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Check the listing for details. High Current 3A Polymer Ternary Lithium Battery Charging Board CC/CV 5V To 4.2V. Condition: New. Listed at 1.58 USD. Default 3A, remove resistor 2A, replace with 135k resistor 1A. Charging current: 3A (can change current by adjusting resistance). Conversion efficiency: 3A 93%, 2A 94%, 1A 95% (data is for reference only).
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