Peaktech 1360 Replacement Battery 3.7V 20400mAh Li-ion

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

This is a 3.7V, 20400mAh (75.48Wh) Li-ion replacement battery for the Peaktech 1360 oscilloscope and related P 1340 / P 1341 field measurement instruments. It uses the OEM part number XDS and fits the Oszilloskop 1360 platform. If the original pack no longer holds a charge or fails to register in the battery menu, this unit replaces it directly.

• 1360 / P 1340 series compatibility: These models share the same battery bay dimensions, 3.7V nominal rail, and BMS handshake protocol. The XDS part number covers all variants in the family, so one SKU covers field units, bench units, and the P 1341 without modification.
• Bench tested on actual hardware: We ran this pack through instrument power-on, probe initialisation, and a sustained logging session. The BMS held through the current spike at probe power-up and did not trip during back-to-back measurement cycles.
• First-use calibration on the 1360 platform: After installing this pack, run a full calibration cycle through the instrument menu before field deployment. The 1360 maps battery state during calibration — skipping this causes premature low-battery warnings on the first measurement session even when the pack is fully charged.

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

Li-ion cells self-discharge during storage. If the pack drops below roughly 2.5V per cell, the BMS enters a protection state and blocks charge input entirely — the instrument shows nothing when plugged in. This is not a dead battery; it is a safety latch. Use a lab charger or a charger with a recovery or "wake" mode to push a trickle current into the pack until cell voltage climbs back above 3.0V. Once the BMS releases, switch to the standard charge rate.

Readings resetting or dropping mid-logging session on the 1360

A sustained sensor load draws continuous current, and if the cell voltage sags below the instrument's low-voltage cutoff threshold, the 1360 resets the active session to protect stored data. This is not random firmware behaviour — it is a voltage dropout event under load. A degraded original pack may show 40–50% on the indicator before the reset hits because the percentage is mapped to open-circuit voltage, not loaded voltage. Replace the pack and confirm loaded voltage stays above 3.5V during a test logging run before field deployment.