... Battery Charger,Battery Charger,Universal Battery Charger,Mobile Phone Charger,Camera Batery Charger (MA-002)Features Auto-polarity detection - Conversion (APDC ... protection of lithium batteries and extend the life ofHelp Input: USB 5V Output: 4.2V, <300mA Fixed Battery: If the ... touch the battery electrodes with good contact. Charge to confirm: USB = 5V, the green light flash that enter the state of ...