According to Macworld, the Apple Magic Mouse 2's built-in Li-ion battery should be good for a month's use. It & the Magic Keyboard 2 are both fast-charging devices, the mouse can get enough charge for 9 hours of use from a 2-minute charge. So the fact that they automatically disconnect from Bluetooth when charging is not really a problem. Just plug one in & take a short break, you probably need it. Come back a few minutes later & unplug, it will re-pair with Bluetooth without intervention.

The 2009 MacBook Pro I've been de-crufting scored about 15% higher on Geekbench 3 than others of that year & model. this is because the 5,400 rpm HD was replaced by a 7,200 rpm one, for that very reason: to speed things up. In those days SSDs were horribly expensive.

Time Machine backup on the 12-inch G4 PowerBook wasn't proceeding. Out come the big guns: hit it with Diskwarrior 5. All fixed, now backing up OK.

No backups done to the old 12-inch G4 PowerBook since March 8, 2017. Because that's when I could last find the specialised FW 400/800 adaptor & FW800/SATA interface cable & hard drive.
Yet, last night, when I needed that same adaptor & cable, I found them immediately. They were, oddly enough, where I'd left them.
SuperDuper! clone has been done, now working on the Time Machine backup.

Not fun. Massive leg cramps for the last few minutes. No position is comfortable. Still in spasm. And, just quietly, agony.

Yep. It's all good. Mavrix & Snow Leo working on separate partitions. iPhoto put up a bit of a struggle but it works now.

Just heard a startup chime from the other Mac, maybe Mavrix has installed properly.

15 minutes for Mavrix now.

They do appreciate it. Before I bought the now-dead 2011 MBP, I owned the ver same Mac that I'm fixing up. The User group at the time I was selling the old one needed a reasonably modern Mac to run their lending library database & play a few games. It was to replace an ancient PowerBook Duo 280c which used HyperCard as the database. The MacBook Pro after I sold it to them used Delicious Library in place of HyperCard.

#IMissHyperCard

Mavrix installer reckons it wants 25 minutes more to complete the installation. But I'll just wait & see, such estimates tend to be wildly optimistic sometimes. Once, with the 2008 MacBook Pro, the Mountain Lion installer was stuck showing 19 minutes remaining and didn't advance from there at all over the next three DAYS. #ICanBeQuiteStubbornWithGettingMacInstallationsWorking