 
Derek S. answered  02/07/22
Chinese Mandarin Tutor for Kids and Adults
我在找一个手机充电器。Or you can remove the particle "a/an" and have 我在找手机充电器。Finally, if you wish to infer that you have been looking for a phone charger for a long time/you are serious about finding a phone charger, you would repeat the verb 找 to show that it's important, 我在找找手机充电器。 All three are correct.
The article "the" does not exist in Chinese. It only exists in English translation of Chinese
Also, fun fact. 找 (look for) depicts a hand 手 on the left and a dagger 戈 on the right. I interpret this as "I am looking for a weapon (to defend myself?).
 
     
             
 
                     
                    