NetScout OneTouch AT Replacement Battery 7.4V 5200mAh

NetScout OneTouch AT Network Assistant — 7.4V Li-ion Replacement Battery

This 7.4V 5200mAh Li-ion battery fits the NetScout OneTouch AT Network Assistant, a field-grade portable tool used for copper and fiber network diagnostics. It replaces the original pack and restores full operating power to the platform. Capacity is 38.48Wh — drawn from the product specification, not estimated.

• OneTouch AT platform compatibility: The OneTouch AT family shares a common battery bay geometry, voltage rail, and BMS communication protocol. A single 7.4V pack services both the base unit and AT-configured variants without modification to connectors or firmware handshake.
• Bench tested on actual hardware: We cycled this pack through startup, active copper line testing, and fiber port initialisation. The BMS handled the inrush current at probe power-up without tripping, and cell voltage held within tolerance across a sustained load sequence.
• Post-installation calibration step: After fitting this battery, run a full calibration cycle through the OneTouch AT instrument menu before field deployment. The unit maps battery state during that cycle — skipping it causes the low-battery indicator to trigger early on the first measurement session, which is a firmware behaviour, not a cell defect.

BMS lockout after the OneTouch AT sat unused in a carry case for months

Li-ion cells self-discharge during storage. If the OneTouch AT was left unused long enough, the pack voltage can drop below the BMS protection threshold — typically around 2.5V per cell for a 7.4V nominal pack. At that point the BMS opens the output circuit and the unit will not power on at all, even when connected to a charger. This is a protection state, not a dead battery. Applying a compatible charger for 30–60 minutes often recovers enough voltage for the BMS to re-enable the output circuit and resume normal charging.

Readings resetting or dropping out mid-logging session

During sustained sensor load — particularly when the OneTouch AT is running continuous copper or fiber analysis — total draw increases beyond standby levels. If the cell voltage sags under that load, the unit can reset or drop a live reading without showing a low-battery warning first. This happens when cells have degraded below their rated capacity and can no longer sustain voltage under load, even if the display showed an acceptable charge level at rest. Fitting a fresh pack with full 5200mAh capacity restores the sustained-draw headroom the platform needs. After fitting, run the calibration cycle so the instrument recalibrates its voltage-to-percentage mapping to the new cells.