PoulanPro PR140Li 58V Cordless Mower Compatible Battery 5000mAh

PoulanPro PR275Ci / PR280Li Series — 58V Li-ion Replacement Battery (PR140Li)

This is a 58V lithium-ion replacement battery rated at 5000mAh (290Wh), built to fit the PoulanPro PR275Ci, PR280Li, HT24i, SN280Li, and related models. It slots into the same battery bay and communicates with the mower's onboard BMS using the same handshake protocol as the original pack. When your original battery no longer holds charge or cuts out under load, this is the direct swap.

• PR275Ci and PR280Li platform fit: These models share a common 58V battery rail, connector format, and BMS communication protocol. The same pack works across the lineup because PoulanPro standardised the battery interface across this voltage class — swapping between supported models requires no adapters or configuration changes.
• Bench tested on actual hardware: We ran this pack through full load cycles simulating blade motor inrush under thick-grass conditions. The BMS handled the high-current draw without false tripping, and cell voltage held stable across the discharge curve without unexpected sag at the low end.
• Seasonal storage prep: Before first use of the season, bring the battery indoors overnight if temperatures are below 10°C. Cold Li-ion cells have higher internal resistance, and the blade motor's inrush current can trip the BMS on a cold pack before the mower even starts cutting.

BMS cutoff on thick-grass or wet-grass blade load

The PR275Ci blade motor draws a sharp inrush of current each time it bites into dense or wet grass. If the battery's BMS detects that draw exceeding its threshold — usually caused by a degraded original pack with elevated internal resistance — it cuts power to protect the cells. A new pack with lower internal resistance handles those inrush spikes more cleanly. If cutouts continue with the new battery, the issue is likely a partially blocked deck or a dull blade forcing the motor to work harder.

Charger showing a fault light after the mower sat all winter

Li-ion cells that discharge below roughly 2.5V per cell during long storage fall outside the charger's acceptance window — the charger reads the pack as faulty and refuses to charge. This is common after a full winter in an unheated garage. Some chargers have a recovery or trickle mode; check your charger manual for that sequence. If the original pack won't recover, this replacement battery ships at a partial state of charge that keeps cells above the recovery threshold from day one.