Uniross UCU007 Twin 9V USB Charger Battery Compatible Types: 9V Compact Mini Charger Convenient USB Charging Port Pentashield Protection Bright Blue LED Indicator Compatible Charging Battery Types: 9V Technology: NiMH Min Charging Time: 9V 5 - 7 hours Input Power: Micro-USB Charging Indicator: LED Wrong Polarity Protection: Yes Short Circuit Protection: Yes Alkalines Detection: Yes Bad Cells Detection: Yes Negative Delta-V Cut-Off Protection: No Safety Timer: Yes Temperature Protection: No Sound Indication: No Charging Cable Included: Yes