You're welcome ... that's the mildest expression I use when dealing with what previous owners have done.
Your old power converter/charger has/had a large Iron-core transformer, with lots of copper wire. The new unit uses solid state electronics ... much, much better. (Lighter and more efficient.)
The charger function in your old unit was probably a manual charger ... constant nonstop voltage continuing even after the battery has boiled dry. (Manual charger = checking every 15-30 minutes to see if battery was approaching fully charged and unplugging charger when close to fully charged.)
The new unit should have, at a minimum, an automatic charger function ... senses when battery is close to fully charged and automatically turns off. (Automatic charger = connect, plug in, and forget ... intentionally.)
If you're lucky, new unit has a multi-stage battery charger function ... usually three stages of decreasing voltage ... bulk, float, and maintain. (Multi-stage charger = battery is 100 percent charged and ready to go when you are.)
On another note, my roughly 10-year-old iMac appears to have gone tango-uniform. No amount of coaxing can get it to do anything remotely resembling stable operation. (Computer stable ... operator never is.) Started last Monday when electric company decided to play yo-yo with the grid.
Tried posting this using our Wii-U ... got most of it composed when Wii had a hissy fit and froze up. (No damage to Wii-U ... can't say the same for my frustration level.)
Wound up using wife's system.
New Mac mini on order and should be here mid to late next week. Meanwhile, articles on hold, research on hold, email piling up, and steadily going crazy. (Okay, crazier.)
