Macna Li-Polymer 11.1V Heated Jacket Compatible Battery K-BAT-Li-12VOLT-6.0A

Macna Li-po 12v 6a — 11.1V Li-Polymer Replacement Battery (K-BAT-Li-12VOLT-6.0A)

This 11.1V, 6000mAh Li-Polymer battery replaces the original Macna K-BAT-Li-12VOLT-6.0A pack. It fits Macna heated jackets, vests, and gloves that run on the Li-po 12v 6a platform. Capacity is 66.6Wh — matched to the original specification.

• Li-po 12v 6a platform compatibility: Macna heated garments in this range share a common 11.1V three-cell architecture and a matching connector and BMS handshake. Swapping this battery into any Li-po 12v 6a compatible garment requires no adapters or wiring changes.
• Bench tested on actual hardware: We ran this pack through the full three-heat-setting cycle on compatible Macna heated clothing. The BMS held stable across all settings, with no spurious cutoff events during sustained draws at the highest setting.
• First cold-weather ride tip: Start on the lowest heat setting for the first 10 minutes with a new battery. Heating elements at maximum draw significant current immediately, and the cells benefit from a short warm-up period before full-power operation in sub-zero conditions.

Heating element cutting out mid-ride on maximum setting

The Macna heated garment BMS triggers a protective cutoff when sustained current draw at maximum heat pushes cell voltage below the BMS floor — typically around 9V for a three-cell Li-Polymer pack. This is more likely on a cold day because low ambient temperature accelerates voltage sag under load. The cutoff is not a fault — it is the BMS protecting the cells from damage. Drop to the mid or low setting for two to three minutes to let cell voltage recover, then return to maximum if needed.

Battery draining noticeably faster on high heat than expected

The highest heat setting on Macna heated garments draws three to four times more current than the lowest setting — this is normal and not a battery defect. A 6000mAh pack will deplete proportionally faster when the heating elements are running at full power continuously. If heat time feels shorter than expected, check that the garment connectors are seated fully — a loose connection creates resistance that makes the BMS read a lower state of charge than actual. Reseat both ends of the battery connector and retest at the mid setting before assuming cell degradation.