# Car battery Kronobat SD-40.0B 12V 40Ah 340A ![Car battery Kronobat SD-40.0B 12V 40Ah 340A](https://baterias.com/3275-home_default/best-price-battery-12v-40ah-sd-40_0b.jpg) > Kronobat SD-40.0B car battery 12V 40Ah 340A. STANDARD range. Dimensions 175×175×190 mm, + terminal on the right. 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-40ah-sd-40_0b - **Language**: en-GB - **Brand**: KRONOBAT - **Reference**: BCOM-KRONOBAT-SD-40.0B - **MPN**: SD-40.0B - **Price**: 75,10 € (VAT incl., Spain) - **Last updated**: 2026-08-30 - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Reference | SD-40 B | | Model | STANDARD | | Voltage (V) | 12 V | | Largo | 175 mm | | Ancho | 175 mm | | Alto | 190 mm | | Peso | 10.9 kg | | Tecnología | Lead-acid | | Terminal layout | Positive terminal on the right | | Terminal type | 1 | | Cold cranking amps (EN) | 340 A | | Capacity (C20) | 40 Ah (c20) | ## Quick description **Kronobat SD-40.0B 12V 40Ah 340A** is a starter battery with OEM-equivalent quality, designed for modern passenger cars. Delivers reliable cold-cranks even after weeks of inactivity and supports stable auxiliary loads (lights, 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 40 Ah C20 🔋 Cold cranking 340 A EN-1 📏 Dimensions 175×175×190 mm ⚙️ Technology Lead-acid 🧭 Polarity Positive on the right ⚖️ Weight 10,9 kg 🏷️ Model STANDARD ## Description ## Car battery Kronobat SD-40.0B Standard 40Ah 340A 12V 12*V* Voltage 40*Ah* Capacity 340*A* Cold cranking 10.90*kg* Weight The **Kronobat SD-40.0B car battery** is rated at **12 V**, **40 Ah** and **340 A** of cold cranking current (EN) from the **Standard** range, and is designed for passenger cars with conventional starting, without a Start-Stop system. It measures 175 × 175 × 190 mm and the positive terminal on the right, the format sought by anyone replacing a 40 Ah battery in cars. - Reliable cold starts, even after weeks without driving. - Conventional lead-acid: the most proven and economical technology. - Original-equipment build quality without the dealership price. - Direct replacement for the original battery in size and terminals. ### What the Kronobat SD-40.0B is for The Kronobat SD-40.0B 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 10.90 kg and 1.0 terminals. ### Will it fit your current battery tray? In terms of format, the Kronobat SD-40.0B measures 175 × 175 × 190 mm (length × width × height) and weighs 10.90 kg. The positive terminal on the right 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. ### The Kronobat SD-40.0B: Standard range and conventional lead-acid technology The **Standard** is the Kronobat range the SD-40.0B belongs to: it shares the same construction and quality criteria with the rest of the series, and varies in capacity and format to suit each vehicle. 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. ### Why choose Kronobat batteries 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. All the Kronobat batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty. ### Manufacturer's warranty The Kronobat SD-40.0B 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. ### Usage and maintenance tips Keep the terminals clean and tight, and check that the resting voltage does not drop below 12.4 V: below that it is time to recharge. 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. ### Delivery times and returns 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-40.0B model in my car? Steps: 1) switch off and remove the key; 2) find the battery (bonnet, boot or under a seat); 3) undo the negative (−), then the positive (+); 4) remove the clamp and the old battery; 5) fit the new one facing the same way (positive on the right) to match the polarity; 6) connect the positive (+) and finally the negative (−). With a 10 mm spanner, swapping in the Kronobat SD-40.0B takes 15 to 30 minutes on most cars; if the battery sits in the boot or under a seat, allow up to twice as long. Our blog guide covers it in detail; if the owner's handbook describes a different procedure, follow the manufacturer. ### What is the service life of the SD-40.0B model? As a guide, you can expect the Kronobat SD-40.0B to last 4 to 6 years in regular car use without Start-Stop, although the real figure may be higher or lower. Many factors play a part: how it is used (lots of short trips, for example), temperature (cold makes every start harder and intense heat evaporates the electrolyte), the condition of the alternator and charging system, power drawn with the engine off and maintenance, as well as the type of car and whether it has Start-Stop. ### What are the dimensions of the Kronobat SD-40.0B battery? Length × width × height: 175x175x190 mm. Height is measured to the top of the terminals. Measure your car's battery tray first; if the battery exceeds it by even a millimetre, the hold-down clamp may not close. ### On which side is the positive of the SD-40.0B model? On the Kronobat SD-40.0B, the polarity is positive on the right. 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-40.0B battery fit my car? For your own vehicle: type your number plate into the finder (DGT/DVLA/KBA identify model and engine), check the "Compatible vehicles" tab below, listing vehicles verified by our technical team, or message us on WhatsApp with make, model, engine and year; we reply during business hours (Mon–Fri 10:00–13:30 and 16:30–18:00 (Spanish time, CET)). If our table and the car handbook disagree, go with what the manufacturer says. The SD-40.0B typically fits a wide range of European vehicles thanks to its standard DIN case format. ### Which batteries are equivalent to the Kronobat SD-40.0B? Interchangeable means the same dimensions, same polarity, same Ah and same CCA; for the SD-40.0B, 40 Ah (340 A cranking). The "Equivalents" section of this page gathers the recommended options with equivalent performance; remember that in Start-Stop cars an EFB should not be replaced with a conventional battery. ### Kronobat SD-40.0B or Varta A10: which one to choose? The AGM of this size: what cars with Start-Stop and regenerative braking fit from the factory, and a real durability upgrade over the SD-40.0B. Compared with the SD-40.0B it has 80 A of cold cranking more. It costs 30,50 € more. Essential if your car has Start-Stop, regenerative braking or came with AGM; without those systems it is an upgrade you do not need to pay for. ### Kronobat SD-40.0B or Varta A16: which one to choose? The Varta alternative that fits where the SD-40.0B goes, with the same polarity. Compared with the SD-40.0B it has the same Ah and cranking power. It costs 9,80 € less. A straight swap with nothing to adapt; the difference is the price and the brand you prefer. ## Equivalent batteries - [VARTA A16](https://baterias.com/gb/battery-varta-a16-12v-40ah-340a) ## 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 · 2026-11-07*