This power bank kit comes with protection function: Charging overcharge protection, over-discharge protection, overcurrent protection. Intelligent output device after charging full, automatically stop charging, to prevent mobile phones overcharge. Output voltage and current stable, will not harm user devices. Specifications: Micro USB input: 5V 1A USB Output: 5V 2.1A / 5V 1A(Dual USB interface) Charging display: intelligent digital display Batteries Type: liquid lithium-ion batteries (18650) Features Of Power Bank Case: You can use only 1 cell also Color: white Material: plastic Weight:70g. Size:15*6*2.3cm. Input: Micro USB DC 5V Output: DC 5V/2A or DC 5V/1A Press Once, to check the electricity of the battery; Press twice, LED lighting is ON or OFF Battery Type: 18650 lithium battery is 3.6-3.7v(batteries not included) LCD indicator on the front cover, showing the capacity, charging status and on/off status With side switch for checking battery status and LED flashlight You can put 1 to 5pcs 18650 battery for one time and please use the same type battery Can discharge to load and charge the 18650 at the same time Compatible for 5x 18650 lithium-ion rechargeable batteries(batteries not included) 18650 battery holder case holder Fit for iphone6 and other smartphones This product is easy to use. Package Includes: 1x Solderless LCD Display Dual USB DIY Power Bank Module In Pakistan