Wireless Speaker System powered by Lithium Ion Polymer Battery LP755070 3000mAh using unique Radial Soundfield technology to provides a wave of loud, clear, enveloping sound, in any environment. Robust Design,Strong Lithium Ion Polymer Battery –  Go Anywhere Wireless Speaker System has rugged rubber and steel casing, IPX5 water-resistant rating and high density capacity(3000mAh) & long cycles life (more than 500cycls)lithium ion polymer battery make it the ultimate go-anywhere audio system.And it has only 1.5kg(72mmx122x122mm),which means it will be fits easily into your carry-on bag.Obviously,Wireless Speaker System is a wonderful companion on vacation. Whole-house multi-room With One-Button connect you can wirelessly connect up to eight speaker to play a local source or receive music in whole-house,eg. outdoors, bathrooms, kitchens and non-traditional listening environments,and no need wires,WiFi,or app required.Because Wireless Speaker System has its owen 5GHz dedicatied network. What’s more,built in Lithium Ion Polymer Battery is rechargeable,and can continue work up to 8 hours. Lithium polymer batteries have become the preferred energy for portable and wearable electronic prototypes.We collect our lithium ion polymer battery List for 2017 that they are familiar ones with affordable price & great service. If you need to lock your prototype urgently and find fit the best lithium polymer batteries,please contact us now.