Ritar RT628 · Stationary UPS battery 6V 2.8Ah AGM
Specifications
| Brand | RITAR |
|---|---|
| Part number | RT628 |
| Voltage (V) | 6 |
| Capacity (C20) | 2 8Ah (c20) |
| Technology | AGM |
| Length | 66.00 mm |
| Width | 33.00 mm |
| Height | 104.00 mm |
| Terminal type | F1 |
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Ritar RT628 6V 2Ah is a stationary battery for backup power systems: UPS, alarms, telecom and emergency lighting. Long float-life under permanent charge and instant response to mains outages with no noticeable voltage drop.
Why this stationary battery?
- Instant responsewhen the mains drop, no voltage dip
- Long life under 24/7 chargeoptimised for permanent service
- Compatible with your systemexisting UPS units and alarm control panels
Voltage
6 V
Capacity
2 Ah
Dimensions
66×33×104 mm
Technology
AGM
Weight
0,53 kg
Model
RITAR RT
Tenía varias opciones en mente y me ayudaron a elegir la más correcta
Agustin JimenezMRW me entregó en menos de un día. Increíble
Jose Maria JimenezEsta web es la mejor, encontré lo que buscaba, llegó en menos de 24hrs y cuando llamé por una duda que tenía me ayudaron con la instalación
Samuel Morales
Reviews originally written in Spanish
Stationary battery Ritar RT628 RT 2Ah 6V
6VVoltage
2AhCapacity
0.53kgWeight
The 6 V, 2 Ah Ritar RT628 stationary battery from the RT range with AGM technology is designed for UPS, alarms, telecoms and emergency lighting. Its 66 × 33 × 104 mm make it the exact replacement for the 2 Ah battery fitted as standard to many UPS, alarm and emergency systems.
- Instant response to mains failures.
- AGM: faster recharging and better cycle resistance than a conventional battery.
- Standard format for UPS and emergency systems.
- Low self-discharge and high reliability.
Will it fit your current battery tray?
It has external dimensions of 66 × 33 × 104 mm and weighs 0.53 kg. It uses F1 terminals, the system that anchors and connects it in the vehicle. 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 the Ritar RT628 is for
Designed for UPS, alarms, telecoms and emergency lighting, the Ritar RT628 is sealed, gas-free and suitable for technical cabinets and offices. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 0.53 kg and F1 terminals.
The Ritar RT628: RT range and AGM technology
The RT is the Ritar range the RT628 belongs to: it shares the same construction and quality criteria with the rest of the series, and varies in capacity and format to suit each vehicle.
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.
Ritar: the maker behind the RT628
Ritar is one of the world's largest VRLA battery manufacturers. Its RA, RT, RL, HR and FT series equip UPS, telecoms and solar systems worldwide with very consistent quality. We guarantee that every Ritar arrives new, charged and with the manufacturer's full warranty.
Warranty and coverage
The Ritar RT628 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.
How to make it last longer
Charge with a charger that has an AGM mode: it limits the voltage and protects the glass-fibre separators. Replace all the batteries in the set at once and avoid environments continuously above 25 °C.
When you get it and how to return it
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.
BCOM-RITAR-RT628
Data sheet
- Brand
- RITAR
- Reference
- RT628
- Model
- RITAR RT
- Voltage (V)
- 6
- Length
- 66.00 mm
- Width
- 33.00 mm
- Height
- 104.00 mm
- Technology
- AGM
- Terminal type
- F1
- Capacity (C20)
- 2 8Ah (c20)
Specific References
- MPN
- RT628
4,67/5
Latest reviews
Reviews originally written in Spanish
★★★★★Agustin Jimenez
25/06/2026Gracias por su asesoramiento
Tenía varias opciones en mente y me ayudaron a elegir la más correcta
★★★★★Jose Maria Jimenez
07/02/2026Me llegó al día siguiente
MRW me entregó en menos de un día. Increíble
★★★★★Samuel Morales
11/01/2026Gran asesoramiento
Esta web es la mejor, encontré lo que buscaba, llegó en menos de 24hrs y cuando llamé por una duda que tenía me ayudaron con la instalación
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 RT628 model AGM? What does this technology offer?
Yes. The RT628 from Ritar 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 is the Ritar RT628 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.
How many years does this battery last?
Expected lifespan of the Ritar RT628 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 Ritar RT628 battery?
Dimensions (length × width × height) are 66×33×104 mm — also written as 66x33x104 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 RT628 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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