# Marine battery Varta LL50 12.8V 50Ah Li-Ion ![Marine battery Varta LL50 12.8V 50Ah Li-Ion](https://baterias.com/4496-home_default/lithium-battery-varta-ll50-12-8v-50ah.jpg) > Varta LL50 marine battery 12.8V 50Ah Li-Ion. Official Varta Distributor. Professional Li-Ion Deep Cycle range. Lithium: light, high cycle life. **Category:** [Boat Batteries](https://baterias.com/gb/boat-batteries) → [VARTA](https://baterias.com/gb/varta) - **Canonical URL**: https://baterias.com/gb/lithium-battery-varta-ll50-12-8v-50ah - **Language**: en-GB - **Brand**: VARTA - **Reference**: BCOM-VARTA-LL50 - **EAN**: 4016987166918 - **MPN**: LL50 - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | VARTA | | Reference | LL50 | | Model | Professional Li-Ion Deep Cycle | | Voltage (V) | 12.8 V | | Largo | 195 mm | | Ancho | 132 mm | | Alto | 183 mm | | Tecnología | Li-Ion | | EAN | 4016987166918 | | Terminal layout | Positive terminal on the right | | Hold down | B00 | | Capacity (C20) | 50 Ah (c20) | | Additional ETN | 850050000K31 A | ## Quick description **Varta LL50 12V 50Ah** is a LiFePO4 lithium service battery for boats, designed to power onboard loads (fridge, fishfinder, GPS, lights, inverter) through deep daily discharges. It is not a starting battery: it replaces the lead-acid service bank at around 60 % less weight. ### Why this lithium marine battery? - **Deep-cycle service bank** daily discharges to 80 % with no capacity loss - **60 % less weight on board** the same energy as lead-acid in far less space - **Built-in BMS, maintenance free** protects against overcharge, over-discharge and short circuit 🔌 Voltage 12 V ⚡ Capacity 50 Ah C20 📏 Dimensions 195×132×183 mm ⚙️ Technology Litio (LiFePO4) 🧭 Polarity Positive on the right ⚖️ Weight 6,8 kg 🏷️ Model Professional Li-Ion Deep Cycle ## Description ## Varta LL50 Professional Li-Ion Deep Cycle 50Ah 12.8V Battery 12.8*V* Voltage 50*Ah* Capacity The **Varta LL50 battery** is the **12.8 V**, **50 Ah** from the **Professional Li-Ion Deep Cycle** range, designed for motorhomes, boats and auxiliary power equipment. Its 195 × 132 × 183 mm dimensions and positive terminal on the right make it the exact replacement for the 50 Ah battery fitted as standard in many vehicles. - More endurance on board than a conventional starter battery. - Tolerates deep discharges and repeated recharging without degrading. - Ideal for motorhomes, marine use and domestic power on board. - Dual cycle: it both cranks the engine and powers auxiliary equipment. ### Applications of the Varta LL50 battery Designed for motorhomes, boats and auxiliary power equipment, the Varta LL50 is a direct replacement when you need its same 50 Ah capacity and format. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a B00 hold-down. ### Size and fitting of the Varta LL50 Its outer dimensions are 195 × 132 × 183 mm. The positive terminal on the right determines which side the cables run to: it is the detail that causes the most buying mistakes, so it is worth checking before ordering. It uses a B00 hold-down, the system that anchors it to the vehicle's battery tray. For the swap to be direct, the space your current battery occupies must respect those three dimensions and the same terminal layout; otherwise adapters will be needed or the hold-down will have to change. ### The Varta LL50 and the Professional Li-Ion Deep Cycle range The **Professional Li-Ion Deep Cycle** is Varta’s new lithium (LiFePO4) series for leisure and marine use: far lighter than lead, it withstands thousands of cycles and uses nearly all of its capacity in each discharge. It is the premium choice for motorhomes and boats seeking maximum range and service life at minimum weight, with an integrated battery management system (BMS). The chemistry is built for draining and recharging the battery many times over — the typical pattern in leisure and marine use — where an ordinary car battery would sulphate within weeks. It offers endurance for the on-board equipment and the cranking power to turn the engine over when the moment comes. ### Why choose a Varta battery Varta is a byword for reliability: original equipment in numerous European vehicles and one of the most proven brands on the market. Replacing your battery with a Varta restores OEM quality — the same performance as the factory-fitted unit — with the manufacturer's backing. Behind Varta is Clarios, one of the largest manufacturers of starter batteries in the world and a supplier to the assembly lines of numerous car brands. That German engineering heritage translates into reliable starting year after year. Varta's production combines automated lines with verification of more than 100 parameters per unit; that traceability is what underpins its reputation for reliable starting throughout the battery's life. ### Manufacturer's warranty The Varta LL50 battery comes with the **official manufacturer warranty**. ### Care and maintenance In leisure use, avoiding discharges below 50% of capacity multiplies the number of cycles. A suitable charger and, where possible, a solar regulator keep it healthy through the seasons when it sees less use. To extend its life, recharge it as soon as possible after each discharge and never leave it flat over the winter. A trickle charger is the best investment for getting many cycles out of it. ### Technical sheet Download the official technical sheet for this battery with all the manufacturer data. [Download technical sheet (PDF)](/fichastecnicas/ficha-tecnica-bateria-varta-ll50-50ah-12v-en.pdf) ## Frequently asked questions ### How is the Varta LL50 battery installed in the vehicle? In most boats 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 (−) 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 — match the polarity shown on the product sheet; 6) connect the positive (+) first, then the negative (−). On boats 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 LL50 model? Expected lifespan of the Varta LL50 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 LL50 model? Dimensions (length × width × height) are 195×132×183 mm — also written as 195x132x183 mm — following the European DIN standard. Always measure the space in your boat before buying: even one extra millimetre can prevent the hold-down clamp from closing. The height shown includes the terminals. ### Will the Varta LL50 battery fit my boat? 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 — we reply during business hours (Mon–Fri 10:00–13:30 and 16:40–18:00 (Spanish time, CET)). The LL50 typically fits a wide range of European vehicles thanks to its standard DIN case format. ### Which batteries are equivalent to the Varta LL50? 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 — an EFB cannot be replaced with a conventional battery in Start-Stop boats. 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 — over 25 years of experience validating automotive batteries. → https://baterias.com/gb/technical-team --- *baterias.com — Automotive batteries · 2026-09-28*