Deka 8G31 · Wheelchair battery 12V 97.6Ah GEL
Specifications
| Brand | DEKA |
|---|---|
| Part number | 8G31 |
| Voltage (V) | 12 |
| Capacity (C20) | 97.6Ah (c20) |
| Capacity (C10) | 90Ah (c10) |
| Capacity (C5) | 80.5Ah (c5) |
| Technology | GEL |
| Length | 328.40 mm |
| Width | 171.50 mm |
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Deka 8G31 12V 97Ah 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 wearhandles deep discharges without losing capacity
- Sealed AGM/GELno maintenance, no risk of spills
- Thousands of useful cyclesover its full lifetime
Voltage
12 V
Capacity
97 Ah
Dimensions
328×171×237 mm
Technology
GEL
Weight
31,07 kg
Model
DEKA GEL
Pedí la batería un lunes a las 6 y me llegó el martes a las 8
Miguel Angel SuarezEsta web es genial. Y los profesionales que están del otro lado te ayudan y asesoran en lo que necesites.
Adrian RomanGracias por tan buen servicio, necesitamos mas gente que te atienda asi de bien
Martin Caballero
Reviews originally written in Spanish
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Mobility battery Deka 8G31 97.6Ah 12V
12VVoltage
97.6AhCapacity
31.07kgWeight
The 12 V, 97.6 Ah Deka 8G31 with GEL technology is the standard replacement for power wheelchairs, mobility scooters and light electric vehicles. Its 328 × 171 × 237 mm make it the exact replacement for the 97.6 Ah battery fitted as standard to many power wheelchairs and mobility scooters.
- Approved for air and sea transport (VRLA).
- No maintenance, no water top-ups.
- Sealed AGM/GEL: safe indoors and in transport.
- GEL: excellent resistance to deep discharge and long cycle life.
What the Deka 8G31 is for
The Deka 8G31 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 31.07 kg.
Will it fit your current battery tray?
In terms of format, the Deka 8G31 measures 328 × 171 × 237 mm (length × width × height) and weighs 31.07 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.
What Deka does differently
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. At baterias.com we work directly with the manufacturer or its official distributor: real stock, brand-new product and official warranty.
Technology inside the Deka 8G31
Deka builds the 8G31 to the same standards as the rest of its catalogue; what changes between references is capacity, format and terminal position.
A GEL battery is the choice when cycle resistance and safety matter most: no gases, no liquid and thousands of partial discharges in its lifetime.
How to make it last longer
GEL batteries need lower charging voltages: always use a charger with a GEL mode so as not to damage the electrolyte. Use the original charger or one compatible with the battery technology (AGM/GEL) and always replace both batteries in the set together.
Official warranty
The Deka 8G31 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
Order before 6:00 pm 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 14 days to return it if it has not been installed, with free collection on the mainland, and shipment tracking by email.
BCOM-DEKA-8G31
Data sheet
- Brand
- DEKA
- Reference
- 8G31
- Model
- DEKA GEL
- Voltage (V)
- 12
- Length
- 328.40 mm
- Width
- 171.50 mm
- Height
- 237.20 mm
- Weight
- 31.07 Kgs
- Technology
- GEL
- Capacity (C20)
- 97.6Ah (c20)
- Capacity (C10)
- 90Ah (c10)
- Capacity (C5)
- 80.5Ah (c5)
Specific References
- MPN
- 8G31
4,80/5
Latest reviews
Reviews originally written in Spanish
★★★★★Miguel Angel Suarez
25/07/2026Entrega al día siguiente
Pedí la batería un lunes a las 6 y me llegó el martes a las 8
★★★★★Adrian Roman
09/02/2026Buena atención
Esta web es genial. Y los profesionales que están del otro lado te ayudan y asesoran en lo que necesites.
★★★★★Martin Caballero
03/02/2026Se preocupan por el cliente
Gracias por tan buen servicio, necesitamos mas gente que te atienda asi de bien
★★★★★Jordi Gomez
21/01/2026Muy recomendable
Buena experiencia comprando en esta web. Mi DEKA 8G31 me llego al día siguiente de pedirla. Todo ok
★★★★★Jesus Pascual
02/12/2025Entrega muy rápida
Pedí la bateria un lunes a las 7 y me llegó el martes a las 6
Recommended accessories
How to change the battery
Guide to replace a cyclic battery (12V 4-30Ah) for UPS, mobility scooter, alarm or backup device. Estimated time 10-15 minutes. Important: discharge residual voltage before handling.
Step 1. Power off and unplug the device
Unplug the device (UPS, scooter, alarm) and leave it off for at least 30 seconds to discharge residual capacitor voltage. Work on an insulating surface.
Step 2. Locate the battery compartment
Usually under the seat (mobility scooter/wheelchair), in the rear module of the UPS, or behind a side panel with screws. Check the device manual for unusual models.
Step 3. Disconnect the negative (−) first
With insulated gloves, remove the negative (−) cable first. Some UPS have protection fuses — note their position before removing.
Step 4. Disconnect the positive (+) terminal
Repeat with the positive cable (red, marked +). Important: never let a terminal touch metal of the car while the other is still connected.
Step 5. Remove the old battery
Typical weight 1-15 kg depending on capacity. Many cyclic batteries are AGM/GEL — keep them upright. Do NOT invert the battery: even sealed, residue may exist.
Step 6. Fit the new battery
Same orientation and type (AGM, GEL or flooded). Polarity must match the device, not a chassis (this is not a car). Make sure terminals do not touch metal parts of the compartment.
Step 7. Connect the positive (+) first
On cyclic devices the order is reversed compared to cars: positive (+) first, negative (−) afterwards. Tighten without forcing — the plastic terminal housing of cyclic batteries damages easily.
Step 8. Initial charge before first use
Cyclic batteries ship at 60-80%. Before first use, connect the device charger for 8-12 hours (or use an AGM/GEL smart charger if available). This avoids short cycles and extends lifespan.
Frequently asked questions
Is this battery GEL? What is the typical use?
Yes, this model is a GEL battery: sealed lead-acid where the electrolyte is in gel form. It tolerates deep discharges very well and is ideal for cyclic use (solar, motorhomes, electric wheelchairs, motorcycles). Requires a GEL-specific smart charger — max charge voltage ~14.1 V (vs 14.4-14.7 V for AGM). Lifespan 6-10 years.
How do I fit the 8G31 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 (−) 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 — match the polarity shown on the product sheet; 6) connect the positive (+) first, then the negative (−). 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 8G31 model?
Expected lifespan of the Deka 8G31 is 6 to 10 years in cyclic use (marine, caravan, solar) with controlled discharges. 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 Deka 8G31 battery?
Dimensions (length × width × height) are 328×172×237 mm — also written as 328x172x237 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.
What are the equivalents of the 8G31 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 — 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.
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