Please take care to only use a compatible USB2.0 5V1A (1 Amp), power adaptor which is authorized to use with your device. It is important to use the appropriate Power Charger for the Safety of your product.
Please note: Your cable and speaker may become damaged if you use a power adaptor that has more than 1 Amp.
As example, you may use the Apple iPhone Power Adaptor to charge your speaker that is packed with your iPhone and iPad Mini for those that are noted as 1 Amp, however you may not use the Power Adaptor that is included with your iPad or computer since the Amp of these accessories are greater than 1 Amp.
Please see where to locate the Amp information here on the back of an Apple Power Charger:
The 1 Amp requirement applies also to Android devices.
If you are not sure what Power Charger to use, please do not attempt to charge your product to avoid possible damage. Please first check with the manufacturer of the Power Charger for the Amp amount or you may contact Nima Support and we will be happy to assist you.