For the Girl on the Go: Heyday 4000mAh Power Bank The Heyday 4000mAh Power Bank ($20) is such a useful gift that comes in a variety of different patterns and colours. It's perfect for the girl on the go who needs to keep her phone charged at all times. It's a gift that she'll use and appreciate. Image Source: target.com Heyday 4000mAh Power Bank $20 from target.com Buy Now