Sony Ericsson T66 Extended lithium ion battery 750mah Battery Capacity: 750mah high-density 3.7V Grade A Japanese cells Type: Lithium Ion, No memory effect, IC Smart Chip Technology Perfect Fit, Finish, Color to match your T66 Excedes OEM/Government Specifications 100% Buyer Protection Guarantee. Color: White (Internal battery) T66 cellphones Each T66 Extended Life Battery is tested before it leaves our ISO 9002 Certified Factory and meets or exceeds all OEM/Government standards. Each battery charging cycle gives you over 50% more power integrity over cells produced in China. In other words, our T66 batteries have a cycle life over 500 charges where most others have up to 300 cycles @ - 20% degradation. In addition to our current battery line, our factory manufactures batteries for several OEM names such as Alcatel, Sony Ericsson, Toshiba and others. Buying Power = low-price on quality products.