Genuine PANASONIC BR-2/3AGCT4A 6V Battery BR-2/3AGCT4A BR2/3AGCT4A

BR-2/3AGCT4A | Panasonic BR Series 4-Cell Lithium Battery — 6V / 2900mAh / FANUC Alpha iSV / Beta iSV / A98L-0031-0025

BR-2/3AGCT4A — Four-Cell Pack for FANUC Alpha and Beta iSV Systems

The BR-2/3AGCT4A is a 4-cell Panasonic BR-series lithium battery pack for FANUC Alpha iSV and Beta iSV integrated servo systems, and Series 18-T CNC and robot controllers. The pack's 2900mAh capacity — delivered at 6V from four BR-2/3AG cells — provides the higher energy reserve demanded by the FANUC iSV amplifier families compared to the simpler 2-cell packs used in earlier Beta and Alpha servo generations.

Each BR-2/3AG cell provides 3V individually. The four cells in the BR-2/3AGCT4A are configured to deliver 6V output — maintaining the encoder and parameter memory in all compatible FANUC amplifier variants through power-off periods.

Key Specifications

Choosing Between BR-2/3AGCT4A and BR-CCF2TH

Two FANUC Alpha-family 6V battery packs with different capacity classes:

Both operate at 6V with the same brown JAE connector family. Select based on the installed amplifier's specified part number — the battery compartment label or maintenance manual confirms which pack applies.

Application Scenarios

Alpha iSV battery alarm: A FANUC CNC with Alpha iSV servo drives displays a battery alarm on one axis. The BR-2/3AGCT4A is identified from the maintenance manual's battery reference (A98L-0031-0025). Replacement during planned downtime retains servo parameters — axis recommissioning avoided.

Series 18-T CNC proactive replacement: A turning centre's 18-T CNC battery replacement cycle calls for the BR-2/3AGCT4A on a 3-year schedule — proactive replacement before the alarm protects programme and tool data from unplanned loss.

FAQ

Q1: What FANUC alarm indicates BR-2/3AGCT4A needs replacement?

The CNC or amplifier generates an alarm code — typically AL-9F (battery warning, advance notice) followed by AL-92 (battery voltage low, replacement urgent) in Mitsubishi/FANUC servo notation, or equivalent CNC-specific battery alarm. Replace at AL-9F, not AL-92 — AL-92 indicates the battery is near complete depletion.

Q2: Can BR-2/3AGCT4A be replaced while the FANUC system is powered on?

Yes — replace with system power on. The amplifier supply maintains memory while powered. Connect the new pack before removing the old one where possible. Replacement with power off requires fast connection to avoid memory loss.

Q3: What is the cross-reference between BR-2/3AGCT4A and A98L-0031-0025?

Both identify the same battery — A98L-0031-0025 is FANUC's internal specification code used in technical documentation and FANUC parts manuals; BR-2/3AGCT4A is the Panasonic cell/pack designation. A06B-6114-K504 is the FANUC service spare ordering number for the same pack.

Q4: How does BR-2/3AGCT4A differ from the smaller BR-AGCF2W used in other FANUC systems?

BR-AGCF2W uses 2 × A-size cells for 6V at approximately 1800mAh — for FANUC Beta amplifier (Beta SVU, Beta iSV in older form). BR-2/3AGCT4A uses 4 × 2/3A-size cells for 6V at 2900mAh — for Alpha iSV, Beta iSV (newer form), and 18-T CNC. The two packs are not interchangeable — confirm from the amplifier's battery port label which variant is required.