Batteryminder Airframe Interface Kit BM-AIK2 New, still in original package, $50 includes shipping The BM-AIK2A is a parts kit to adapt aviation-specific BatteryMINDers for use with FAA-certified aircraft. Compatible with original, and new CEC1 series BatteryMINDer chargers. It may be installed by any certified mechanic (see this video tutorial). It does not require a Form 337 or FSDO field approval; all that is required is an entry in the maintenance logbook for return to service. IMPORTANT:This harness is designed only for maintenance battery charging, not for supplying ground power for airframe operations. Disconnect the charger before turning on airframe electrical power. Reconnect the charger after turning airframe electrical power off to recharge and then maintain/disulfate the battery.