https://electronics.woot.com/offers/anker-anker-a110b-bulk-anker-prime-power-bank-20-100mah-3z-0 20,100mAh 3-Port Anker Prime 220W Max Output Power Bank (A110B) on sale for $109.99. Shipping is free for Amazon Prime Members (must log in with your Amazon account and select a shipping address in order for Woot to apply free shipping) or is $6 per order.