For example, I regularly plug a Micro USB cable into an iPhone charger and charge with that. Cheap, non phone chargers however, may not be regulated, and that could damage your phone. In short: Any cable or charger from an old phone is fine to use if its Micro USB (same connector).
Untreated surface water in rivers, streams, lakes, and ponds is not safe to drink unless it is treated to remove bacteria, viruses, and parasites.
Provided that you take simple precautions, rainwater is perfectly safe to drink (read more in our article Is it Safe to Drink Water from Rainwater Tanks?). Since it is safe to drink rainwater, it follows that bathing and showering in rainwater is a economical and safe way to use rainwater. Not only that, using rainwater for bathing has some great health advantages. Rainwater is naturally soft, meaning there are less minerals dissolved in it than hard water.