Some of the best and brightest Anker power banks are on sale via Amazon and directly from the company. These deals include the 20,000mAh Prime portable charge, which is down to $90 from its usual price of $130. That’s a discount of 31 percent and matches a previous record low. Anker products are all over our list of the best power banks, and we named the Prime charger as the best ultra-premium product on the market. Unfortunately, ultra-premium also means ultra-expensive, though $90 is a whole... Read this story