The 1250W Power supply can charge your ElecHive 2500 from empty to 90% in around 2 hours and 90% to full in round 0.5 hours. It works on the voltage of most countries. 100~130V (For North America, Japan and Taiwan) or 200~240V (For other countries) RoHS, CE, and FCC compliant. Specification Model: CH1250 Size: 9.3*5.1*2.8in/235*130*70mm DC Output Rated Voltage: 48V Voltage Deviation: +-5% Rated Power: 1250W Open Voltage: <48.5V Current Range: 0~26A AC Input Voltage Range: 100~130V ( For North America , Japan and Taiwan ) or 200~240V (For other countries) Current: 12A/120V or 6.5A/220V Frequency: 50/60Hz Protections Overload, overcurrent, short circuit, overtemperature(>212?/100°C), IP22 Environmental Conditions Working Temperature : 14?~104?/-10°C~40°C Storage Temperature: -40?~176?/-40°C~80°C Working Humidity: 20%~90%RH Storage Humidity: 10%~95%RH