About this replacement
NetScout AirCheck G2 — 3.7V Li-ion Replacement Battery (ACKG2-WBP)
This is a 3.7V, 5200mAh Li-ion replacement battery for the NetScout AirCheck G2 Wi-Fi network analyser and AirCheck G2 WLAN Tester. It also fits the LinkRunner AT Network Auto-Tester. OEM part numbers ACKG2-WBP and SNBP-LION both cross to this pack.
- AirCheck G2 and LinkRunner AT compatibility: Both instruments share the same 3.7V battery bay, connector pinout, and BMS communication protocol — the same cell pack services the full platform without modification.
- Bench tested on actual hardware: We ran this pack through a full charge and discharge cycle on the AirCheck G2. The BMS reported state-of-charge correctly, and the instrument held stable voltage through the WLAN scanning and site survey load profile without tripping cutoff.
- First-use calibration on the AirCheck G2: After installing this battery, run a full calibration cycle through the instrument's system menu before field deployment. The AirCheck G2 maps battery state during that process — skipping it causes premature low-battery warnings on the first measurement session.
BMS lockout after the AirCheck G2 sat unused in a carry case for months
Li-ion cells self-discharge during storage. If the AirCheck G2 sat unused long enough, the pack voltage can drop below the BMS recovery threshold — typically around 2.5V per cell. At that point the BMS enters a protective sleep state and the instrument will not power on even when connected to a charger. Connecting the unit to a USB-C power source and holding the power button for 10–15 seconds can trigger a BMS wake sequence. If the pack recovers to above 3.0V, normal charging resumes from there.
AirCheck G2 shuts down during USB data transfer to a PC
USB data transfer adds a second simultaneous draw on top of active WLAN scanning — the combined load can pull the voltage low enough to trip the BMS undervoltage cutoff, even with a battery that showed adequate charge beforehand. This is not a faulty cell; it is a threshold event caused by the combined current spike. Charge the battery to full before transferring logs, and avoid running a live site survey during the transfer. A pack resting at 3.6V or above before you plug in the USB cable will clear this cutoff margin.