# Caravan battery Q-battery 12SEM-120 12V 120Ah ![Caravan battery Q-battery 12SEM-120 12V 120Ah](https://baterias.com/1535-home_default/battery-q-battery-12sem-120-12v-120ah.jpg) > Q-battery 12SEM-120 caravan battery 12V 120Ah. SEMITRACTION BATTERY range. Dimensions 347×175×234 mm, + terminal on the right. For your on-board services. **Category:** [Mobility Vehicle Batteries](https://baterias.com/gb/batteries-for-mobility-vehicles) → [Q-battery](https://baterias.com/gb/q-battery) - **Canonical URL**: https://baterias.com/gb/battery-q-battery-12sem-120-12v-120ah - **Language**: en-GB - **Brand**: Q-battery - **Reference**: BCOM-Q-BATTERY-12SEM-120 - **MPN**: 12SEM-120 - **Price**: 238,20 € - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | Q-Battery | | Reference | 12 SEM-120 | | Model | SEMITRACTION BATTERY | | Voltage (V) | 12 V | | Largo | 347 cm | | Ancho | 175 cm | | Alto | 234 cm | | Peso | 29.9 kg | | Tecnología | Lead-acid | | Terminal layout | Positive terminal on the right | | Terminal type | A-Pole | | Hold down | B0 | | Capacity (C20) | 120 Ah (c20) | ## Quick description **Q-battery 12SEM-120 12V 120Ah** is a leisure battery for campers, motorhomes and caravans. Designed to power the entire interior kit (fridge, heater, water pump, USB, LED lighting) for several days off-grid, with no need to plug into a campsite hookup. ## Why this caravan battery? - **Real off-grid autonomy** no campsite hookup needed - **Lasts the whole season** handles daily discharges without capacity loss - **Powers it all at once** fridge, water pump, LED and USB without issues 🔌 Voltage 12 V ⚡ Capacity 120 Ah C20 📏 Dimensions 347×175×234 mm ⚙️ Technology Lead-acid 🧭 Polarity Positive on the right ⚖️ Weight 29,9 kg 🏷️ Model SEMITRACTION BATTERY ## Description ## Mobility battery Q-Battery 12SEM-120 Semitraction Battery 120Ah 12V 12*V* Voltage 120*Ah* Capacity 29.90*kg* Weight Designed for power wheelchairs, mobility scooters and light electric vehicles, the **Q-Battery 12SEM-120** from the **Semitraction Battery** range offers **120 Ah** of deep-cycle capacity with conventional lead-acid technology. Measuring 347 × 175 × 234 mm and the positive terminal on the right, it is the direct replacement for power wheelchairs and mobility scooters fitted from the factory with a 120 Ah battery of this format. - Good balance of capacity, cranking power and price. - Sealed AGM/GEL: safe indoors and in transport. - No maintenance, no water top-ups. - Approved for air and sea transport (VRLA). ### What the Q-Battery 12SEM-120 is for The Q-Battery 12SEM-120 is the usual replacement in power wheelchairs, mobility scooters and light electric vehicles. Recharge after each use and avoid leaving it discharged for days. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 29.90 kg, A-Pole terminals and B0 hold-down. ### Will it fit your current battery tray? It has external dimensions of 347 × 175 × 234 mm and weighs 29.90 kg. The positive terminal on the right decides which side the cables end up on: it is the detail that causes most buying mistakes, so check it before ordering. It uses a B0 hold-down and A-Pole terminals, the system that anchors and connects it in the vehicle. 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. ### Q-Battery: the maker behind the 12SEM-120 The Q-Battery catalogue runs from small alarm batteries to large traction monoblocs, always with sealed, maintenance-free technology. At baterias.com we work directly with the manufacturer or its official distributor: real stock, brand-new product and official warranty. ### The Q-Battery 12SEM-120: Semitraction Battery range and conventional lead-acid technology The 12SEM-120 is part of the Q-Battery **Semitraction Battery** range. Choosing the right reference within the series comes down to capacity, dimensions and terminals: technology and quality are common to the whole family. In a conventional battery the electrolyte is liquid and the lead plates are immersed in it. It is a mature, economical and easily recycled technology, ideal for starting vehicles in normal use. ### Usage and maintenance tips Use the original charger or one compatible with the battery technology (AGM/GEL) and always replace both batteries in the set together. On batteries with filler caps, check the electrolyte level and top up only with distilled water. ### Manufacturer's warranty The Q-Battery 12SEM-120 comes with the **manufacturer's official warranty** against manufacturing defects. If it fails through a defect within the warranty period, we replace it at no cost to you. ### Shipping, delivery and returns Order **before [[ks:cutoff]]** with stock available and it leaves today: mainland Spain and Portugal receive it in 24-48 working hours, the islands and the rest of the EU in 3 to 5 days. You have **[[ks:return_days]] days** to return it if it has not been installed, with free collection on the mainland, and shipment tracking by email. ## Frequently asked questions ### How is the Q-battery 12SEM-120 battery installed in the vehicle? In most devices 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 devices 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 12SEM-120 model? Expected lifespan of the Q-battery 12SEM-120 is 4 to 6 years in regular device use without Start-Stop. 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 size is this battery? Dimensions (length × width × height) are 347×175×234 mm — also written as 347x175x234 mm — following the European DIN standard. Always measure the space in your device before buying: even one extra millimetre can prevent the hold-down clamp from closing. The height shown includes the terminals. ### What are the equivalents of the 12SEM-120 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 — an EFB cannot be replaced with a conventional battery in Start-Stop devices. See the "Equivalents" section to view recommended options at the same performance level. ## Equivalent batteries - [VARTA I9](https://baterias.com/gb/battery-varta-i9-12v-120ah-780a) ## Technical team (editorial authorship) The FAQs, guides and comparisons on this site are reviewed by the baterias.com technical team — automotive battery specialists since 2015. → https://baterias.com/gb/technical-team --- *baterias.com — Automotive batteries · 2026-10-09*