Description: Designed for 15V Lithium batteries, comes with wire, you can use it conveniently Multiple protective functions including overcharge protection, overdischarge protection, overcurrent protection and short circuit protection Balance function ensures each battery cell being fully charged at the same time Can be used to avoid explosion, fire and damage of your battery pack, safe for use Help prolong the service time of your batteries. Specification: Size: approx. 60x23mm/2.36x0.91in Charging voltage: 21 V Charge MOS pressure value: 35 V Discharge MOS pressure value: 35 V Charging current: 56 A Continuous discharge current: 15 A Over current protection: 50/55/60 A Over current protection delay: 20/25/30mS Single section since the power consumption: 30uA Single section between the power consumption: 3uA Single section over charge detection voltage: 4.18- /4.22V Over charge recovery voltage 4.05- 4.15 V Over charge detection delay: 0.5/1.0/2.0S Single section over discharge detection voltage: 2.75-2.85 V Over discharge recovery voltage: 2.90-3.20 V Over discharge detection delay: 0.5-2.0S Short / over / over current protection recovery short circuit / over discharge / over current protection after removal of load auto recovery Short circuit protection delay 200/500/600uS The normal working state of B- to P- resistance: 5m Continuous 15A current maximum temperature : 25 Working environment (humidity) relative humidity: 98% (long-term stability under the humidity) Working environment (temperature) -30 ~ 80(in the lower temperature range of long-term stability) Package Includes: 1 Piece 5S Lithium Battery Protection Board