Description:The TK15 is a new type of the high precision current collection capacity indicating parameter instrument, which is for lithium battery,lithium iron phosphate batteries,lead-acid batteries and nikel-metal hydride batteries,hereinafter referred to as coulometer. It can collect the working state of the battery at anytime. It has various fatures,such as a wide range of operating voltage, low power, high accuracy in indicating. It can set the payload capacity and other parameters of batteries arbitrarily, and with automatic memory function when power down. Specifications:Type: Battery testerModel: TK15Operating voltage range: DC8-80VCurrent: 50AOverall Size: 66x40x10mmDisplay area size: 32x23mmExternal normal Sampler Size:23x18x5mmTechnical Parameters:Working power consumption: 8.0mA (Max:10.0mA)Standby power consumption: 0.5mA (Max:0.8mA)Sleep power consumption: 50uA (Max:60uA)Voltage acquisition accuracy: +/-1.0%Current acquisition accuracy: +/-1.0%Using ambient temperature rang: 0-35CBacklight on current: 40mA (Max:50mA)Backlight off current: 30mA (Max: 40mA)Battery capacity setting value: 0.-590AhBuilt-in sampler working current: 5.0a (Max:10.0A instant)External normal sampler working current:30.0A (Max:50A)External big sampler working current:50.0A (Max:100A)Attention:The min voltage of the battery pack should higher than the min working voltage of the coulometer Features:1.The empty and full voltage of battery can be adjusted2.The backlight automatic open when using3.Automatic memory function when power down4.Fast response rate5.Low power consumption, automatic wake-upDisplay:1.Residual capacity of battery (Ah or mAh)2.Capacity percentage and totem pole display3.Battery voltage4.Battery current5.Powe output6.Remaining for time of charge and discharg Package include:1 x 50A Battery Tester1 x Shielded Wire(If you need instructions, please contact us and we can send it by e-mail) Note:Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.Please allow 1-3mm slight deviation due to manual measurement. Thank you!