Safe Assurance: It is designed with 6 protection functions to ensure that the battery can avoid overcharging, overload, over-current, overheating, over-voltage and short circuit when in use. Make sure you can use the battery safely. For dewalt 20v max battery Tool: Our 20V Max battery compatible with dewalt 20v battery DCB205 DCB206 DCB204 DCB203 DCB201 DCB200 DCB207 DCB208 DCV580 DCB180 DCD740 DCD780 DCD785C2 DCB181 and so on. In order to prolong the life of the battery, it is recommended to make the battery to cool down after use or fully charged before charging or using it, so as to prevent the battery from being overheated and damaging its life With Led Indicators: Our 20V Max lithium-ion battery replacement for dewalt 20v battery can show battery power and usage level. In addition, it is as easy to install and remove as your original battery For dewalt battery charger: Our 20V MAX battery and charger combo for DEWALT come with a 365-day warranty, if there is any problem with the 20V Max battery and charger combo during use, please contact us at any time. For dewalt battery charger: Our 20V MAX battery and charger combo for DEWALT come with a 365-day warranty, if there is any problem with the 20V Max battery and charger combo during use, please contact us at any time.