Portronics SoundDrum POR-821 Wireless Bluetooth 4.2 Stereo Speaker with FM, USB Music (Grey)

From the manufacturer

Battery : 1800mAh Lithium-ion

Bluetooth: 4.2 Bluetooth technology, 250% faster, and more secure. Compatible with both Android and iOS. For a wired input, just use a 3.5mm AUX, or a good old Pendrive.
Long-lasting Battery: 1800mAh Li-ion battery, charges 100% in just 2 hours, so you can watch 3 movies back to back for up to 7 hours.
IPX6 rating: Water and sweat resistant, stays protected against splashing and light rain. Take your groove with you!