# Stationary UPS battery Q-battery 12LS-2.1 12V 2.1Ah AGM ![Stationary UPS battery Q-battery 12LS-2.1 12V 2.1Ah AGM](https://baterias.com/1500-home_default/battery-q-battery-12ls-2_1-12v-21ah.jpg) > Q-battery 12LS-2.1 stationary UPS battery 12V 2.1Ah AGM. AGM STANDARD range. Dimensions 178×35×60 mm. Long float life for UPS, alarms and standby equipment. **Category:** [Batteries for UPS / UPS](https://baterias.com/gb/batteries-for-sai-ups) → [Q-battery](https://baterias.com/gb/q-battery) - **Canonical URL**: https://baterias.com/gb/battery-q-battery-12ls-2_1-12v-21ah - **Language**: en-GB - **Brand**: Q-battery - **Reference**: BCOM-Q-BATTERY-12LS-2.1 - **EAN**: 4250889610043 - **MPN**: 12LS-2.1 - **Price**: 22,95 € - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | Q-Battery | | Reference | 12 LS-2.1 | | Model | AGM STANDARD | | Voltage (V) | 12 V | | Largo | 178 cm | | Ancho | 35 cm | | Alto | 60 cm | | Peso | 1 kg | | Tecnología | AGM | | Terminal type | F1 (4 75 mm) | | Hold down | G112107 | | Capacity (C20) | 2.1 Ah (c20) | ## Quick description **Q-battery 12LS-2.1 12V 2Ah** is a stationary battery for backup power systems: UPS, alarms, telecom and emergency lighting. Long float-life under permanent charge and instant response to mains outages with no noticeable voltage drop. ### Why this stationary battery? - **Instant response** when the mains drop, no voltage dip - **Long life under 24/7 charge** optimised for permanent service - **Compatible with your system** existing UPS units and alarm control panels 🔌 Voltage 12 V ⚡ Capacity 2 Ah C20 📏 Dimensions 178×35×60 mm ⚙️ Technology AGM ⚖️ Weight 1 kg 🏷️ Model AGM STANDARD ## Description ## Stationary battery Q-Battery 12LS-2.1 2.1Ah 12V 12*V* Voltage 2.1*Ah* Capacity 1*kg* Weight The **Q-Battery 12LS-2.1** with AGM technology is a **2.1 Ah**, **12 V** backup battery for UPS, alarms, telecoms and emergency lighting. It measures 178 × 35 × 60 mm, the format sought by anyone replacing a 2.1 Ah battery in UPS, alarm and emergency systems. - Long float life under permanent charge. - AGM technology: absorbed electrolyte, no spills, can be mounted at an angle. - Maintenance-free for its whole service life. - Sealed and gas-free: suitable for cabinets and offices. ### What the Q-Battery 12LS-2.1 is for Designed for UPS, alarms, telecoms and emergency lighting, the Q-Battery 12LS-2.1 is sealed, gas-free and suitable for technical cabinets and offices. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 1 kg, F1 (4 75mm) terminals and G112107 hold-down. ### Size, terminals and hold-down of the Q-Battery 12LS-2.1 The Q-Battery 12LS-2.1 is made in the 178 × 35 × 60 mm format and weighs 1 kg. It uses a G112107 hold-down and F1 (4 75mm) terminals, the system that anchors and connects it in the vehicle. 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. ### Technology inside the Q-Battery 12LS-2.1 The 12LS-2.1 is one of the Q-Battery references for this type of use; it shares the same manufacturing and quality-control criteria as the rest of the brand's catalogue. In an AGM battery the electrolyte is absorbed in glass-fibre separators: there is no free liquid, it cannot spill and it can be mounted at an angle. That construction lowers internal resistance, speeds up recharging and multiplies cycle life compared with a conventional battery. ### Q-Battery: the maker behind the 12LS-2.1 The Q-Battery catalogue runs from small alarm batteries to large traction monoblocs, always with sealed, maintenance-free technology. All the Q-Battery batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty. ### Warranty and coverage The Q-Battery 12LS-2.1 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. ### How to make it last longer Replace all the batteries in the set at once and avoid environments continuously above 25 °C. Charge with a charger that has an AGM mode: it limits the voltage and protects the glass-fibre separators. ### When you get it and how to return it 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 ### Is this battery AGM? What is it for? Yes. The 12LS-2.1 from Q-battery uses AGM (Absorbent Glass Mat) technology: a sealed lead-acid battery where the electrolyte is absorbed in a glass-fibre mat. It withstands more charge/discharge cycles than a conventional one, handles heat better and is the required technology for devices with advanced Start-Stop and regenerative braking. Expected lifespan: 5-8 years under normal conditions. ### How is the Q-battery 12LS-2.1 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. ### How long does the Q-battery 12LS-2.1 battery last? Expected lifespan of the Q-battery 12LS-2.1 is 5 to 8 years in mild-climate device use with 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 are the dimensions of the Q-battery 12LS-2.1 battery? Dimensions (length × width × height) are 178×35×60 mm — also written as 178x35x60 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. ### Which batteries are equivalent to the Q-battery 12LS-2.1? 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. ## Reviews - **Average rating**: 4.81 / 5 (33 reviews) ## 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 · 2026-09-29*