Cheap chargers tend to shorten a batteries life, because they do not have the features needed to properly charge a battery. I have this one, since I needed to charge AAA to D batteries.

https://www.thomasdistributing.com/MAHA-MH-C808M-AA--AAA--C--D-Battery-Charger--TEMPORARILY-OUT-OF-STOCK--expected-ship-date-mid-March_p_244.html?gclid=EAIaIQobChMI176Ou6uC2AIVBCrTCh3jRQOrEAQYAiABEgIhWPD_BwE