Home / PORTABLE POWER BANKS / Square Charge 8400 mAh Square Charge 8400 mAh Double USB output mobile power supply, battery capacity: 8400 mah / 3.7 V Category: PORTABLE POWER BANKS Description Description Double USB output mobile power supply, battery capacity: 8400 mah / 3.7 V Related products PORTABLE POWER BANKS Power Tube 3000 mAh PowerTube 3000 is a sleek, portable power charger that comes in several colors, features an LED indicator light PORTABLE POWER BANKS Mobile Charger PORTABLE POWER BANKS Power Charger – 001 PORTABLE POWER BANKS Clear Charger 2600 mAh Single USB output mobile power supply, battery capacity: 2600 mah / 3.7 V