@streakmachine I started my collection of Ryobi battery tools about 16 years ago with a hammer-drill using 2 NiCad batteries. Later I bought a wet & dry vacuum & a twin-tube fluorescent lamp. When those batteries died I discovered the One + batteries were compatible so I bought a 1.3 Ah lithium battery & charger to see if it would work.
Since then I've bough more batteries, some genuine & some cheapies from Amazon, I have three 2.5 Ah & a 5 Ah. Other tools are a multi-tool, 12-in bar chainsaw, tyre pump/air bed inflator, line trimmer with nylon cutting blades & last summer I was contemplating getting a misting fan.
@streakmachine If you can manage OK without the "juicy cameras" the 2nd gen SE is quite a good phone, containing most of the iPhone 11's components in an iPhone 8 shell. The 12 & 13 Minis are both smaller with bigger screens than the SE 2.
@variablepulserate I think this is the one, https://www.amazon.co.uk/ELECJET-PowerPie-20000mAh-Portable-Compatible/dp/B081S471NN/ref=sr11?crid=37KZOK6JWIYJZ&keywords=ELECJET+PowerPie%7CUSB+C+Power+Bank+45W&qid=1641181795&sprefix=elecjet+powerpie+usb+c+power+bank+45w+%2Caps%2C745&sr=8-1 - the entry in the Amazon Oz store is different but the device looks identical.
It contains two batteries of 3.7v @20,000 mAh but the actual output is 13,500 mAh.
Wouldn't you know it? Just after posting here about my proposed charge regime for the M1 MacBook Air it stopped charging. By a process of elimination, I deduced the supplied USB-C cable was crook & only connecting intermittently. Temporarily rectified by using a different cable, I have no shortage of those. I'm actually using the Sugru-repaired cable from the 2017 MacBook Pro.
I contacted Apple Support via the iPad app and eventually an appointment was made at the nearest Apple Store (18km away) for Wednesday afternoon, which was the first available time-slot. Under Covid rules, Apple stores are only open by appointment.
I'm planning on following the recommendation of an Australian YouTuber who suggests the best chance of the longest Apple laptop battery life is to keep the charge between 50 & 80% of the maximum.
Earlier in the week I bought a 13,500 mAh (output) battery capable of charging at 45W via PD/USB-C. My M1 MacBook Air's charger supplies 30W. The battery has a separate USB-A port rated at up to 18W although if used in conjunction with the 45W USB-C port the output drops from 18W to 10W. The USB-A port has a low-power mode for circuits requiring less than 200 mA. This will make it easy to maintain the M1 MacBook Air within the 58-80% range by freeing me from the need to charge via mains power.
Classic Aussie Xmas dessert. Pan-fried Xmas fruit cake warmed through & served with a splodge of butter.