Sinus 36V 13000mAh Pedelecs Compatible Battery Li-ion

Sinus Pedelecs — 36V Li-ion Replacement Battery

This is a 36V 13000mAh (468Wh) lithium-ion battery for Sinus pedelec electric bicycles. It fits the motor drive system that powers both pedal-assist and throttle modes. Swap it when the original pack no longer delivers the range or power your riding needs.

• Pedelec motor system fit: Sinus pedelecs use a 36V architecture across the motor controller, battery management system, and display. This pack matches that voltage rail and connector format, so the BMS handshake completes and the controller reads state-of-charge correctly.
• Bench tested on actual hardware: We ran this pack through charge cycles and simulated motor-draw loads. The BMS held cutoff thresholds at both the low-voltage floor and the peak-current ceiling, with no spurious trips under sustained draw.
• Post-storage charge protocol: After winter storage, charge the battery slowly on arrival — cold Li-ion cells carry higher internal resistance, and pushing fast charge current below 10°C causes lithium plating on the anode that permanently reduces cycle life. Let the pack warm to room temperature first, then connect the charger.

E-bike motor cutting out mid-hill on a new battery

Climbing a steep gradient pulls sustained high current from the pack — often 15A or more on a 36V system. If the BMS detects that current exceeding its overcurrent threshold, it trips and cuts motor output instantly. This is a protection response, not a fault with the cell capacity. The fix is to reduce assist level on steep sections, which lowers peak draw and keeps the BMS within its operating window.

Charger not accepting the pack after extended storage

When a Li-ion pack sits unused for months, cells can self-discharge below the voltage floor that most chargers recognise as a valid battery — typically around 25V on a 36V nominal pack. The charger sees a voltage too low to safely initiate a charge cycle and refuses to start. Connect the charger and leave it for 30 minutes — many chargers will trickle current to bring the pack back up to acceptance voltage before switching to normal charge. If the LED stays red or unlit past 30 minutes, check that the pack is reading at least 28V at the terminals with a multimeter.