Sichler PCR-1350 L Reinigungs-Roboter Compatible Battery 14.4V

Sichler Reinigungs-Roboter PCR-1350 L / PCR-2350 LX — 14.4V Ni-MH 4000mAh Replacement Battery

This is a 14.4V Ni-MH battery rated at 4000mAh (57.6Wh) for the Sichler Reinigungs-Roboter robotic vacuum cleaner range. It fits the PCR-1350 L, PCR-2350 LX, NC-3337, and NC-3338 models. Physical dimensions are 179 x 51 x 52mm — verify clearance before fitting.

• PCR-1350 L / PCR-2350 LX / NC-3337 / NC-3338 platform: These models share the same 14.4V battery rail, connector pinout, and BMS handshake, so one cell format covers the full group. Voltage tolerance across the range sits within the same window — no firmware or wiring changes required between models.
• Bench tested on actual hardware: We ran the cell through a full charge and discharge cycle, monitoring BMS cutoff at both ends. The protection circuit tripped correctly at low-voltage floor and released cleanly on reconnect to the charger — no fault lock requiring manual reset.
• Dock charging habit on robotic vacuums: Do not leave this vacuum on the charging dock permanently. Ni-MH cells in continuous trickle charge develop capacity fade faster than cells charged only when depleted. Charge to full, then remove from the dock until the next cleaning cycle.

Suction dropping before the battery indicator reaches low

Ni-MH cells show a relatively flat discharge curve, so the onboard indicator often stays green while motor voltage is already sagging under load. A partially blocked filter forces the motor to draw above rated current, which accelerates that voltage sag further. The result is noticeably weaker suction while the indicator still reads mid-range. Clean the filter and check brush roll clearance — if suction recovers immediately after a filter clean, the battery was not the root cause.

Replacement battery not charging on the dock after fitting

Some Sichler charger units send a low-current pulse first to confirm cell chemistry before committing to a full charge cycle. A new Ni-MH cell at low resting voltage can be read as a fault by the charger's detection circuit, causing it to stop before charging begins. Remove the battery, hold the robot's power button for five seconds to clear any latched state, then reseat the battery and return the unit to the dock. If the charger indicator then changes to its charging state, the handshake has completed and charging is underway — confirm by checking the cell is warm to the touch after 20 minutes, which indicates active current flow.