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.
Tourists consume more tap water than they realise. The scheme tap water is actually safe to drink. When tested the various readings were on a par with the scheme water in Western Australia. However many hotels operate from bore water. This is not safe to drink.