Micsig TO1000 Oscilloscope Compatible Battery 7.4V 8200mAh

Micsig TO1000 Series — 7.4V Li-Polymer Replacement Battery (SEC5076170-2S)

This 7.4V, 8200mAh lithium-polymer battery replaces the original pack in the Micsig TO1000, TO1104+, STO1000, and ATO1102 handheld oscilloscopes, along with six additional models in the same family. It matches the OEM voltage rail, connector, and BMS handshake required by this instrument series. Capacity figure is 8200mAh (60.68Wh) — taken directly from the cell specification, not estimated.

• TO1000 family compatibility: Every model in this series runs the same 7.4V dual-cell Li-Polymer architecture with an identical JST-style connector and the same BMS communication protocol. That shared platform is why one pack covers the full lineup — the voltage rail and handshake requirements don't change between models.
• Bench tested on actual hardware: We cycled this pack through cold-start and sustained-acquisition loads on the TO1000 platform. The BMS held cutoff thresholds correctly, accepted charge without a protection-circuit trip, and reported state-of-charge accurately through the instrument's onscreen indicator.
• Post-install calibration before field deployment: After fitting this battery, run a full calibration cycle through the instrument's system menu before taking it out for measurements. The TO1000 maps battery state during calibration — skipping this step causes premature low-battery warnings during your first measurement session in the field.

BMS lockout after the TO1000 sat unused in a carry case for months

Li-Polymer cells self-discharge slowly in storage. If the pack drops below roughly 2.5V per cell (5.0V total), the BMS trips a deep-discharge lockout to protect the cells from damage. At that point the instrument won't power on and won't respond to the charger immediately. Connect the charger and leave it for 20–30 minutes — the BMS needs a trickle signal to exit sleep mode before it allows a full charge cycle to begin.

Oscilloscope shuts down the moment a probe channel initialises

Probe power-up draws a short inrush current as the channel's front-end circuitry comes online. On a degraded or freshly installed pack, this spike can push the instantaneous draw past the BMS overcurrent threshold, triggering an immediate shutdown. The fix is to let the instrument boot fully to the home screen before connecting probes or enabling channels. If shutdowns continue on a new pack, check that the battery connector is fully seated — a loose contact raises effective impedance and amplifies voltage sag at the same current draw.