# Wheelchair battery Long WP18-12I 12V 18Ah AGM ![Wheelchair battery Long WP18-12I 12V 18Ah AGM](https://baterias.com/1221-home_default/battery-long-wp18-12i-12v-18ah.jpg) > Long WP18-12I wheelchair battery 12V 18Ah AGM. WP Series range. Dimensions 181Γ—76Γ—167 mm. Deep-cycle and sealed, for daily wheelchair and mobility scooter use. **Category:** [Power Wheelchair Batteries](https://baterias.com/gb/batteries-for-electric-wheelchairs) β†’ [LONG](https://baterias.com/gb/long) - **Canonical URL**: https://baterias.com/gb/battery-long-wp18-12i-12v-18ah - **Language**: en-GB - **Brand**: LONG - **Reference**: BCOM-LONG-WP18-12I - **MPN**: WP18-12I - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | LONG | | Reference | WP18-12 I | | Model | WP Series | | Voltage (V) | 12 V | | Largo | 181 cm | | Ancho | 76 cm | | Alto | 167 cm | | Peso | 6.3 kg | | TecnologΓ­a | AGM | | Capacity (C20) | 18 Ah (c20) | | Capacity (C5) | 15.3 Ah (c5) | ## Quick description **Long WP18-12I 12V 18Ah** is a deep-cycle battery for wheelchairs and mobility scooters, optimised to be discharged and recharged daily down to 80 % DOD without losing range. ### Why this wheelchair battery? - **Daily cycling without wear** handles deep discharges without losing capacity - **Sealed AGM/GEL** no maintenance, no risk of spills - **Thousands of useful cycles** over its full lifetime πŸ”Œ Voltage 12 V ⚑ Capacity 18 Ah C20 πŸ“ Dimensions 181Γ—76Γ—167 mm βš™οΈ Technology AGM βš–οΈ Weight 6,3 kg 🏷️ Model WP Series ## Description ## Mobility battery Long WP18-12I WP Series 18Ah 12V 12*V* Voltage 18*Ah* Capacity 6.30*kg* Weight Designed for power wheelchairs, mobility scooters and light electric vehicles, the **Long WP18-12I** from the **WP Series** range offers **18 Ah** of deep-cycle capacity with AGM technology. Measuring 181 Γ— 76 Γ— 167 mm, it is the direct replacement for power wheelchairs and mobility scooters fitted from the factory with a 18 Ah battery of this format. - AGM: faster recharging and better cycle resistance than a conventional battery. - Sealed AGM/GEL: safe indoors and in transport. - No maintenance, no water top-ups. - Approved for air and sea transport (VRLA). ### What the Long WP18-12I is for The Long WP18-12I is designed for power wheelchairs, mobility scooters and light electric vehicles. Wheelchairs and scooters normally use two identical batteries in series: replace them together. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 6.30 kg. ### Size, terminals and hold-down of the Long WP18-12I The Long WP18-12I is made in the 181 Γ— 76 Γ— 167 mm format and weighs 6.30 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 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. ### The Long WP18-12I: WP Series range and AGM technology Within the Long catalogue, the **WP Series** series groups the references designed for this use. The WP18-12I is the 18 Ah model of that family, with the same performance as its siblings in other sizes. 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. ### Usage and maintenance tips Recharge the wheelchair or scooter after each use and do not leave it discharged for days: lead sulphates and loses capacity. Use the original charger or one compatible with the battery technology (AGM/GEL) and always replace both batteries in the set together. ### Manufacturer's warranty The Long WP18-12I 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 Orders placed **before [[ks:cutoff]]** with the battery in stock ship the same day. Delivery in mainland Spain and Portugal takes 24-48 working hours; for the Balearic and Canary Islands and the rest of the European Union allow 3 to 5 working days. You have **[[ks:return_days]] days** to return an unused battery; in mainland Spain and Portugal collection is free. We email you the tracking number as soon as the parcel ships. ## Frequently asked questions ### Is the WP18-12I model AGM? What does this technology offer? Yes. The WP18-12I 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 do I fit the WP18-12I model in my device? 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 WP18-12I model? Expected lifespan of the Long WP18-12I 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 Long WP18-12I battery? Dimensions (length Γ— width Γ— height) are 181Γ—76Γ—167 mm β€” also written as 181x76x167 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· 2026-09-29*