Mobile Phone Battery Life: Here’s some good advice. Another important point: choose a phone which has a removable battery such as my Galaxy S4 Mini or Della’s Galaxy K – with a 10x optical zoom! We always carry a couple of spare batteries on longer hikes – and a solar charger http://www.theultralighthiker.com/charging/ – I went for the MPJ spare batteries because they already have 50% more energy than the proprietary ones yet still fit in the phone: http://www.nytimes.com/2016/02/25/technology/personaltech/tips-and-myths-about-extending-smartphone-battery-life.html?hp&action=click&pgtype=Homepage&clickSource=story-heading&module=second-column-region®ion=top-news&WT.nav=top-news&_r=0
See Also: http://www.theultralighthiker.com/charging/
http://www.theultralighthiker.com/charging/
