Sonnenschein GF12025YG · Deep-cycle battery 12V 28Ah GEL
Specifications
| Brand | Sonnenschein |
|---|---|
| Part number | GF12025YG |
| Voltage (V) | 12V |
| Capacity (C20) | 28Ah (c20) |
| Capacity | 28Ah |
| Technology | GEL |
| Weight | 10,00 |
| Terminal type | F4 |
| EAN | 3661024500074 |
€206.70
VAT included
Sonnenschein GF12025YG 12V 28Ah is a deep-cycle battery built to be discharged and recharged daily without losing capacity. Its reinforced grid and AGM/GEL separator extend the number of useful cycles well beyond a conventional starter battery.
Why this deep-cycle 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
28 Ah
Dimensions
197×132×184 mm
Technology
Gel
Weight
10 kg
Model
GEL - GF -Y Sonnenschein Cyclic range 450 cycles
Mobility battery Sonnenschein GF12025YG 28Ah 12V
12VVoltage
28AhCapacity
10kgWeight
The 12 V, 28 Ah Sonnenschein GF12025YG with GEL technology is the standard replacement for power wheelchairs, mobility scooters and light electric vehicles. Measuring 197 × 132 × 184 mm, it is the direct replacement for power wheelchairs and mobility scooters fitted from the factory with a 28 Ah battery of this format.
- GEL: excellent resistance to deep discharge and long cycle life.
- Sealed AGM/GEL: safe indoors and in transport.
- No maintenance, no water top-ups.
- Approved for air and sea transport (VRLA).
Size, terminals and hold-down of the Sonnenschein GF12025YG
It has external dimensions of 197 × 132 × 184 mm and weighs 10 kg. It uses F4 terminals, the system that anchors and connects it in the vehicle. 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 the Sonnenschein GF12025YG is for
The Sonnenschein GF12025YG 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 10 kg and F4 terminals.
Technology inside the Sonnenschein GF12025YG
Within the Sonnenschein catalogue, the GF12025YG is the 28 Ah model designed for this application.
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.
Sonnenschein: the maker behind the GF12025YG
Sonnenschein (EnerSys) invented the dryfit® GEL battery: the world reference in gel batteries for electric mobility, light traction and applications that demand safety and intensive cycling. At baterias.com we work directly with the manufacturer or its official distributor: real stock, brand-new product and official warranty.
Official warranty
The Sonnenschein GF12025YG 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.
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. GEL batteries need lower charging voltages: always use a charger with a GEL mode so as not to damage the electrolyte.
When you get it and how to return it
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.
BATERIAS-SONNENSCHEIN-GF12025YG
Data sheet
- Weight
- 10,00
- Technology
- GEL
- Terminal type
- F4
- Capacity (C20)
- 28Ah (c20)
- Voltage (V)
- 12V
- Capacity
- 28Ah
Specific References
- EAN13
- 3661024500074
- MPN
- GF12025YG
Codes and references Sonnenschein GF12025YG
| Brand | Sonnenschein |
|---|---|
| Manufacturer reference (MPN) | GF12025YG |
| EAN-13 barcode | 3661024500074 |
| Dimensions (length × width × height) | 197 × 132 × 184 mm (197x132x184) |
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 the Sonnenschein GF12025YG a GEL battery? What is GEL used for?
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 is the Sonnenschein GF12025YG 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 (−) 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 GF12025YG model?
Expected lifespan of the Sonnenschein GF12025YG 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 Sonnenschein GF12025YG battery?
Dimensions (length × width × height) are 197×132×184 mm — also written as 197x132x184 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 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 — 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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