# Car battery Kronobat SD-45.1T 12V 45Ah 300A ![Car battery Kronobat SD-45.1T 12V 45Ah 300A](https://baterias.com/3267-home_default/best-price-battery-12v-45ah-sd-45_1t.jpg) > Kronobat SD-45.1T car battery 12V 45Ah 300A. STANDARD range. Dimensions 219×135×225 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_1t - **Language**: en-GB - **Brand**: KRONOBAT - **Reference**: BCOM-KRONOBAT-SD-45.1T - **MPN**: SD-45.1T - **Last updated**: 2026-08-06 - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Reference | SD-45.1 T | | Model | STANDARD | | Voltage (V) | 12 V | | Largo | 219 mm | | Ancho | 135 mm | | Alto | 225 mm | | Peso | 10.8 kg | | Tecnología | Lead-acid | | Terminal layout | Positive terminal on the left | | Terminal type | 1 | | Cold cranking amps (EN) | 300 A | | Capacity (C20) | 45 Ah (c20) | ## Quick description **Kronobat SD-45.1T 12V 45Ah 300A** is a ready-to-use passenger car battery, sealed and maintenance-free. Delivers the cranking amps the engine needs in cold weather and keeps stable voltage for modern car loads (ECU, sensors, climate control, infotainment). ## 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 300 A EN-1 📏 Dimensions 219×135×225 mm ⚙️ Technology Lead-acid 🧭 Polarity Positive on the left ⚖️ Weight 10,8 kg 🏷️ Model STANDARD ## Description ## Car battery Kronobat SD-45.1T Standard 45Ah 300A 12V 12*V* Voltage 45*Ah* Capacity 300*A* Cold cranking 10.80*kg* Weight The **Kronobat SD-45.1T** from the **Standard** range delivers **45 Ah** and **300 A** of cold cranking current (EN) at **12 V**: the usual specification for passenger cars with conventional starting, without a Start-Stop system. It replaces the original battery without adaptation in cars with a 219 × 135 × 225 mm format: same 45 Ah capacity and the positive terminal on the left. - Conventional lead-acid: the most proven and economical technology. - Reliable cold starts, even after weeks without driving. - Direct replacement for the original battery in size and terminals. - Original-equipment build quality without the dealership price. ### What the Kronobat SD-45.1T is for Designed for passenger cars with conventional starting, without a Start-Stop system, the Kronobat SD-45.1T is the direct replacement when your vehicle uses a 45 Ah battery of this format. Before buying, compare dimensions, terminals and capacity with the battery you are replacing. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 10.80 kg and 1.0 terminals. ### The Kronobat SD-45.1T: Standard range and conventional lead-acid technology The SD-45.1T is part of the Kronobat **Standard** range. Choosing the right reference within the series comes down to capacity, dimensions and terminals: technology and quality are common to the whole family. In a conventional battery the electrolyte is liquid and the lead plates are immersed in it. It is a mature, economical and easily recycled technology, ideal for starting vehicles in normal use. ### Will it fit your current battery tray? It has external dimensions of 219 × 135 × 225 mm and weighs 10.80 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. ### Kronobat: the maker behind the SD-45.1T Kronobat is the exclusive brand of baterias.com: batteries made to the same production standards as the leading brands, with a value for money that is hard to match and an official warranty. We guarantee that every Kronobat arrives new, charged and with the manufacturer's full warranty. ### How to make it last longer On batteries with filler caps, check the electrolyte level and top up only with distilled water. In normal daily use the alternator keeps the battery charged; if the car stands for weeks, a maintenance charge once a month prevents deep discharge. ### Manufacturer's warranty The Kronobat SD-45.1T 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 Orders placed **before 6:00 pm** with the battery in stock ship the same day. Delivery in mainland Spain and Portugal takes 24-48 working hours; for the Balearic Islands and the rest of the European Union allow 3 to 5 working days. You have **14 days** to return an unused battery; in mainland Spain and Portugal collection is free. We email you the tracking number as soon as the parcel ships. ## Frequently asked questions ### How do I fit the SD-45.1T model in my car? Allow 15-30 minutes and a 10 mm spanner. If the car keeps its battery in the boot or under a seat, it can take up to twice as long. If the car manufacturer lists any extra step in the handbook, follow it. More detail in how to replace the car battery. The right order: engine off and key out; disconnect the negative (−) first, then the positive (+); release the hold-down clamp, lift out the old battery and seat the new one in the same position (positive on the left), keeping the polarity; reconnect the positive (+) first and the negative (−) last. ### What is the service life of the SD-45.1T model? As a guide, you can expect the Kronobat SD-45.1T to last 4 to 6 years in regular car use without Start-Stop, although the real figure may be higher or lower. What weighs most: temperature (cold makes starts harder and intense heat evaporates the electrolyte), frequent short trips, the condition of the alternator and charging system, power draw while parked and maintenance, not forgetting the type of car and Start-Stop. ### What are the measurements of the SD-45.1T model? Check the room available in your car, because a single millimetre too much can stop the clamp from closing. Its dimensions are 219×135×225 mm, also written 219x135x225 mm; the height already includes the terminals. ### What polarity does the Kronobat SD-45.1T battery have? On the Kronobat SD-45.1T, the polarity is positive on the left. To check, stand the battery in front of you with the terminals nearest you: the positive (+) is the one with the red ring. Compare it with the battery you are replacing: if it does not match, cables must be lengthened or the system reconfigured, with a risk of short circuit. ### Will the Kronobat SD-45.1T battery fit my car? Three routes: the "Compatible vehicles" tab on this page, with the vehicles verified by our technical team; your number plate in the finder, from which DGT/DVLA/KBA detect model and engine; and WhatsApp, with make, model, engine and year, during business hours (Mon–Fri 10:00–13:30 and 16:30–18:00 (Spanish time, CET)). Always cross-check with what the car manufacturer states in the owner's handbook. ### Which batteries are equivalent to the Kronobat SD-45.1T? Not just any technology will do: an EFB cannot be replaced with a conventional battery in Start-Stop cars. The "Equivalents" section further down lists the recommended alternatives. Interchangeable means the same dimensions, same polarity, same Ah and same CCA; for the SD-45.1T, 45 Ah (300 A cranking). ## Equivalent batteries - [VARTA B24](https://baterias.com/gb/battery-varta-b24-12v-45ah-300a) - [TUDOR TB451](https://baterias.com/gb/battery-tudor-tb451-45ah-330a) - [EXIDE EB451](https://baterias.com/gb/battery-exide-eb451-12v-45ah-330a) ## 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 · 2026-11-08*