Kronobat SD-91.1T?

With the same dimensions, polarity and similar capacity you have the Varta G8, Exide EC905 and Tudor TC905. As the SD-91.1T is a conventional battery, an EFB or AGM of the same size also works.

### What case size is the Kronobat SD-91.1T?

Case size D31: 306 × 173 × 225 mm. The SD-91.1T fits any standard D31 battery tray such as the Varta G8.

## Other options if you are unsure about the SD-91.1T

- [More car batteries](https://bateriasonline.es/en/car-batteries)
- [More Kronobat models](https://bateriasonline.es/en/kronobat-batteries)
- [Varta G8](https://bateriasonline.es/en/varta-g8) · 95 Ah, 830 A, 306×173×225 mm
- [Exide EC905](https://bateriasonline.es/en/exide-ec905) · 90 Ah, 680 A, 306×173×222 mm

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