How to get a Dell AC adapter replacement in the right place? I think it is bound to be the primary question users have thought seriously about before they have any idea about their destination products. After all, there? no the best 65W laptop charger but the most appropriate one. From the internal structure, PA21 charger is manufactured by 5 output integrated circuits with switch-mode from 100V to 240V. The external shell is also produced by customized fireproofing materials. With dual protection, PA21 has the ability to cope with all the charging requirements flexibility. One of 5 internal circuits is used as temperature detection while the cut off system can react once too high temperature has existed just as the reactions to overcharging. On average, this sort of Dell laptop charger has better stability and longer service life.