# Car battery Long 36B20L 12V 40Ah ![Car battery Long 36B20L 12V 40Ah](https://baterias.com/1607-home_default/battery-long-36b20l-12v-40ah.jpg) > Long 36B20L car battery 12V 40Ah. Starting Series range. Dimensions 197Γ—129Γ—227 mm. Check fitment by plate. **Category:** [Car Batteries](https://baterias.com/gb/car-batteries) β†’ [LONG](https://baterias.com/gb/long) - **Canonical URL**: https://baterias.com/gb/battery-long-36b20l-12v-40ah - **Language**: en-GB - **Brand**: LONG - **Reference**: BCOM-LONG-36B20L - **MPN**: 36B20L - **Last updated**: 2026-10-28 - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | LONG | | Reference | 36B20 L | | Model | Starting Series | | Voltage (V) | 12 V | | Largo | 197 cm | | Ancho | 129 cm | | Alto | 227 cm | | Peso | 7.8 kg | | Capacity (C20) | 40 Ah (c20) | | Capacity (C5) | 32 Ah (c5) | ## Quick description **Long 36B20L 12V 40Ah** 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 πŸ”Œ Voltage 12 V ⚑ Capacity 40 Ah C20 πŸ“ Dimensions 197Γ—129Γ—227 mm βš–οΈ Weight 7,8 kg 🏷️ Model Starting Series ## Description ## Car battery Long 36B20L Starting Series 40Ah 12V 12*V* Voltage 40*Ah* Capacity 7.80*kg* Weight The **Long 36B20L car battery** is rated at **12 V**, **40 Ah** from the **Starting Series** range, and is designed for passenger cars with conventional starting, without a Start-Stop system. Measuring 197 Γ— 129 Γ— 227 mm, it is the direct replacement for cars fitted from the factory with a 40 Ah battery of this format. - Low self-discharge: copes with long stops without losing charge. - Stable voltage for the vehicle electronics (ECU, sensors, climate control). - Original-equipment build quality without the dealership price. - Direct replacement for the original battery in size and terminals. ### What the Long 36B20L is for Designed for passenger cars with conventional starting, without a Start-Stop system, the Long 36B20L is the direct replacement when your vehicle uses a 40 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 7.80 kg. ### Dimensions, polarity and mounting The Long 36B20L is made in the 197 Γ— 129 Γ— 227 mm format and weighs 7.80 kg. For a direct replacement, the current battery tray must accept these dimensions and the same terminal layout; otherwise adapters will be needed or the hold-down will change. ### The Long 36B20L within the Starting Series range Within the Long catalogue, the **Starting Series** series groups the references designed for this use. The 36B20L is the 40 Ah model of that family, with the same performance as its siblings in other sizes. ### Why choose Long batteries Long batteries combine large-scale production with ISO quality standards and a batch-to-batch consistency that has made them the de-facto standard in backup systems and electric mobility. We guarantee that every Long arrives new, charged and with the manufacturer's full warranty. ### Warranty and coverage The Long 36B20L 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. ### Care and maintenance 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. 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. ### 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 36B20L model in my car? 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 (βˆ’) 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 β€” match the polarity shown on the product sheet; 6) connect the positive (+) first, then the negative (βˆ’). ### How long does the Long 36B20L battery last? Expected lifespan of the Long 36B20L is 4 to 7 years in regular use (depends on technology and climate). 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 Long 36B20L battery? Dimensions (length Γ— width Γ— height) are 197Γ—129Γ—227 mm β€” also written as 197x129x227 mm β€” 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. ### Will the Long 36B20L 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 β€” we reply during business hours (Mon–Fri 10:00–13:30 and 16:30–18:00 (Spanish time, CET)). The 36B20L typically fits a wide range of European vehicles thanks to its standard DIN case format. ### What are the equivalents of the 36B20L model? 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 β€” 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 β€” automotive battery specialists since 2012. β†’ https://baterias.com/gb/technical-team --- *baterias.com β€” Automotive batteries Β· 2026-11-02*