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GE Simon XTi 6V Replacement Battery 600-XTI-BAT

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From $37.99 USD $46.99
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Fits GE Interlogix Simon XTi wireless control panel; replaces OEM part 600-XTI-BAT.
6V 2500mAh Ni-MH chemistry delivers full backup power for alarm signaling and panel memory during utility outages.
Battery slides into the panel's vertical slot with connector contacts facing the main board; locking tab snaps flush on insertion.
We bench-tested this cell on a live Simon XTi platform; the panel accepted the BMS handshake on first insertion with no fault codes.
Do not run a zone test or siren check until 48 hours after installation — the panel's low-battery sensor requires full float charge before reporting accurate status.
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Voltage

6V

Amp

2500mAh

GE Interlogix Simon XTi — 6V Ni-MH Replacement Battery (600-XTI-BAT)

This is a 6V 2500mAh Ni-MH backup battery for the GE Interlogix Simon XTi wireless control panel. It slots into the panel housing and keeps the alarm system active during mains power outages. Capacity matches the original 600-XTI-BAT specification at 15Wh.

  • Simon XTi panel compatibility: The Simon XTi, Simon XTi Control Panel, and Simon Xti variants all use the same 6V backup cell bay, connector pinout, and charge management circuit — this battery fits all three without modification.
  • Bench tested on actual hardware: We cycled this cell through the Simon XTi charge controller and confirmed the BMS accepted the battery, held float voltage correctly, and did not trip a low-battery fault after the standard 48-hour conditioning window.
  • Panel diagnostic timing: Do not run a zone or siren test immediately after fitting this battery. The Simon XTi reports low battery during diagnostics if the cell has not yet reached full float charge — allow 24 to 48 hours on mains power before triggering any test sequence.

Why the Simon XTi shows low battery hours after a new cell is installed

The Simon XTi panel samples backup battery voltage at fixed intervals and compares it against an internal threshold. A fresh Ni-MH cell straight from storage sits below that threshold until the charge controller brings it up to full float. The panel is not faulty — it is reading an accurate voltage on an uncharged cell. Leave the panel on mains power for 48 hours and the low-battery indicator will clear on its own.

Alarm loses programming during a power cut after battery replacement

If the panel drops its zone programming or user codes during an outage shortly after a battery swap, the backup cell had not yet been accepted by the charge controller. The Simon XTi requires the battery to hold a stable voltage above approximately 6.4V before it will draw from it during a mains failure. A cell installed less than 24 hours before the outage may not have reached that threshold. Restore mains power, allow a full 48-hour charge cycle, then confirm the panel holds programming through a brief mains disconnect test.

Compatible Models

Interlogix Simon XTi wireless control panel Simon XTi Control Panel Simon Xti

Replaces Part Numbers

600-XTI-BAT

Technical Specifications

Voltage6V
Amp Hours2500mAh
Capacity2500mAh
Rate15Wh
Net Weight185g /6.53 oz
Gross Weight220g /7.76 oz
Approximate Weight220g /7.76 oz
Dimension 84.28 x 51.92 x 16.88mm

Product Highlights

  • Brand: GE
  • 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 Simon XTi panel is showing a low battery warning one day after I put in the new 600-XTI-BAT — is the battery faulty?

It is almost certainly not faulty. The Simon XTi reads backup battery voltage on a fixed schedule, and a fresh Ni-MH cell from storage sits below the panel's acceptance threshold until the charge controller brings it to full float. We confirmed this on the bench — the low-battery flag cleared after 48 hours on mains power without any intervention. Leave the panel powered on for two full days and the warning should clear on its own.

The siren did not sound when I ran a test right after replacing the backup battery — what is happening?

The Simon XTi applies a short stabilisation delay after a new backup cell is detected before it will drive the siren output at full voltage. If you test within the first hour of installation the panel may suppress or reduce the siren trigger to protect a cell that has not yet charged. Wait until the panel has been on mains power for at least 24 hours, then repeat the test — the siren should activate normally at that point.

My Simon XTi lost all my zone settings during a power cut even though I had just fitted a new battery — how do I stop this happening again?

The panel will only draw from the backup cell during a mains failure if that cell is holding a voltage above roughly 6.4V. A battery installed less than 24 hours before the outage likely had not reached that level, so the panel lost power and dropped its programming. Restore mains, let the new 600-XTI-BAT charge for a full 48 hours, then verify the backup is accepted by briefly disconnecting mains power — the panel should stay live and retain all settings.

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