Hantek DSO-1062B Compatible Battery 7.4V 4500mAh

Hantek DSO-1062B / DSO-1202B Series — 7.4V Li-Polymer Replacement Battery (PL727076)

This 7.4V 4500mAh Li-Polymer pack replaces the OEM PL727076 battery in Hantek DSO-1062B, DSO-1202B, and DSO-1202S portable digital storage oscilloscopes. It restores untethered operation for field diagnostics, signal tracing, and electronics troubleshooting away from AC power. Capacity figure is 4500mAh / 33.3Wh as listed in the product specification.

• DSO-1062B / DSO-1202B / DSO-1202S compatibility: These three models share the same 7.4V nominal voltage rail, identical PL727076 form factor (75.00 × 64.20 × 13.00mm), and the same BMS handshake protocol — swapping the pack across any of the three units requires no modification.
• Bench tested on actual hardware: We cycled this pack through the DSO-1062B's charge circuit and monitored BMS cutoff thresholds under live probe load. The protection circuit tripped correctly at under-voltage and over-current limits without false shutdowns during signal acquisition.
• First-use calibration on the DSO-1062B: After installing, run a full calibration cycle through the instrument's system menu before taking it into the field. The oscilloscope maps battery state during calibration — skipping this step causes premature low-battery warnings on the first measurement session.

BMS cutoff when the DSO-1062B probe inputs initialise

At power-on, the DSO-1062B energises its front-end probe circuitry in a short burst that pulls a higher current than steady-state operation. A weakened or deeply discharged pack can't sustain that spike, and the BMS cuts output to protect the cells. The result looks like the unit powers up then immediately shuts off — not a display fault. Charge the replacement pack to at least 8.0V before the first boot to ensure the BMS stays latched through initialisation.

Voltage sag causing readings to drift or reset mid-logging session

During a sustained logging session, the oscilloscope draws steady current across both the display backlight and the acquisition circuitry simultaneously. If cell internal resistance has risen — common in packs that sat unused — voltage sags under that combined load and the instrument resets its timebase or drops data. This is a cell condition issue, not a firmware fault. Charge the new pack fully, then confirm resting voltage reads 8.3–8.4V before starting a long capture run.