Stocking stuffer alert! Amazon has their #1 bestselling external battery phone charger marked down to $16.99 (from $39.99). Choose from several colors, and get free Prime shipping as well. Over 9,000 customers give it a near-perfect 4.5 out of 5 star rating. You can recharge the Astro on your computer USB port, and take it with you when you need a quick charge!