Ritar RT1245S · Stationary UPS battery 4.5Ah AGM
Specifications
| Brand | RITAR |
|---|---|
| Part number | RT1245S |
| Voltage (V) | 12 |
| Capacity (C20) | 4 5Ah (c20) |
| Technology | AGM |
| Length | 195.00 mm |
| Width | 47.00 mm |
| Height | 76.00 mm |
| Terminal type | F1/F2 |
Ritar RT1245S 12V 4Ah 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
Where it fits: the Ritar RT1245S is one of our batteries for ups / ups, belongs to our Ritar batteries and by capacity it sits among our 4Ah batteries.

Stationary battery Ritar RT1245S RT 4Ah 12V
The Ritar RT1245S with AGM technology is a 4 Ah, 12 V backup battery for UPS, alarms, telecoms and emergency lighting. Measuring 195 × 47 × 76 mm, it is the direct replacement for UPS, alarm and emergency systems fitted from the factory with a 4 Ah battery of this format.
- AGM: faster recharging and better cycle resistance than a conventional battery.
- Instant response to mains failures.
- Low self-discharge and high reliability.
- Standard format for UPS and emergency systems.
What the Ritar RT1245S is for
The Ritar RT1245S is designed for UPS, alarms, telecoms and emergency lighting: it sits on float charge and responds instantly to a mains failure. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 1.50 kg and F1/F2 terminals.
Will it fit your current battery tray?
It has external dimensions of 195 × 47 × 76 mm and weighs 1.50 kg. It uses F1/F2 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 Ritar does differently
With more than twenty years making sealed lead batteries, Ritar offers general-purpose, long-life, high-rate and front-terminal ranges for every stationary application. At baterias.com we work directly with the manufacturer or its official distributor: real stock, brand-new product and official warranty.
The Ritar RT1245S: RT range and AGM technology
The RT1245S is part of the Ritar RT range. Choosing the right reference within the series comes down to capacity, dimensions and terminals: technology and quality are common to the whole family.
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.
Care and maintenance
Check the float voltage of the UPS or charger: a voltage that is too high shortens the life of a sealed battery. Replace all the batteries in the set at once and avoid environments continuously above 25 °C.
Manufacturer's warranty
The Ritar RT1245S 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
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.
Other 4Ah batteries: We stock 21 models of 4 Ah to compare by price, technology and cold cranking: see all 4Ah batteries.
Recommended accessories
Frequently asked questions
Is this battery AGM? What is it for?
Yes. The Ritar RT1245S is AGM (Absorbent Glass Mat): sealed lead-acid, with the electrolyte absorbed in glass fibre. Its advantages: more charge/discharge cycles than a conventional battery and better heat tolerance.
What are the dimensions of the Ritar RT1245S battery?
Before buying, measure the space in your device: one extra millimetre can stop the hold-down clamp from closing. The Ritar RT1245S takes up 195×47×76 mm (length, width and height, terminals included).
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