# Kronobat SD-40.0B · Car battery 12V 40Ah 340A ![Kronobat SD-40.0B · Car battery 12V 40Ah 340A](https://bateriasonline.es/2292-home_default/kronobat-sd-40-0b.jpg) > Kronobat SD-40.0B: 40 Ah car battery, 340 A (EN), 175×175×190 mm, positive terminal on the right, L0 case. Equivalent to Exide EC400. **Category:** [Car batteries](https://bateriasonline.es/en/car-batteries) → [Kronobat](https://bateriasonline.es/en/kronobat-batteries) - **Canonical URL**: https://bateriasonline.es/en/kronobat-sd-40-0b - **Language**: en - **Brand**: Kronobat - **Reference**: BOL-KRONOBAT-SD-40.0B - **MPN**: SD-40.0B - **Price**: 73,60 € (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 | 40 Ah | | Cold cranking amps (EN) | 340 A | | Length | 175 mm | | Width | 175 mm | | Height | 190 mm | | Weight | 10.9 kg | | Polarity | Positive terminal on the right | | Case size | L0 (175 × 175 × 190 mm) | ## Quick description The Kronobat SD-40.0B is a car battery with 12 V, 40 Ah and 340 A cold cranking current, case size L0 (175 × 175 × 190 mm), with the positive terminal on the right. ## Description ## Who the Kronobat SD-40.0B is for The Kronobat SD-40.0B 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 40 Ah it is a small size: the usual choice for petrol superminis and city cars with little equipment. The SD-40.0B belongs to the Kronobat STANDARD range. [More Kronobat batteries](https://bateriasonline.es/en/kronobat-batteries) ## Kronobat SD-40.0B vs PB-44.0 and SD-45.0: differences Torn between the SD-40.0B and another similar Kronobat? This is what changes: | Model | Capacity | Cold cranking (EN) | Dimensions (mm) | Positive | Weight | |---|---|---|---|---|---| | Kronobat SD-40.0B (this one) | 40 Ah | 340 A | 175 × 175 × 190 | right | 10.9 kg | | Kronobat PB-44.0 | 44 Ah | 420 A | 175 × 175 × 190 | right | 11.5 kg | | Kronobat SD-45.0 | 45 Ah | 400 A | 207 × 175 × 190 | right | 11.7 kg | - Kronobat PB-44.0: 4 Ah more, 80 A more cranking power, the same L0 case. - Kronobat SD-45.0: 5 Ah more, 60 A more cranking power, a different case (207 × 175 × 190 mm). ## Kronobat SD-40.0B codes and part numbers Look for any of these SD-40.0B codes on your current battery or in the manufacturer's catalogue: | Commercial reference | SD-40.0B | |---|---| | Case size (EN) | L0 | | Not to be confused with | Kronobat SD-70.0B (70 Ah, 640 A), Kronobat SD-41.0B (41 Ah, 360 A) | ## Equivalents and alternatives to the Kronobat SD-40.0B Same dimensions and polarity as the SD-40.0B, with similar capacity and cranking power; as a conventional battery, the SD-40.0B can also be replaced by an EFB or AGM of the same size if you want more cycles. | Model | Technology | Capacity | Cold cranking (EN) | Dimensions (mm) | |---|---|---|---|---| | Varta A16 | Lead-acid | 40 Ah | 340 A | 175 × 175 × 190 | | Exide EC400 | Lead-acid | 40 Ah | 320 A | 175 × 175 × 190 | | Tudor TC400 | Lead-acid | 40 Ah | 320 A | 175 × 175 × 190 | | Fulmen FC400 | Lead-acid | 40 Ah | 320 A | 175 × 175 × 190 | | Deta DC400 | Lead-acid | 40 Ah | 320 A | 175 × 175 × 190 | ## What to look at before buying the SD-40.0B - The SD-40.0B needs 175 × 175 × 190 mm of space (European case size L0): measure it with the hold-down clamp in place. - The SD-40.0B has the positive terminal on the right: compare it with your current battery. - Your current battery should say about 40 Ah; a little more is also fine. - Cold cranking: 340 A (EN), equal to or higher than the original. - If your car has Start-Stop, the SD-40.0B is not the right one: it needs an EFB or an AGM. ## What it means that the SD-40.0B is lead-acid The SD-40.0B is a conventional lead-acid battery, with plates immersed in liquid electrolyte. In cars without energy management, the SD-40.0B needs no special registration: just connect it. ## Frequently asked questions about the Kronobat SD-40.0B ### Kronobat SD-40.0B or PB-44.0? Compared with the SD-40.0B, the Kronobat PB-44.0 has 4 Ah more and 80 A more cranking power. If your current battery says 420 A or more, choose the PB-44.0; if it says 340 A or less, the SD-40.0B is enough. Both measure 175 × 175 × 190 mm, so they fit the same tray. ### Can the Kronobat SD-40.0B be used in a car with Start-Stop? No. The SD-40.0B 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-40.0B weigh? The SD-40.0B weighs 10.9 kg. For reference, the Kronobat PB-44.0 (44 Ah) weighs 11.5 kg. ### Which battery is equivalent to the Kronobat SD-40.0B? With the same dimensions, polarity and similar capacity you have the Varta A16, Exide EC400 and Tudor TC400. As the SD-40.0B is a conventional battery, an EFB or AGM of the same size also works. ### What case size is the Kronobat SD-40.0B? Case size L0: 175 × 175 × 190 mm. The SD-40.0B fits any standard L0 battery tray such as the Varta A16. ### Which side is the positive terminal on the Kronobat SD-40.0B? The SD-40.0B has the positive terminal on the right, looking at the battery from its long side with the terminals closest to you. ### Which charger does the Kronobat SD-40.0B need? An automatic lead-acid charger with cut-off or maintenance mode, rated at 10 to 20% of its capacity in amps. If it is a vented type, check the electrolyte level and top up only with distilled water. ## Other options if you are unsure about the SD-40.0B - [All car batteries](https://bateriasonline.es/en/car-batteries) - [The whole Kronobat range](https://bateriasonline.es/en/kronobat-batteries) - [Varta A16](https://bateriasonline.es/en/varta-a16) · 40 Ah, 340 A, 175×175×190 mm - [Exide EC400](https://bateriasonline.es/en/exide-ec400) · 40 Ah, 320 A, 175×175×190 mm --- *bateriasonline.es — Batteries and accessories · 2026-11-10*