About this replacement
Garden Feelings IAM 36-3730 F — 36V Li-ion Replacement Battery (R1S-360-AH-C)
This is a 36V 2700mAh Li-ion battery for Garden Feelings cordless lawn mowers. It fits the IAM 36-3730 F, IAM 36-4340-1N F, IAM 36-4340-1S F, and GDLM3640 models. Voltage and connector match the original pack exactly.
- IAM 36 series and GDLM3640 compatibility: These mowers share the same 36V battery rail, connector housing, and BMS handshake protocol. One battery covers all four models without adapters or modifications.
- Bench tested on actual hardware: We cycled this pack through full charge and load discharge on a 36V mower platform. The BMS held stable across normal cutting loads and responded correctly to overcurrent conditions without nuisance tripping.
- First use of the season: If the mower has sat in a cold garage over winter, bring the battery indoors overnight before use. Below 10°C, Li-ion internal resistance rises sharply and the blade motor's inrush current can trip the BMS before a single row is cut.
BMS cutoff on thick-grass and wet-grass blade load
Tall or wet grass puts sustained high-draw load on the blade motor. At peak demand, current can spike past the BMS overcurrent threshold, causing the pack to cut out mid-row. This is a protection event, not a battery fault. Let the pack rest for five minutes, then resume on a lower cutting height or a drier section. If cutouts repeat consistently, check that the blade is sharp — a dull blade draws significantly more current for the same grass volume.
Charger showing fault light after winter storage
A pack stored below a full charge over several months can self-discharge below the charger's minimum acceptance voltage. Most 36V chargers refuse to engage a cell group sitting under roughly 30V. The fix is a recovery charge — some chargers have a wake or reconditioning mode; select it and leave the pack connected for at least 30 minutes before checking. If the fault clears, continue with a normal full charge cycle before putting the mower back into service.