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  • High compatibility:S4 compatible with not just 20700, 26650, 18650 Li-ion batteries(not include), but also cylindrical rechargeable batteries on market. To be specific, 3.6/3.7 V Li-ion batteries 21700 18500 18350 18490 18350 RCR123 and Ni-mh/Ni-cd batteries AAAA AAA AA A SC Cthat length ranging from 12 to 27 inches, up to 12 inches in diameter
  • Large LCD display:Integrated LCD panel clearly displays charging parameters and process (Battery type, voltage , time , charging percentage, charging capacity , Auto alert indication for worse battery cell); Reverse protection, precision end-of-charge voltage detection, over charging timeout protection
  • Battery detective and charge smartly:S4 can detect different battery types and smartly allocate current and voltage accordingly. In other words, it can charge different batteries at the same time
  • Output options: 0.5a / 1.0a / 2.0a output options,S4 support 3 currents output options, up to 2.0a

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