# Car battery Kronobat SD-45.1 12V 45Ah 400A

![Car battery Kronobat SD-45.1 12V 45Ah 400A](https://baterias.com/3266-home_default/best-price-battery-12v-45ah-sd-45_1.jpg)

> Kronobat SD-45.1 car battery 12V 45Ah 400A. STANDARD range. Dimensions 207×175×190 mm, + terminal on the left. Check fitment by plate.

**Category:** [Car Batteries](https://baterias.com/gb/car-batteries) → [KRONOBAT](https://baterias.com/gb/kronobat)

- **Canonical URL**: https://baterias.com/gb/best-price-battery-12v-45ah-sd-45_1
- **Language**: en-GB
- **Brand**: KRONOBAT
- **Reference**: BCOM-KRONOBAT-SD-45.1
- **MPN**: SD-45.1
- **Price**: 49,70 €
- **Stock**: Out of stock

## Technical specifications

| Feature | Value |
|---|---|
| Reference | SD-45.1 |
| Model | STANDARD |
| Voltage (V) | 12 V |
| Largo | 207 cm |
| Ancho | 175 cm |
| Alto | 190 cm |
| Peso | 11.7 kg |
| Tecnología | Lead-acid |
| Terminal layout | Positive terminal on the left |
| Terminal type | 1 |
| Cold cranking amps (EN) | 400 A |
| Capacity (C20) | 45 Ah (c20) |

## Quick description

**Kronobat SD-45.1 12V 45Ah 400A** is a passenger car battery with factory-guaranteed cranking power and extended service life. OEM quality at white-label prices: calcium-silver grids, low self-discharge and compatible with all modern electrical systems.

## Why this car battery?

- **Original-equipment quality** without dealership prices
- **Lasts 4 to 6 years** buy once instead of twice
- **Real human tech support** if you have any doubts before buying

🔌 Voltage
12 V

⚡ Capacity
45 Ah C20

🔋 Cold cranking
400 A EN-1

📏 Dimensions
207×175×190 mm

⚙️ Technology
Lead-acid

🧭 Polarity
Positive on the left

⚖️ Weight
11,7 kg

🏷️ Model
STANDARD

## Description

## Car battery Kronobat SD-45.1 Standard 45Ah 400A 12V

12*V* Voltage
45*Ah* Capacity
400*A* Cold cranking
11.70*kg* Weight

The **Kronobat SD-45.1** from the **Standard** range delivers **45 Ah** and **400 A** of cold cranking current (EN) at **12 V**: the usual specification for passenger cars with conventional starting, without a Start-Stop system. Its 207 × 175 × 190 mm and the positive terminal on the left make it the exact replacement for the 45 Ah battery fitted as standard to many cars.
- Designed to last several years under normal daily use.
- Low self-discharge: copes with long stops without losing charge.
- Stable voltage for the vehicle electronics (ECU, sensors, climate control).
- Good balance of capacity, cranking power and price.

### What the Kronobat SD-45.1 is for

The Kronobat SD-45.1 covers the needs of passenger cars with conventional starting, without a Start-Stop system: reliable starting, stable voltage for the electronics and a service life of several years in daily use. Check that it matches your current battery in size and terminal position. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 11.70 kg and 1.0 terminals.

### The Kronobat SD-45.1: Standard range and conventional lead-acid technology

Within the Kronobat catalogue, the **Standard** series groups the references designed for this use. The SD-45.1 is the 45 Ah model of that family, with the same performance as its siblings in other sizes.
Conventional lead-acid is the benchmark against which other technologies are compared: good cranking current, great tolerance to alternator charging and the best price per amp-hour.

### Dimensions, polarity and mounting

It has external dimensions of 207 × 175 × 190 mm and weighs 11.70 kg. The positive terminal on the left decides which side the cables end up on: it is the detail that causes most buying mistakes, so check it before ordering. It uses 1.0 terminals, the system that anchors and connects it in the vehicle. Checking the three dimensions and the terminal position before buying avoids the most common mistake when replacing a battery.

