# Car battery Long 36B20R(S) 12V 40Ah ![Car battery Long 36B20R(S) 12V 40Ah](https://baterias.com/1609-home_default/battery-long-36b20rs-12v-40ah.jpg) > Long 36B20R(S) 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-36b20rs-12v-40ah - **Language**: en-GB - **Brand**: LONG - **Reference**: BCOM-LONG-36B20R(S) - **MPN**: 36B20R(S) - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | LONG | | Reference | 36B20 R(S) | | 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 36B20R(S) 12V 40Ah** 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 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 36B20R(S) Starting Series 40Ah 12V 12*V* Voltage 40*Ah* Capacity 7.80*kg* Weight With **40 Ah** at **12 V**, the **Long 36B20R(S)** from the **Starting Series** range is a starter battery built for passenger cars with conventional starting, without a Start-Stop system. Its 197 Γ— 129 Γ— 227 mm make it the exact replacement for the 40 Ah battery fitted as standard to many cars. - Low self-discharge: copes with long stops without losing charge. - Designed to last several years under normal daily use. - Direct replacement for the original battery in size and terminals. - Reliable cold starts, even after weeks without driving. ### What the Long 36B20R(S) is for With 40 Ah, the Long 36B20R(S) is sized for passenger cars with conventional starting, without a Start-Stop system. It is a direct replacement for the original battery as long as dimensions and terminals match. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 7.80 kg. ### Size, terminals and hold-down of the Long 36B20R(S) It has external dimensions of 197 Γ— 129 Γ— 227 mm 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. ### 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. All the Long batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty. ### The Long 36B20R(S) within the Starting Series range The 36B20R(S) is part of the Long **Starting Series** range. Choosing the right reference within the series comes down to capacity, dimensions and terminals: technology and quality are common to the whole family. ### 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. ### Manufacturer's warranty The Long 36B20R(S) 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. ### Delivery times and returns Same-day dispatch from our warehouse for in-stock orders placed **before [[ks:cutoff]]**: 24-48 working hours in mainland Spain and Portugal, 3 to 5 days in the islands and the rest of Europe. Returns are accepted for **[[ks:return_days]] days** if the battery has not been used (free collection on the Iberian mainland). You will receive tracking by email. ## Frequently asked questions ### How do I fit the 36B20R(S) 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 this page. 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’). On cars with Start-Stop or BMS, register the battery via OBD so the alternator applies the correct charging profile. ### How long does the Long 36B20R(S) battery last? Expected lifespan of the Long 36B20R(S) 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 36B20R(S) 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 36B20R(S) 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 16:40–18:00 (Spanish time, CET)). The 36B20R(S) typically fits a wide range of European vehicles thanks to its standard DIN case format. ### Which interchangeable batteries are there for this one? 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€” over 25 years of experience validating automotive batteries. β†’ https://baterias.com/gb/technical-team --- *baterias.com β€” Automotive batteries Β· 2026-10-04*