Stable 5V/2A output for fast and efficient charging of smartphones, tablets, and other USB devices. Integrated power management chip protects against overcurrent and overload. High compatibility with standard 3.7V Li-ion 18650 cells and similar lithium batteries. Upgraded charging board designed for DIY portable power using 18650 lithium batteries. Intelligent control for charging and discharging, extending the life of lithium batteries by preventing overcharge, over-discharge, and short circuits.
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