# Wheelchair battery Deka 8G40 12V 40Ah GEL ![Wheelchair battery Deka 8G40 12V 40Ah GEL](https://baterias.com/1024-home_default/battery-deka-8g40-12v-40ah.jpg) > Deka 8G40 wheelchair battery 12V 40Ah GEL. Dimensions 197×168×174 mm. Deep-cycle and sealed, for daily wheelchair and mobility scooter use. **Category:** [Power Wheelchair Batteries](https://baterias.com/gb/batteries-for-electric-wheelchairs) → [DEKA](https://baterias.com/gb/deka) - **Canonical URL**: https://baterias.com/gb/battery-deka-8g40-12v-40ah - **Language**: en-GB - **Brand**: DEKA - **Reference**: BCOM-DEKA-8G40 - **MPN**: 8G40 - **Last updated**: 2026-08-07 - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | DEKA | | Reference | 8G40 | | Model | DEKA GEL | | Voltage (V) | 12 V | | Largo | 197.1 mm | | Ancho | 168.1 mm | | Alto | 174.8 mm | | Peso | 14.29 kg | | Tecnología | GEL | | Capacity (C20) | 40 Ah (c20) | | Capacity (C10) | 37 Ah (c10) | | Capacity (C5) | 34 Ah (c5) | ## Quick description **Deka 8G40 12V 40Ah** 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 🔌 Voltage 12 V ⚡ Capacity 40 Ah C20 📏 Dimensions 197×168×174 mm ⚙️ Technology GEL ⚖️ Weight 14,29 kg 🏷️ Model DEKA GEL ## Description ## Mobility battery Deka 8G40 40Ah 12V 12*V* Voltage 40*Ah* Capacity 14.29*kg* Weight The **Deka 8G40** with GEL technology delivers **40 Ah** at **12 V** with the cycle life that power wheelchairs, mobility scooters and light electric vehicles demand. It measures 197 × 168 × 174 mm, the format sought by anyone replacing a 40 Ah battery in power wheelchairs and mobility scooters. - Standard replacement format for wheelchairs and scooters. - Thousands of useful cycles over its lifetime. - Designed to be discharged and recharged daily without losing capacity. - GEL technology: gelled electrolyte, fully sealed and maintenance-free. ### What the Deka 8G40 is for The Deka 8G40 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 14.29 kg. ### Technology inside the Deka 8G40 Deka builds the 8G40 to the same standards as the rest of its catalogue; what changes between references is capacity, format and terminal position. GEL technology fixes the acid in a solid gel. That removes maintenance and leaks and gives very long cycle life, in exchange for slightly slower recharging and lower peak current than an AGM. ### Size, terminals and hold-down of the Deka 8G40 In terms of format, the Deka 8G40 measures 197 × 168 × 174 mm (length × width × height) and weighs 14.29 kg. For a direct replacement, the current battery tray must accept these dimensions and the same terminal layout; otherwise adapters will be needed or the hold-down will change. ### Why choose Deka batteries Deka (East Penn Manufacturing) is the largest single-site lead battery manufacturer in the United States, with full control of the process from lead recycling to the finished battery. We guarantee that every Deka arrives new, charged and with the manufacturer's full warranty. ### How to make it last longer Use the original charger or one compatible with the battery technology (AGM/GEL) and always replace both batteries in the set together. Recharge the wheelchair or scooter after each use and do not leave it discharged for days: lead sulphates and loses capacity. ### Warranty and coverage The Deka 8G40 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 6:00 pm** with the battery in stock ship the same day. Delivery in mainland Spain and Portugal takes 24-48 working hours; for the Balearic Islands and the rest of the European Union allow 3 to 5 working days. You have **14 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 this battery GEL? What is the typical use? Yes, GEL technology (40 Ah): a sealed lead-acid battery whose electrolyte is in gel form. Designed for cyclic use (solar installations, motorhomes, electric wheelchairs, motorcycles), it tolerates deep discharges very well. It needs a GEL-specific smart charger: its maximum charge voltage is lower than that of an AGM. ### What are the dimensions of the Deka 8G40 battery? Check the room available in your device, because a single millimetre too much can stop the clamp from closing. Its dimensions are 197×168×175 mm, also written 197x168x175 mm; the height already includes the terminals. ### Deka 8G40 or MK Powered M40-12 SLD G: which one to choose? It has the same dimensions, voltage and technology as the 8G40, although it is not a manufacturer-approved equivalent. Compared with the 8G40 it has 225 A of cold cranking more. It costs €180.80 more. Check the positive terminal side and the original capacity before ordering; otherwise it is a straight swap. ## 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 · 2026-11-10*