# Stationary UPS battery Long WPL28-12T 12V 28Ah AGM ![Stationary UPS battery Long WPL28-12T 12V 28Ah AGM](https://baterias.com/1298-home_default/battery-long-wpl28-12t-12v-28ah.jpg) > Long WPL28-12T stationary UPS battery 12V 28Ah AGM. WPL Series range. Dimensions 166×125×176 mm. Long float life for UPS, alarms and standby equipment. **Category:** [Stationary Batteries](https://baterias.com/gb/stationary-batteries) → [LONG](https://baterias.com/gb/long) - **Canonical URL**: https://baterias.com/gb/battery-long-wpl28-12t-12v-28ah - **Language**: en-GB - **Brand**: LONG - **Reference**: BCOM-LONG-WPL28-12T - **MPN**: WPL28-12T - **Last updated**: 2026-10-28 - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | LONG | | Reference | WPL28-12 T | | Model | WPL Series | | Voltage (V) | 12 V | | Largo | 166 cm | | Ancho | 125.5 cm | | Alto | 176 cm | | Peso | 9.18 kg | | Tecnología | AGM | | Capacity (C20) | 28 Ah (c20) | | Capacity (C5) | 23.8 Ah (c5) | ## Quick description **Long WPL28-12T 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 🔌 Voltage 12 V ⚡ Capacity 28 Ah C20 📏 Dimensions 166×125×176 mm ⚙️ Technology AGM ⚖️ Weight 9,18 kg 🏷️ Model WPL Series ## Description ## Stationary battery Long WPL28-12T WPL Series 28Ah 12V 12*V* Voltage 28*Ah* Capacity 9.18*kg* Weight The **12 V**, **28 Ah** **Long WPL28-12T** stationary battery from the **WPL Series** range with AGM technology is designed for UPS, alarms, telecoms and emergency lighting. Its 166 × 125 × 176 mm make it the exact replacement for the 28 Ah battery fitted as standard to many UPS, alarm and emergency systems. - Instant response to mains failures. - AGM: faster recharging and better cycle resistance than a conventional battery. - Standard format for UPS and emergency systems. - Low self-discharge and high reliability. ### What the Long WPL28-12T is for With 28 Ah, the Long WPL28-12T 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. ### Dimensions, polarity and mounting The Long WPL28-12T is made in the 166 × 125 × 176 mm format 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 Long does differently 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. ### The Long WPL28-12T: WPL Series range and AGM technology The WPL28-12T is part of the Long **WPL Series** 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 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. ### How to make it last longer Replace all the batteries in the set at once and avoid environments continuously above 25 °C. Check the float voltage of the UPS or charger: a voltage that is too high shortens the life of a sealed battery. ### Official warranty The Long WPL28-12T 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. ### 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 ### Is the WPL28-12T model AGM? What does this technology offer? Yes. The WPL28-12T 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. ### What are the measurements of the WPL28-12T model? Dimensions (length × width × height) are 166×126×176 mm — also written as 166x126x176 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. ## Technical team (editorial authorship) The FAQs, guides and comparisons on this site are reviewed by the baterias.com technical team — automotive battery specialists since 2012. → https://baterias.com/gb/technical-team --- *baterias.com — Automotive batteries · 2026-11-01*