Q-battery 12LS-33 · Stationary UPS battery 35Ah AGM
Specifications
| Brand | Q-battery |
|---|---|
| Part number | 12LS-33 |
| Voltage (V) | 12 |
| Capacity (C20) | 35Ah (c20) |
| Technology | AGM |
| Length | 195.00 cm |
| Width | 130.00 cm |
| Height | 159.00 cm |
| Weight | 10.60 Kgs |
Q-battery 12LS-33 12V 35Ah 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 Q-battery 12LS-33 is one of our batteries for ups / ups, belongs to our Q-battery batteries and by capacity it sits among our 35Ah batteries.

Stationary battery Q-Battery 12LS-33 35Ah 12V
The Q-Battery 12LS-33 with AGM technology is a 35 Ah, 12 V backup battery for UPS, alarms, telecoms and emergency lighting. It measures 195 × 130 × 159 mm, the format sought by anyone replacing a 35 Ah battery in UPS, alarm and emergency systems.
- Long float life under permanent charge.
- AGM technology: absorbed electrolyte, no spills, can be mounted at an angle.
- Maintenance-free for its whole service life.
- Sealed and gas-free: suitable for cabinets and offices.
Size, terminals and hold-down of the Q-Battery 12LS-33
It has external dimensions of 195 × 130 × 159 mm and weighs 10.60 kg. It uses F11 (M6) 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 Q-Battery 12LS-33 is for
Designed for UPS, alarms, telecoms and emergency lighting, the Q-Battery 12LS-33 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 10.60 kg and F11 (M6) terminals.
Technology inside the Q-Battery 12LS-33
Q-Battery builds the 12LS-33 to the same standards as the rest of its catalogue; what changes between references is capacity, format and terminal position.
AGM (Absorbent Glass Mat) technology seals the electrolyte in glass microfibre. The result is a maintenance-free battery that is highly vibration-resistant and able to withstand deep discharges that would ruin a classic lead-acid battery.
Why choose Q-Battery batteries
Q-Battery specialises in AGM and GEL VRLA batteries for UPS, telecoms, solar and deep cycling, with long-life and tubular-plate series for industrial use. All the Q-Battery batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty.
Manufacturer's warranty
The Q-Battery 12LS-33 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
Replace all the batteries in the set at once and avoid environments continuously above 25 °C. Check the float voltage of the UPS or charger: a voltage that is too high shortens the life of a sealed battery.
Shipping, delivery 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.
Other 35Ah batteries
We stock 20 models of 35 Ah to compare by price, technology and cold cranking: see all 35Ah batteries.
Recommended accessories
Frequently asked questions
Is the Q-battery 12LS-33 an AGM battery and what are the benefits of AGM?
Yes. The 12LS-33 from Q-battery 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.
What are the dimensions of the Q-battery 12LS-33 battery?
Dimensions (length × width × height) are 195×130×159 mm — also written as 195x130x159 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.
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