“GGMM E5 has built-in high capacity rechargeable lithium-ion battery that supports 15 hours of playtime at 20 Watts output.” TabletsAndroid15 Hours Playtime20w Output Author:GGMM E5 Wireless Bluetooth 4.0 Superior Sound Speaker
“GGMM E5 Wireless Bluetooth 4.0 Superior Sound Speaker with 15 Hours Playtime, Enhanced Bass Built-in Mic for Hand-Free Function Charging Port for iPhone 7, tablets, Android, 20W+ Output (White)” TabletsAndroid20w Output White Author:GGMM E5 Wireless Bluetooth 4.0 Superior Sound Speaker