About this replacement
Promax Neo 2 / Neo 3 / Neo 4 — 7.4V Li-ion Replacement Battery (CB-084)
This is a 7.4V, 13000mAh (96.2Wh) lithium-ion battery for the Promax Neo 2, Neo 3, Neo 4, and Neo 2 ATSC series of professional field instruments. These are signal analysis and surveying platforms used in broadcast, cable, and infrastructure assessment. This replacement uses OEM part number CB-084.
- Neo 2 / Neo 3 / Neo 4 compatibility: These models share the same 7.4V battery bay, connector pinout, and BMS communication protocol — a single pack covers all four variants without modification.
- Bench tested on actual hardware: We ran this pack through probe module initialisation and sustained RF signal acquisition loads. The BMS held voltage rail stability and did not trip under the current spike at sensor power-up.
- First-deployment calibration step: After installing, run a full calibration cycle through the instrument menu before heading to site. The Neo series maps battery state during calibration — skip this and the instrument will flag premature low-battery warnings on your first measurement session.
BMS cutoff when the probe module initialises on first power-up
When the Neo 2 or Neo 3 powers on and the probe module initialises, there is a brief current spike as the internal RF front-end draws load simultaneously. A new pack with a conservative BMS threshold can interpret this spike as a fault and cut output. This is not a defective battery — it is a protection circuit responding to inrush current. If this occurs, power the instrument off, wait 10 seconds, and restart; after one or two cycles the BMS learns the load profile and stops tripping.
Pack will not charge after the instrument sat unused for several months
Extended storage below approximately 2.5V per cell pushes the BMS into deep-sleep lockout — the charger sees no handshake and refuses to deliver current. Connect the pack to the Neo's original charger and leave it for 30–45 minutes without interrupting the connection; most chargers on this platform apply a low-current recovery pulse before switching to full charge. If the charge LED does not activate after 45 minutes, the cells have dropped below recoverable voltage and the pack should be replaced.