### What Kronobat does differently

With Kronobat we offer an own-brand alternative without compromising on quality: European manufacturing, original-equipment controls and the direct backing of baterias.com for warranty and advice. We guarantee that every Kronobat arrives new, charged and with the manufacturer's full warranty.

### How to make it last longer

Avoid leaving lights or accessories on with the engine off: most batteries fail not through defects but through repeated deep discharges. On batteries with filler caps, check the electrolyte level and top up only with distilled water.

### Warranty and coverage

The Kronobat SD-45.1 comes with the **manufacturer's official warranty** against manufacturing defects; the exact period is stated in the brand's conditions. If it fails through a defect within the period, we replace it free of charge.

### When you get it and how to return it

Order **before [[ks:cutoff]]** with stock available and it leaves today: mainland Spain and Portugal receive it in 24-48 working hours, the islands and the rest of the EU in 3 to 5 days. You have **[[ks:return_days]] days** to return it if it has not been installed, with free collection on the mainland, and shipment tracking by email.

## Frequently asked questions

### How is the Kronobat SD-45.1 battery installed in the vehicle?

In most cars it fits in 15-30 minutes with a 10 mm wrench; if the battery is under the seat or in the boot the time can double. See the step-by-step guide on our blog. Quick summary: 1) switch off the engine and remove the key; 2) locate the original battery (engine bay, boot or under seat); 3) disconnect the negative (−) terminal first, then the positive (+); 4) loosen the hold-down clamp and remove the old battery; 5) fit the new one in the same orientation — with positive on the left match the polarity shown on the product sheet; 6) connect the positive (+) first, then the negative (−). On cars with Start-Stop or BMS, register the battery via OBD so the alternator applies the correct charging profile.

### What is the service life of the SD-45.1 model?

Expected lifespan of the Kronobat SD-45.1 is 4 to 6 years in regular car use without Start-Stop. In cold regions it drops slightly due to cold-start stress; in very hot regions it also drops because of electrolyte evaporation. To extend its life: avoid deep discharges (headlights on with engine off), have the alternator checked yearly, and keep the battery clean and properly secured.

### What are the dimensions of the Kronobat SD-45.1 battery?

Dimensions (length × width × height) are 207×175×190 mm — also written as 207x175x190 mm and correspond to the European L1 case size — following the European DIN standard. Always measure the space in your car before buying: even one extra millimetre can prevent the hold-down clamp from closing. The height shown includes the terminals.

### On which side is the positive of the SD-45.1 model?

Polarity: positive on the left. To identify it, place the battery in front of you with the terminals facing you and check which side the positive (+, marked with a red ring) is on. Before buying, verify the polarity matches your current battery: switching polarity forces longer cables or system reconfiguration, with short-circuit risk.

### Does this battery fit my car?

Three options to confirm: 1) enter your number plate in the finder (DGT/DVLA/KBA auto-detect your model and engine); 2) check the "Compatible vehicles" tab on this page, where we list every vehicle verified by our technical team; 3) if you cannot find your model, message us on WhatsApp with brand, model, engine and year — we reply during business hours (Mon–Fri 10:00–13:30 and 16:40–18:00 (Spanish time, CET)). The SD-45.1 typically fits a wide range of European vehicles thanks to its standard DIN case format.

### Which batteries are equivalent to the Kronobat SD-45.1?

Directly interchangeable batteries (same dimensions, same polarity, same Ah and CCA) are the OEM equivalents from leading brands: Bosch, Tudor, Exide and, depending on the model, Banner or Yuasa. Exact equivalence depends on technology — an EFB cannot be replaced with a conventional battery in Start-Stop cars. See the "Equivalents" section to view recommended options at the same performance level.


## Technical team (editorial authorship)

The FAQs, guides and comparisons on this site are reviewed by the baterias.com technical team — automotive battery specialists since 2012.

→ https://baterias.com/gb/technical-team

---
*baterias.com — Automotive batteries · 2026-10-21*