About GoMax 18650 Li-ion Rechargeable Batteries
Model Number: GMX-BTLN186D34
Size: Ø 18.6mm x H: 69.2mm (including protection and button top)
Nominal Capacity: 3400mAh
Nominal Voltage: 3.7V
Discharging End Voltage: 2.5V
Charging Current (Std): 1.62A
Charging Voltage: 4.20 +/-0.03V
Protection Board Current Control (High Current): 9A
Protection Board Function: Avoid over-charge, over-recharge and overcurrent
Main Features: High Rate Discharge, No "Memory Effect", Short Circuit, Over-Charge and Discharge Protection
Weight: less than 48.5g
Operating Charge Temperature: 0ºC ~ +40ºC
Operating Discharge Temperature: -20ºC ~ +60ºC

About GoMax 4S Smart PowerBank:
2-in-1: 18650 Battery Charger + Smart PowerBank
Input: 5.0V/ 1A
Output: Dual USB: 5V/ 1A; 5V/ 2A
Max Nominal Capacity: 13,600mAh
Dimensions: 130mm x 85mm x 25 mm
Compatible Battery: 4 pcs 18650 Li-ion Batteries
Feature: LCD Capacity Display
Package: 1 x GoMax S4 Intelligent Power bank, 1 x USB cable (210mm)
Net Weight: 113g (without Batteries)
Gross Weight: 160g (without Batteries)

• Package contains 4 (four) GoMax 18650 3400mAh 3.7V Li-ion Rechargeable Batteries and 1 (one) GoMax 4S Smart PowerBank [Black]
• GoMax 4S Smart PowerBank is a dual function portable charger. Included 18650 Li-ion batteries can be replaced at any time (We recommend GoMax 18650 3400mAh 3.7V Li-ion Rechargeable Batteries)
• With dual Output USB, 2 devices get charged simultaneously. Also GoMax 4S Smart PowerBank adjusts automatically its output according to the connected device. It is compatible with all popular smartphones and tablets from Apple, HTC, Google, Samsung, and BlackBerry, as well as lots of cameras, handheld gaming devices, MP4, MP5, etc
• Intuitive Display: When charging the batteries, LCD displays input charging status. When charing the device, LCD displays output voltage and output current. Large Capacity (is up to you) can reach 13,600mAh with the included 4 GoMax Batteries, but also works with 1, 2 or 3 batteries
• High Level Protection: Output Overcurrent Protection / Input Overvoltage Protection / Electro-Static Discharge Protection / Overheat Safety Protection / Output Overvoltage Protection / Intelligent Output Identification / Battery Overcurrent Protection / Input Overcurrent Protection / Prevent Current Reverse

Package contains 4 (four) GoMax 18650 3400mAh 3.7V Li-ion Rechargeable Batteries and 1 (one) GoMax 4S Smart PowerBank [Black]GoMax