Features: 100% Brand New And High Quality Suit to Lead acid or gel batteries Can be used on 12 Volt battery systems ONLY Automatic charging without over charging Short Circuit Protection Over Current Protection Battery Polarity Reversal Multi Colored LED display for status indication RED Led on when charging GREEN Led on when fully charged Specifications: Model: 12V 6A Charging voltage: 14.4V Charging current: 6A Rechargeable range: 28-63AH Float voltage: 15.2V Input voltage : 220V AC 50HZ Power supply wire length: 85cm Output wire length: 37cm Size: 150 * 105 * 60mm ( L*W*H ) Color: yellow Net weight: 376g Package includes: 1 x 12V Rechargeable Battery Charger(US Plug) Note: If the LED color can't be changed from RED into the GREEN it means that the battery may be broken and you need to check if the battery is broken in advance For the battery if you don't use it for long time or Lack of electrolyte the voltage will be much lower and the battery will be easy got broken and battery will not been charged any more.