... indicator 3.Reverse polarity connect protection 4.CE,RoHS,PSE 30W Li-Ion Battery Charger for Laptop / Power Tool Technical dataMax ... connect protection General specification3-step charging control(pre-charge-CC-CV)Option: a) NTC inside b) 100% cut off when battery ... : EN60335, IEC60335, UL1310EMC standard: EN55014-1, EN55014-2, FCC Part15 30W Li-Ion Battery Charger for Laptop / Power Tool