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Features: Provides extra backup power to all devices that supports USB charging, E.g. For iPhone, iPad, Android (Such as Samsung, HuaWei), tablets, MP3 players, GPS units, etc. A compartment for 2 x 18650 batteries, portable and convenient to carry. Charge and discharge at same time. Can use 6V 5W solar panels. The battery can be replaced. LCD display Current Voltage Capacity Time. The battery can be replaced . Intelligent power manage IC, overcharge protection, short circuit protection. Battery Type: Lithium-ion. Input: DC 5V/1-2.1A . Output: DC 5V, 1A/2.1A(Adjustable). Input USB-micro B type. Operating temperature 0~40℃. Energy storage battery: Li-ion 2600mAh. Charging time USB-micro B type 2000mA input Approx.: 3-4 hours. Self energy leakage loss under idle mode Approx.: 2mah/Day. Color: white. Size(mm): 113 (L) x 48 (W) x 27 (H)mm. Type: Rechargeable lithium battery. Model: 18650. Voltage: 3.7V. Capacity: 2600mAh. Quantity: 2Pcs. In Built Safety Circuitry. Maximum capacity and reliability. Positive nipple. PCB Protected against. Over charge (4.275 ±0.04V). Over discharge (2.65 ±0.08V). Over current (7-8A). Package included: 2 x 18650 2600mAh Battery With PCB Protected Board. 1 x NKTECH E4s Power Bank Box. 1 x Battery Case. 1 x USB Cable.