Sorry about the late reply. I purchased a key, but no still no charger yet.

Do I need to test the batteries if it's new? I put the key in and it shows a full battery and "1.21" on the clock. Is that 1hr 21mins?

As for the charger, are you saying you received the #996514001 when you purchased a new 2021 model but are instead using the 140448001? Did you buy that separate or was it from your first mower? Sorry, a bit confused on what you said there as it sounded like you were recommending against purchasing it.

By the way, they are both up to ~$450 now. :-)

Someone in another thread mentioned purchasing this golf cart one ($120), but I don't want to risk damaging the mower to save $300.