1 Overview 1.1 Scope This product specification applies to lithium-ion battery manager Ningbo Chi Fei Electronic Technology Development Co., Ltd. provides the manager applies to 14.4V Cordless Power Tools products. 1.2 Description 1.2.1 Product Name: Lithium Manager 1.2.2 Model: FST-D98-401A 2.1 electrical characteristics, functions and parameters Topt = 25 ℃ bulleted details overcharge protection standards VDET1 overcharge detection voltage 4.225 ± 0.05V / cell tVDET1 overcharge detection delay time> 1.0s VREL1 overcharge release voltage of 4.1 ± 0.05V / cell over-discharge protection VDET2 overdischarge detection voltage 2.7 ± 0.1V / cell tVDET2 overdischarge detection delay time <1.0s VREL2 overdischarge release voltage When 3.0 ± 0.15V / cell overcurrent overcurrent value IOL 29 ± 3A T overcurrent protection 800ms delay release condition disconnect the load temperature protection when charging charging temperature protection thresholds (self-healing) 50 ℃ discharge discharge temperature protection The critical value (off load recovery) 70 ℃ charging voltage VCHM maximum charging voltage 25V Operating Temperature -20 ~ 55 ℃; Humidity:. MAX 85% within one month storage temperature -20 ℃ ~ 55 ℃ 3 months -20 ℃ ~ 45 ℃ 6 months -5 ℃ ~ 25 ℃ d98-404b