Bluetooth speaker with FM Radio - Yellow This standalone speaker produces amazing CD quality stereo sound. Ideal for portable music players such as iPod or smartphones, you can remote control the volume and playback from the onboard controls allowing you to hide away your music player or phone. And talking about phones, this wireless speaker can also answer your phone via handsfree. What is the difference between batteries? The latest development with Lithium-Ion (LI) battery technology has been the introduction of the Lithium Polymer based battery. Not only does the Lithium Polymer battery last longer, the battery is no longer limited to traditional battery cylindrical shapes. The battery can now be moulded into a customised shape to fit inside any product making it the choice for manufacturers developing the latest slimline and stylish devices. For best results and like with all other batteries, LI batteries should always have top up charges if put in storage for extended periods of time.