# Stationary UPS battery Long WPL28-12TN 12V 28Ah AGM ![Stationary UPS battery Long WPL28-12TN 12V 28Ah AGM](https://baterias.com/1300-home_default/battery-long-wpl28-12tn-12v-28ah.jpg) > Long WPL28-12TN stationary UPS battery 12V 28Ah AGM. WPL Series range. Dimensions 166Γ—125Γ—176 mm. Long float life for UPS, alarms and standby equipment. **Category:** [Stationary Batteries](https://baterias.com/gb/stationary-batteries) β†’ [LONG](https://baterias.com/gb/long) - **Canonical URL**: https://baterias.com/gb/battery-long-wpl28-12tn-12v-28ah - **Language**: en-GB - **Brand**: LONG - **Reference**: BCOM-LONG-WPL28-12TN - **MPN**: WPL28-12TN - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | LONG | | Reference | WPL28-12 TN | | Model | WPL Series | | Voltage (V) | 12 V | | Largo | 166 cm | | Ancho | 125.5 cm | | Alto | 176 cm | | Peso | 9.18 kg | | TecnologΓ­a | AGM | | Capacity (C20) | 28 Ah (c20) | | Capacity (C5) | 23.8 Ah (c5) | ## Quick description **Long WPL28-12TN 12V 28Ah** 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 πŸ”Œ Voltage 12 V ⚑ Capacity 28 Ah C20 πŸ“ Dimensions 166Γ—125Γ—176 mm βš™οΈ Technology AGM βš–οΈ Weight 9,18 kg 🏷️ Model WPL Series ## Description ## Stationary battery Long WPL28-12TN WPL Series 28Ah 12V 12*V* Voltage 28*Ah* Capacity 9.18*kg* Weight The **12 V**, **28 Ah** **Long WPL28-12TN** stationary battery from the **WPL Series** range with AGM technology is designed for UPS, alarms, telecoms and emergency lighting. It replaces the original battery without adaptation in UPS, alarm and emergency systems with a 166 Γ— 125 Γ— 176 mm format: same 28 Ah capacity. - AGM technology: absorbed electrolyte, no spills, can be mounted at an angle. - Long float life under permanent charge. - Sealed and gas-free: suitable for cabinets and offices. - Maintenance-free for its whole service life. ### Dimensions, polarity and mounting It has external dimensions of 166 Γ— 125 Γ— 176 mm and weighs 9.18 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. ### What the Long WPL28-12TN is for With 28 Ah, the Long WPL28-12TN gives your UPS or emergency system the autonomy it needs. Replace all the batteries in the set at once. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 9.18 kg. ### The Long WPL28-12TN: WPL Series range and AGM technology The **WPL Series** is the Long range the WPL28-12TN belongs to: it shares the same construction and quality criteria with the rest of the series, and varies in capacity and format to suit each vehicle. 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. ### What Long does differently 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. At baterias.com we work directly with the manufacturer or its official distributor: real stock, brand-new product and official warranty. ### Warranty and coverage The Long WPL28-12TN 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. ### Care and maintenance Check the float voltage of the UPS or charger: a voltage that is too high shortens the life of a sealed battery. Replace all the batteries in the set at once and avoid environments continuously above 25 Β°C. ### 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 WPL28-12TN from Long 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 Long WPL28-12TN 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 (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 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 WPL28-12TN model? Expected lifespan of the Long WPL28-12TN 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 measurements of the WPL28-12TN model? Dimensions (length Γ— width Γ— height) are 166Γ—126Γ—176 mm β€” also written as 166x126x176 mm β€” 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 WPL28-12TN 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 devices. 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· 2026-09-29*