... 500AhBattery voltage can be made from 3.7V to 400VApplications:Bluetooth Devices; Mp3, MP4; Earphone; Digital Pen; Wireless Mouse ... battery solution development. GBP is able to provide you with complete start-to-finish design and manufacturing services. Design system ... mobile devices, such as cellular phones, notebooks, handheld computers, bluetooth products, PDAs, MP3/MP4, portable DVD and CD players, ...