If your mobile phone is running slowly or always losing battery, it might have been hacked to mine cryptocurrency – here's how to protect yourself - Business Insider

A single smartphone doesn't have the necessary processing power to mine cryptocurrencies, but together, many devices can allow hackers to successfully do so. According to a experts at internet security firm ESET, alarm bells should ring if you notice your phone overheating, running slowly or the battery running out inexplicably quickly. All of these symptoms could be a sign that your phone has been hacked by a cryptojacker. ....
https://www.businessinsider.com/cryptojackers-are-targeting-mobile-users-and-could-destroy-your-phone-2018-8