Are you the one who depends on the phone too much and are always on a look out for a phone charging point?
The phone cases available nowadays and customized tablets carrying bags come fitted with battery charging facility. But if, still need a charging point, you should be looking for an external battery which is also portable. Manufacturers like myCharge and Jackery makes portable battery which come in different capacities and offer you a good solution.
These portable external chargers are loaded with fast-charging power and are convenient to carry. You can use your own cable with the portable battery and charge your battery anywhere. These are themselves re-chargeble batteries and can hold power for months.