# Car battery Long 115F51 12V 120Ah ![Car battery Long 115F51 12V 120Ah](https://baterias.com/1360-home_default/battery-long-115f51-12v-120ah.jpg) > Long 115F51 car battery 12V 120Ah. Starting Series range. Dimensions 502Γ—180Γ—255 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-115f51-12v-120ah - **Language**: en-GB - **Brand**: LONG - **Reference**: BCOM-LONG-115F51 - **MPN**: 115F51 - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | LONG | | Reference | 115F51 | | Model | Starting Series | | Voltage (V) | 12 V | | Largo | 502 cm | | Ancho | 180 cm | | Alto | 255.5 cm | | Peso | 20.77 kg | | Capacity (C20) | 120 Ah (c20) | | Capacity (C5) | 96 Ah (c5) | ## Quick description **Long 115F51 12V 120Ah** 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 πŸ”Œ Voltage 12 V ⚑ Capacity 120 Ah C20 πŸ“ Dimensions 502Γ—180Γ—255 mm βš–οΈ Weight 20,77 kg 🏷️ Model Starting Series ## Description ## Car battery Long 115F51 Starting Series 120Ah 12V 12*V* Voltage 120*Ah* Capacity 20.77*kg* Weight The **Long 115F51** from the **Starting Series** range delivers **120 Ah** 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 502 Γ— 180 Γ— 255 mm format: same 120 Ah capacity. - 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. - Designed to last several years under normal daily use. ### What the Long 115F51 is for The Long 115F51 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 20.77 kg. ### The Long 115F51 within the Starting Series range Within the Long catalogue, the **Starting Series** series groups the references designed for this use. The 115F51 is the 120 Ah model of that family, with the same performance as its siblings in other sizes. ### Size, terminals and hold-down of the Long 115F51 The Long 115F51 is made in the 502 Γ— 180 Γ— 255 mm format and weighs 20.77 kg. Before replacing it, measure your current battery tray: if all three dimensions and the terminal positions match, the swap is direct and needs no adapters. ### Why choose Long batteries Long (Kung Long Batteries) is one of the world's largest manufacturers of sealed VRLA batteries. Its AGM and GEL series for UPS, mobility, alarms and cycling are found in equipment worldwide as original equipment. We guarantee that every Long arrives new, charged and with the manufacturer's full warranty. ### 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. ### Warranty and coverage The Long 115F51 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 Same-day dispatch from our warehouse for in-stock orders placed **before 6:00 pm**: 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 **14 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 115F51 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’). On cars with Start-Stop or BMS, register the battery via OBD so the alternator applies the correct charging profile. ### What is the service life of the 115F51 model? Expected lifespan of the Long 115F51 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 measurements of the 115F51 model? Dimensions (length Γ— width Γ— height) are 502Γ—180Γ—256 mm β€” also written as 502x180x256 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. ### Does this 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 115F51 typically fits a wide range of European vehicles thanks to its standard DIN case format. ### What are the equivalents of the 115F51 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· 2026-10-26*