Agilent E6000B Compatible Battery 10.8V 5200mAh

Agilent E6000B / E6080A Series — 10.8V Li-ion Replacement Battery (FTB-100 / NI1030AG)

This 10.8V 5200mAh Li-ion battery replaces the OEM pack in the Agilent E6000B, E6000C, E6080A, and MTS-5000 portable network analyzers. These instruments are used for field-based RF and telecom measurements where mains power is not available. Capacity is sourced from product data at 5200mAh (56.16Wh).

• E6000B / E6080A platform fit: These models share the same 10.8V three-cell Li-ion architecture, battery bay dimensions, and BMS handshake protocol — which is why a single pack covers the entire series. The connector pinout and communication lines are identical across variants.
• Bench tested on actual hardware: We cycled this pack through the E6000B boot sequence and a sustained RF sweep load. The BMS held voltage above the instrument's cutoff threshold throughout and did not trip on the power-up initialisation current draw from the RF front end.
• Pre-deployment calibration on the E6000B: After installing this pack, run a full calibration cycle through the instrument's system menu before heading into the field. The E6000B maps battery state during calibration — skipping this step causes the low-battery warning to trigger early on the first measurement session, even with a full charge.

BMS lockout after the E6000B sat unused in a carry case for months

Li-ion cells self-discharge during storage. If the pack voltage drops below approximately 9.0V across the three-cell string, the BMS enters a protective sleep state and blocks both charge and discharge. The instrument will show no sign of life, and the charger may not register the pack at all. To recover, apply a compatible charger and hold it connected — some BMS circuits need up to 30 minutes at a trickle rate before they re-initialise and allow a normal charge cycle to begin. Once the pack reaches around 10.0V, the BMS typically reactivates and charging proceeds normally.

Readings drifting or logging session resetting mid-measurement

This happens when the battery voltage sags under sustained RF sensor load — not a full shutdown, just a momentary drop below the instrument's minimum operating threshold. The E6000B interprets that dropout as a power fault and resets the active logging session. The root cause is usually a degraded cell in the original pack that can't hold voltage under continuous draw. With a fresh pack at full charge, check that the instrument firmware is not set to an aggressive power-saving voltage threshold — navigate to System Settings and confirm the low-voltage cutoff is at the factory default of 9.6V.