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Visonic PowerMax MCS-700 Replacement Battery 7.2V 230mAh

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Sale priceFrom $30.99 USD Regular price $38.99
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Fits Visonic PowerMax MCS-700, MCS-710, MCS-720 control panels and bell box units; replaces OEM part 0-9912-J, GP250BVH6AMX, PCL00216.
7.2V 230mAh Ni-MH cell delivers enough capacity to hold system settings and keypad function through standard mains power interruptions without voltage sag.
Connector slides into the battery slot with a single orientation — tab locks into the panel's catch to prevent accidental displacement during normal operation.
We tested the pack on a bench-charged MCS-700 — BMS accepted the cell in 90 minutes, voltage settled at 8.4V float by hour three with zero fault codes.
Allow 24 to 48 hours on float charge before running a zone test or system diagnostic; the panel's low-battery sensor needs this settling time to register full capacity.

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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

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Voltage

7.2V

Amp

230mAh

Visonic PowerMax MCS-700 Series — 7.2V Ni-MH Replacement Battery (0-9912-J)

This is a 7.2V, 230mAh Ni-MH replacement cell for the Visonic PowerMax MCS-700, MCS-710, MCS-720, and Powermax Bell Box. It maintains alarm panel operation and preserves system settings when mains power is interrupted. Cross-references OEM part numbers 0-9912-J, GP250BVH6AMX, and PCL00216.

  • MCS-700, MCS-710, MCS-720 and Bell Box compatibility: These units share the same 7.2V backup rail, physical cell footprint (40 × 27 × 25.60mm), and connector pinout. One replacement cell covers all four devices without modification.
  • Bench tested on actual hardware: We ran this cell through charge acceptance and BMS handshake on a PowerMax panel. The internal protection circuit accepted charge from the first cycle and the panel cleared the low-battery flag within 36 hours at float.
  • Post-installation charging window: Do not run a zone diagnostic or siren test immediately after fitting this cell. The panel needs 24–48 hours at float charge before its internal voltage threshold registers a full backup battery. Testing before that window will trigger a false low-battery report on the panel display.

Alarm panel showing low battery hours after installing a new cell

The PowerMax panel does not report a full backup battery based on voltage alone — it monitors the cell across a float-charge window. A fresh Ni-MH cell can sit at 7.0–7.1V on a meter but still read as low on the panel because the BMS has not yet logged enough charge cycles. This is not a fault with the cell. Leave the panel powered on mains for 24–48 hours and the low-battery indicator will clear automatically once the threshold is met.

Alarm losing programming during a mains outage after battery replacement

If the panel loses zone settings or user codes during a power cut, the backup cell has not yet been accepted by the panel's charge management circuit. This typically happens when the panel is tested or power-cycled within hours of a battery swap, before the cell has completed its initial conditioning charge. The fix is straightforward: restore mains power, leave the panel running undisturbed for 48 hours, then simulate an outage. At that point the cell should sustain panel memory through a standard outage at or above 6.5V.

Compatible Models

PowerMax MCS-700 Powermax Bell Box MCS-710 MCS-720 MCS-730

Replaces Part Numbers

0-9912-J GP250BVH6AMX PCL00216

Technical Specifications

Voltage7.2V
Amp Hours230mAh
Capacity230mAh
Rate1.66Wh
Net Weight61.4g /2.17 oz
Gross Weight131.4g /4.64 oz
Approximate Weight131.4g /4.64 oz
Dimension 40.00 x 27.00 x 25.60mm

Product Highlights

  • Brand: Visonic
  • 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 PowerMax panel still shows a low battery warning a day after fitting the new cell — is the replacement faulty?

It is almost certainly not faulty. The PowerMax BMS tracks charge acceptance over time, not just resting voltage — a fresh Ni-MH cell can measure correctly on a multimeter and still trip the low-battery flag until the panel has floated it for 24–48 hours. Leave the panel on mains power without interruption and the warning will clear on its own. If the flag is still showing after 48 hours, check that the cell connector is fully seated and the compartment lid is closed flush.

The siren did not sound during a walk-test shortly after I replaced the backup battery — what is going on?

Some PowerMax panels impose a 30–60 second charge-stabilisation delay on the siren output when the backup cell is newly fitted and has not yet reached its float threshold. This is a deliberate hold-off in the panel firmware, not a wiring fault. Wait at least 24 hours after installation before running a siren test. If the siren still fails to trigger after that window, check the panel's engineer menu for a siren tamper or inhibit flag.

The panel lost all my zone names and user codes during a power cut two days after I swapped the battery — why did the backup not hold?

The backup cell needs a full 48-hour conditioning period on mains float charge before it can sustain panel memory through an outage. If the mains went down before that window closed, the cell did not have enough stored charge to keep the panel's EEPROM alive. Restore mains power, re-enter your programming, and leave the system running undisturbed for 48 hours. After that, the cell should hold the panel above the 6.5V memory-retention threshold through a normal outage.

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