Expand your brand identity and recharge your next promotional campaign with these power banks! Designed to charge most phones, MP3 players and more. Each power bank features a 2200mAh lithium polymer grade A non-recycled battery, a USB output, micro USB input (cord included) and a LED indicator light. You just need your phone's charging cord to charge your device. With customization options, you can create a giveaway that's ideal for traveling, long drives, corporate events, tech giveaways! 3.72" L x 0.87" W x 0.83" H