A reviewer used the Nestout 28W four-panel solar charger to keep a phone, camera and backup batteries running through a five-day Montana backcountry media trip of rafting, fishing and camping without grid access.

Unfolding the panels, hanging them from loops or tilting them on Velcro stands aims them at the sun, though the display then sits inverted and lights automatically in daylight. Output stayed modest at 24 percent efficiency, so a spare battery rose only 5 percent after hours of afternoon sun and would need a full day to near 75 percent.

Heavy-duty water-resistant materials endured dirt, sand, dew and drops while stored in a dry bag when idle. The reviewer now packs the 130-dollar unit for remote hunting and fishing trips and finds it useful only for those often away from outlets, noting it outperformed cheaper smaller models yet wishing it charged faster.