Luna sells a charger, that has percent charge switch. I use one for my 10s. they make a 13s and a 14s. They could easily sell a 12s model. If there is enough interest, I would contact them about ordering them also.
Here is the one I use. 36v 4amp Luna Mini Charger - Luna Cycle
There are already Chargers in Alibaba.
Good news, there are instructions on how to turn the 13s charger into 12s.
How to adjust the Luna charger (mini and advanced) - Electricbike.com Ebike Forum
With charge percent switch? With usa plug? link?
Here you go…
https://a.aliexpress.com/_mqX1wI4
You can usually order Plug types for each country. Just tell them.
Yeah no. A switch to turn off charger at 80/90/100 percent charge.
An interesting idea, but I think until one exists it’s not too hard to just adjust cutoff in your smart bms if you’re using it
“AC input: 180V-260V AC, 47 to 63Hz”
Not a good idea for those of us in the US.
Coincidentally, I’m in the middle of a dispute with an AliExpress seller over a charger that claimed to support 110 or 220v, and actually only supports 220.
I just got one of these but haven’t made a cable for it yet. The voltage is adjustable, and I’m told that it switches automatically from constant-current to constant-voltage when the voltage limit is reached, so it might be practical to set it at, for example, 48v for a 12s pack if you want longer life or headroom for a downhill segment at the start of your ride.
Adjustable Power Supply Gophert | Gophert Power Supply Cps 6005 - 6017 Switching - Aliexpress
^ That is NOT the seller that I opened the dispute for, btw. This seller lists 110 and 220 options, as they should. 