Eton Boost 4200 Li-Ion Backup Battery Pack - Black
The powerful, pocket-sized backup battery pack that fully charges most smartphones twice plus it can charge tablets.
Backup battery pack with rechargeable 4200mAh lithium ion battery.
Fully charges most smartphones two times when fully charged.
Single USB output to charge a smartphone or a table.
LED battery charge indicator.
Shake unit to check battery level.