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Produino 5V Voltage Boost Mobile Power Module - Green (1A)
Input voltage: 5V£¬ 1A Micro USB; Output voltage: 5V 1A USB; Size: 50 x 20 x 10 (mm); Adapt Battery: polymer lithium battery£¬ 18650 lithium batteries£¬ cell phones£¬ etc. (working voltage 3~4.2V) standard lithium battery. LED status indication: Red: Charging; Green: full; Blue: Load; Battery Connection: B+ must be anode; B- must be cathode Please check and verify a good connection is correct before applying power to avoid burning plate