# Stationary UPS battery Long WPL28-12TM 12V 28Ah AGM ![Stationary UPS battery Long WPL28-12TM 12V 28Ah AGM](https://baterias.com/1299-home_default/battery-long-wpl28-12tm-12v-28ah.jpg) > Long WPL28-12TM 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-wpl28-12tm-12v-28ah - **Language**: en-GB - **Brand**: LONG - **Reference**: BCOM-LONG-WPL28-12TM - **MPN**: WPL28-12TM - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | LONG | | Reference | WPL28-12 TM | | 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 WPL28-12TM 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 WPL28-12TM WPL Series 28Ah 12V 12*V* Voltage 28*Ah* Capacity 9.18*kg* Weight The **12 V**, **28 Ah** **Long WPL28-12TM** stationary battery from the **WPL Series** range with AGM technology is designed for UPS, alarms, telecoms and emergency lighting. It measures 166 Γ— 125 Γ— 176 mm, the format sought by anyone replacing a 28 Ah battery in UPS, alarm and emergency systems. - Maintenance-free for its whole service life. - Sealed and gas-free: suitable for cabinets and offices. - Long float life under permanent charge. - AGM technology: absorbed electrolyte, no spills, can be mounted at an angle. ### What the Long WPL28-12TM is for The Long WPL28-12TM is designed for UPS, alarms, telecoms and emergency lighting: it sits on float charge and responds instantly to a mains failure. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 9.18 kg. ### The Long WPL28-12TM: WPL Series range and AGM technology The **WPL Series** is the Long range the WPL28-12TM 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. AGM means the acid is held in a glass mat instead of floating free. That is why the battery can be installed in the cabin without gases, survives more cycles and recovers its charge quickly. ### Will it fit your current battery tray? In terms of format, the Long WPL28-12TM measures 166 Γ— 125 Γ— 176 mm (length Γ— width Γ— height) and weighs 9.18 kg. Checking the three dimensions and the terminal position before buying avoids the most common mistake when replacing a battery. ### Long: the maker behind the WPL28-12TM 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. At baterias.com we work directly with the manufacturer or its official distributor: real stock, brand-new product and official warranty. ### Care and maintenance Charge with a charger that has an AGM mode: it limits the voltage and protects the glass-fibre separators. Replace all the batteries in the set at once and avoid environments continuously above 25 Β°C. ### Manufacturer's warranty The Long WPL28-12TM 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 [[ks:cutoff]]**: 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 **[[ks:return_days]] 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 WPL28-12TM model AGM? What does this technology offer? Yes. The WPL28-12TM 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 WPL28-12TM 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. ### How long does the Long WPL28-12TM battery last? Expected lifespan of the Long WPL28-12TM 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 size is this battery? 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. ### Which interchangeable batteries are there for this one? 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· 2026-10-05*