ESYB E4 18650 Intelligent Charger 4 Bay, USB Universal Battery Charger With APP Display and Bluetooth, Rechargeable Battery Charger For vtc6, vtc5, 25R, 30Q, Power Bank Bluetooth/APP function.Installation Environment: Over Android 4.3 or over IOS 7.0 LCD screen display charging mode and battery status of all slots compatible with: Li-ion, LiFePO4 batteries:10440/14500/14650/16340/16650/17650/17670/18350/18490/18500/18650/22650/26500/26650 Ni-MH, Ni-Cd batteries:AAAA/AAA/A/A/SC/C/D Support Li-ion, LiFePO4, Ni-MH, Ni-Cd batteries. 0.25A charging current for Ni-MH and Ni-Cd battery; 0.25A, 0.5A, 1A, 2A options charging current for Li-ion and LiFePO4 battery USB output port. Can charge phones and PCs when disconnect adapter. Overtime Prevention,Anti-reversing protection,Short-circuit Protection,Over-current Protection,Over-voltage Protection