The IN2904200 is designed to charge 7S cell Li-ion battery pack for electric skateboard. This charger is easy and safe to use. It features pre-charging, bad/wrong battery indentification and alarm, backfeed protection(BFP), anit reverse polarity connection, eliminating sparks by soft start.  It has been certified for the safety standard EN60335 -1/2-29 and AS NZS60335-1/2-29 Household and similar electrical appliances - Particular requirements for battery chargers.          

• Input :100-240VAC, 50/60Hz
• Output voltage : 17.5 ～29.4VDC
• Output current : 4.2A +/-200mA 
• Inrush current : Limited 15A for a cold start
• No load standby power ≤0.5W
• EAveragefficiency: 88% Min.
• Operating temperature: -10℃～+45.5℃
• Storage temperature: -40℃～+75℃
• Operating relative humidity: 5%～95% RH
• MTBF: 30000 hours full rated load operation at 25℃
• Case dimension: 166X66X38mm
• Warranty: 3 year