Introducing the HKM-859731 Portable DIY Power Bank and Charger, a versatile and customizable power solution designed to meet your on-the-go energy needs. This innovative device merges the functionality of a power bank with that of a battery charger, making it an indispensable accessory for anyone needing reliable power for their devices.

With a compact design measuring 100*84*26 mm, the HKM-859731 is effortlessly portable, allowing you to easily slip it into your bag or pocket. What truly sets this power bank apart is its unique DIY feature—it's designed to be powered by four 18650 Li-ion batteries (note: batteries are sold separately), allowing you to tailor its capacity to fit your specific requirements.

The HKM-859731 is equipped with dual-input options, including 8 Pin and Micro USB, ensuring a simple and efficient charging process. You only need one cable for seamless operation, making it easier than ever to keep your devices charged. This power bank also boasts dual-output capability, enabling you to charge multiple devices, such as cell phones and tablets, simultaneously without hassle.

An independent circuit empowers the HKM-859731 to handle simultaneous charging and discharging, meaning you can charge your devices while also replenishing the batteries of your power bank. The integrated LCD display provides clear insights into the status of each battery, making it easy to track your remaining capacity at a glance.

Safety is paramount with the HKM-859731. It includes reverse polarity protection, ensuring that your devices are safeguarded, as the built-in chip detects any circuit interruptions that may arise from reversed polarity.

Embrace the practicality and adaptability of the HKM-859731 Portable DIY Power Bank and Charger, engineered to support your active lifestyle. It's the ideal companion to keep your devices charged and ready, wherever life takes you.