The spelling of the word "rechargings" might seem confusing at first glance. However, it simply follows the pattern of adding the suffix "-ings" to the verb "recharge". This suffix is pronounced as /ɪŋz/, which represents the voiced sound of "z" at the end. Thus, "rechargings" is spelled with a single "r" followed by the suffix "-ings", indicating the action of recharging on multiple occasions. This spelling is correct and commonly used in English.