I have a persisting issue with an irregular charge of my laptop, where the connector will flash green every four seconds and charge the battery to 100% over 10 hours instead of 2.

I´ve tried:

• battery replacement (this solved the sudden onset of battery drain which occurred overnight after a longer period of intermittent system crashes)
• SMC reset
• leaving the charger unplugged for a potential ´reset´

Should I buy a new charger or troubleshoot something else?

Will my current charger potentially damage the new battery?