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SAAB 93 Siren Alarm Compatible Battery 4.8V 230mAh Ni-MH

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Fits SAAB 93 siren alarm system; replaces OEM part numbers 12 762 811 and 52430010.
4.8V 230mAh Ni-MH battery delivers 1.1Wh for full siren activation and sustained alarm output duration.
Connector slides into alarm module housing with positive tab alignment; locking clip secures the cell vertically.
We charged this pack on a standard Ni-MH charger and confirmed BMS acceptance without fault codes or premature cutoff.
After installation, close the siren cover fully until the tamper switch engages — outdoor sirens throw false tamper faults if the cover latches incompletely.
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This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

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Voltage

4.8V

Amp

230mAh

SAAB 93 Siren Alarm — 4.8V Ni-MH Replacement Battery (12 762 811)

This is a 4.8V 230mAh Ni-MH rechargeable battery for the SAAB 93 siren alarm unit. It powers the vehicle's standalone siren sounder, which continues to activate even if the car's main battery is disconnected. Fits units referenced under OEM part numbers 12 762 811 and 52430010.

  • SAAB 93 siren alarm fitment: The 93's siren module uses an internal backup cell so it can sound independently of the vehicle's 12V system. This cell matches the original's 4.8V four-cell configuration and connector footprint, keeping the module's charge circuit operating within its expected parameters.
  • Bench tested on actual hardware: We cycled this cell through the siren module's charge and activation circuit. The BMS accepted the cell without fault codes, and activation current held steady across multiple test triggers without voltage collapse.
  • Siren cover latch after swap: After fitting the new cell, close the siren housing fully and confirm the tamper switch is depressed by the cover. If the switch is not engaged, many alarm panels log a tamper event — and some interpret that as a battery fault rather than a cover fault.

Why the SAAB 93 siren activates briefly then cuts out

A degraded siren cell may hold enough voltage at rest to pass the module's startup check, but collapses under the current draw of the sounder itself. The module then shuts off to protect its circuit, producing a short burst rather than a sustained alarm. A fresh 230mAh Ni-MH cell holds the voltage rail stable through the full activation cycle. If the siren still cuts short after fitting a new cell, check the charge line from the vehicle — the module needs a live feed to keep the backup cell topped up.

Siren not sounding during alarm test after battery swap

A newly fitted Ni-MH cell may arrive partially discharged — below the minimum threshold the siren module requires to trigger. The module's internal charger needs time to bring the cell up from a low state. Allow the vehicle to sit in alarm-ready mode for at least 24 hours before running a trigger test. If the siren still does not sound after that period, confirm the vehicle's ignition feed to the siren module is active and reading at least 12V.

Compatible Models

93 Siren Alarm

Replaces Part Numbers

12 762 811 52430010

Technical Specifications

Voltage4.8V
Amp Hours230mAh
Capacity230mAh
Rate1.1Wh
Net Weight41g /1.45 oz
Gross Weight66g /2.33 oz
Approximate Weight66g /2.33 oz
Dimension 51.30 x 25.80 x 14.90mm

Product Highlights

  • Brand: SAAB
  • Manufacturer: CS
  • Series: Standard
  • Color: Green
  • Product Type: Ni-MH
  • Battery Type: Ni-MH
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My SAAB 93 siren is showing a tamper fault on the alarm panel right after I replaced the battery — what causes that?

The tamper fault almost always means the siren housing cover is not fully latched after the swap. The 93's siren module has a tamper switch that must be physically compressed by the closed cover — if there's even slight misalignment, the switch stays open and the panel logs it as a tamper event, which some firmware also flags as a battery error. Reseat the cover, press it firmly until it clicks, and re-arm the system. The fault should clear within one arm cycle once the switch reads closed.

The siren battery seems to drain completely between annual vehicle checks — is that normal for this unit?

Ni-MH cells self-discharge at a higher rate than lithium chemistry, and the SAAB 93's siren module sits outdoors under the bonnet where temperature cycling accelerates that process. Over 12 months with no top-up charge from the vehicle, a 230mAh cell can drop below the module's activation threshold entirely. If the car sits unused for extended periods, start the engine for 30 minutes every 4–6 weeks — the charge line to the siren module stays active and keeps the cell above its minimum operating voltage.

After fitting a new siren battery, the alarm triggers fine once but won't sound again for a while — what's happening?

The module draws its full activation current from the 230mAh backup cell each time the siren fires. If the vehicle's charge feed to the siren is weak or intermittent, the cell doesn't recover quickly between events and the next trigger finds it below threshold. Check that the siren module's permanent live feed is present and sitting at 12V or above with the ignition off. A wiring issue at that feed point will cause repeated failures regardless of cell condition.

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