Deka 8G27 · Wheelchair battery 12V 88Ah GEL

Battery DEKA 8G27 12V 88Ah GEL
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  • Battery DEKA 8G27 12V 88Ah GEL

Specifications

BrandDEKA
Part number8G27
Voltage (V)12V
Capacity (C5)72Ah (c5)
TechnologyGEL

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4,77· 37 reseñas
4,77/5★★★★★37 reviewsVerified purchases
  • ★★★★★Luis Gallego: Pedí la bateria un lunes a las 7 y me llegó el martes a las 6
  • ★★★★★Sergio IbaÑez: Pedí la batería un lunes a las 6 y me llegó el martes a las 8
  • ★★★★★Eduardo Alvarez: Esta web es genial. Y los profesionales que están del otro lado te ayudan y asesoran en lo que necesites.
See all 37 reviews

Deka 8G27 12V 88Ah 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
88 Ah C20
Dimensions
325×166×241 mm
Technology
GEL
Weight
28,12 kg
Model
DEKA GEL
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Mobility battery Deka 8G27 72Ah 12V

12VVoltage
72AhCapacity
28.12kgWeight

The 12 V, 72 Ah Deka 8G27 with GEL technology is the standard replacement for power wheelchairs, mobility scooters and light electric vehicles. It replaces the original battery without adaptation in power wheelchairs and mobility scooters with a 326 × 167 × 241 mm format: same 72 Ah capacity.

  • Thousands of useful cycles over its lifetime.
  • Standard replacement format for wheelchairs and scooters.
  • GEL technology: gelled electrolyte, fully sealed and maintenance-free.
  • Designed to be discharged and recharged daily without losing capacity.

What the Deka 8G27 is for

The Deka 8G27 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 28.12 kg.

Dimensions, polarity and mounting

It has external dimensions of 326 × 167 × 241 mm and weighs 28.12 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.

Technology inside the Deka 8G27

Deka builds the 8G27 to the same standards as the rest of its catalogue; what changes between references is capacity, format and terminal position.

In a GEL battery the electrolyte is gelled with silica: it is fully sealed, cannot spill and tolerates deep discharge very well. It is the preferred technology in electric mobility, marine service and heavy-cycling applications.

Deka: the maker behind the 8G27

Deka batteries are known for their robust construction and consistent quality in automotive, marine, leisure and industrial use. All the Deka batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty.

Official warranty

The Deka 8G27 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.

Care and maintenance

Use the original charger or one compatible with the battery technology (AGM/GEL) and always replace both batteries in the set together. GEL batteries need lower charging voltages: always use a charger with a GEL mode so as not to damage the electrolyte.

Delivery times and returns

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.

BCOM-DEKA-8G27

Data sheet

Voltage (V)
12V
Technology
GEL
Capacity (C5)
72Ah (c5)

Specific References

MPN
8G27
4,77/5
★★★★★37 reviews
Verified purchases
Latest verified reviews
★★★★★Luis Gallego
23/09/2026
Recibida en menos de 24 horas

Pedí la bateria un lunes a las 7 y me llegó el martes a las 6

★★★★★Sergio IbaÑez
09/06/2026
Rapidez en la entrega

Pedí la batería un lunes a las 6 y me llegó el martes a las 8

★★★★★Eduardo Alvarez
04/02/2026
Gran atención

Esta web es genial. Y los profesionales que están del otro lado te ayudan y asesoran en lo que necesites.

★★★★★Guillermo Diaz
15/01/2026
Buen servicio

Gracias por tan buen servicio, necesitamos mas gente que te atienda asi de bien

★★★★★Pedro Cortes
25/12/2025
Recomiendo esta web

Buena experiencia comprando en esta web. Mi DEKA 8G27 me llego al día siguiente de pedirla. Todo ok

Recommended accessories — complement the Deka 8G27 with a charger or tester

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.

⏱ 10-15 min🛠 Tools: Screwdriver or small wrench (3-5 mm typical) · Protective gloves
  1. 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.

  2. 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.

  3. Step 3. Disconnect the negative (−) first

    With insulated gloves, remove the negative (−) cable first. Some UPS have protection fuses — note their position before removing.

  4. 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.

  5. 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.

  6. 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.

  7. 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.

  8. 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 the 8G27 model a gel battery? Where is it used?

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 8G27 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.

How long does the Deka 8G27 battery last?

Expected lifespan of the Deka 8G27 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 size is this battery?

Dimensions (length × width × height) are 326×167×241 mm — also written as 326x167x241 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.

Which batteries are equivalent to the Deka 8G27?

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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