Our 2 to 4 battery cells package for power banks is an ideal way to promote your brand while providing your customers with a practical and convenient solution for their mobile charging needs. This battery package is designed to accommodate a single battery that can be used to power up any USB-enabled device, such as smartphones, tablets, and other electronic gadgets. To help promote your brand, we can imprint your company logo on the battery package. For 2-4 battery cells power banks. Example PB867 Free if purchased with same quantity of power banks; QUR if shipped separately.