FoneFill FF1000 Secure Bar and Restaurant Phone Charger Power Bank PORTABILITY  Take it anywhere you need to charge your tablet or Smartphone, camping, business trips, long trips in the family van STACKABLE  The stacking feature supports charging of multiple devices with limited footprint. It saves valuable space, clutter, and power outlets when charging multiple FoneFills EXTENDED POWER LOSS PROTECTION  Protect the family and business when confronted with extended loss of power due to severe weather or unforeseen catastrophe where phone capability is essential SECURITY  Each FoneFill has a metal-reinforced security slot that easily attaches to the optional cable lock so your investment in protected DURABILITY  Plastic injection molded, with a matte finish that resists fingerprints and scratches, and easily wipes clean with a damp cloth