No load, no voltage output.The use of MCU program precision control, to avoid sparks, improve reliability. The use of synchronous rectification solution is able to improve power efficiency by approximately 3% compared to conventional Schottky rectification, reducing charger temperature. Specifications: Brand: YHWSHINE Input Voltage: AC 100-240V Total output power: 45W Output Voltage: DC 14.5V Output current: 3.10A Output Tips: "L" Tip InterfaceCompatible with: MacBook: 13" Core Duo, Core Duo, Late 2006 Core 2 Duo, Late 2007, Mid 2007 Core 2 Duo, 13.3-inch, And so on Black Santa Rosa, White Santa Rosa. Apple MacBook: MA254LL/A, MA255LL/A, MA472LL/A, MA699LL/A, MA700LL/A, MA701LL/A, MB061LL/B, MB062LL/B, MB063LL/B, MB061LL/A, MB062LL/A, MB063LL/A. a1374, a1244, a1269, a1370; For MacBook Air 13.3" Model A1369 For MacBook Air 13.3" Laptop - MC965LL/A mc965ll a(July, 2011) (Latest Model) For MacBook Air 13.3" Laptop - MC966LL/A mc966ll a (July, 2011) (Latest Model) For MacBook Air 13.3" Laptop - MC965X/A (July, 2011) For MacBook Air 13.3" Laptop - MC966X/A (July, 2011) For MacBook Air 11.6" Model A1370 For MacBook Air 11.6" Laptop - MC968LL/A mc968ll a (July, 2011) (Latest Model) For MacBook Air 11.6" Laptop - MC968X/A (July, 2011) For MacBook Air 11.6" Laptop - MC968B/A (July,2011) (Latest Model) For MacBook Air 11.6" Laptop - MC969LL/A mc969ll a(July, 2011) (Latest Model) For MacBook Air 11.6" Laptop - MC969X/A (July, 2011) For MacBook Air 13.3" Laptop - MC503LL/A (October, 2010) For MacBook Air 13.3" Laptop - MC504LL/A (October, 2010) For MacBook Air 11.6" Laptop - MC505LL/A (October, 2010) For MacBook Air 11.6" Laptop - MC506LL/A (October, 2010) Warranty: 1 year Warranty, 1month money return guarantee