Peaktech 1360 Digital Multimeter Replacement Battery 3.7V 13200mAh

Peaktech 1360 / P 1340 Series — 3.7V Li-ion Replacement Battery (XDS)

This 3.7V, 13200mAh Li-ion battery replaces the original pack in the Peaktech 1360, Oszilloskop 1360, P 1340, and P 1341 handheld test and measurement instruments. It restores full portable operation for electrical diagnostics and field testing sessions. Voltage and capacity match the original specification so the onboard battery management system accepts the pack without modification.

• 1360 and P 1340 series compatibility: These models share a common 3.7V cell architecture and the same physical footprint — 118.40 × 96.60 × 25.60mm. The BMS in each instrument uses the same voltage thresholds for charge termination and low-battery cutoff, so one pack covers the full range.
• Bench tested on actual hardware: We cycled this pack through probe initialisation events, which pull a brief current spike each time a sensor module powers up. The BMS held stable through repeated initialisation sequences without tripping into protection mode.
• Post-install calibration cycle: After fitting this pack, run a full calibration sequence through the instrument menu before taking it to site. The instrument maps battery state during calibration — skipping this step causes premature low-battery warnings during the first measurement session, even with a fully charged pack.

BMS lockout after the Peaktech 1360 sat unused in a carry case for months

Li-ion cells self-discharge slowly during storage. If the pack drops below approximately 2.5V per cell, the BMS trips into deep-discharge protection and blocks both charging and power output. The instrument will appear completely dead — no display, no response to the power button. Connecting the charger for 15–30 minutes at a low trickle rate is usually enough to bring the cell voltage back above the BMS recovery threshold. Once the indicator light changes state, proceed with a normal full charge before use.

Readings drifting or resetting mid-session during a continuous logging run

Sustained sensor load draws more current than single-point measurements, and voltage sag under that load can dip briefly below the instrument's operating floor. When that happens, the processor resets to protect the measurement circuit, and any unsaved log data is lost. This is not a faulty pack — it is a cell under stress from a degraded state of charge. Top the battery to 100% before any extended logging session, and verify pack voltage sits above 3.6V at the instrument terminals before starting the run.