Q-battery 12LS-0.8 JST · Stationary UPS battery 12V 0.8Ah AGM
Specifications
| Brand | Q-battery |
|---|---|
| Part number | 12LS-0.8 JST |
| Voltage (V) | 12 |
| Capacity (C20) | 0.8Ah (c20) |
| Technology | AGM |
| Length | 96.00 cm |
| Width | 25.00 cm |
| Height | 62.00 cm |
| Weight | 0.50 Kgs |
Q-battery 12LS-0.8 JST 12V 0Ah 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

Stationary battery Q-Battery 12LS-0.8 JST 0.8Ah 12V
The 12 V, 0.8 Ah Q-Battery 12LS-0.8 JST stationary battery with AGM technology is designed for UPS, alarms, telecoms and emergency lighting. Measuring 96 × 25 × 62 mm, it is the direct replacement for UPS, alarm and emergency systems fitted from the factory with a 0.8 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 Q-Battery 12LS-0.8 JST is for
Designed for UPS, alarms, telecoms and emergency lighting, the Q-Battery 12LS-0.8 JST 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 0.50 kg and JST terminals.
Size, terminals and hold-down of the Q-Battery 12LS-0.8 JST
The Q-Battery 12LS-0.8 JST is made in the 96 × 25 × 62 mm format and weighs 0.50 kg. It uses JST 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.
Q-Battery: the maker behind the 12LS-0.8 JST
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.
Technology inside the Q-Battery 12LS-0.8 JST
Q-Battery builds the 12LS-0.8 JST to the same standards as the rest of its catalogue; what changes between references is capacity, format and terminal position.
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.
How to make it last longer
Check the float voltage of the UPS or charger: a voltage that is too high shortens the life of a sealed battery. Charge with a charger that has an AGM mode: it limits the voltage and protects the glass-fibre separators.
Manufacturer's warranty
The Q-Battery 12LS-0.8 JST 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.
Recommended accessories
Frequently asked questions
Is the Q-battery 12LS-0.8 JST an AGM battery and what are the benefits of AGM?
Yes. The 12LS-0.8 JST 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.
How do I fit the 12LS-0.8 JST 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 our blog. 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 12LS-0.8 JST model?
Expected lifespan of the Q-battery 12LS-0.8 JST 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 measurements of the 12LS-0.8 JST model?
Dimensions (length × width × height) are 96×25×62 mm — also written as 96x25x62 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 12LS-0.8 JST 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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