I'm looking to purchase a few of these so I have a few spare. But they are only $2 and the shipping is $14. It's still $14 if I order 10 of them.
Either from the US or SIN store.
or
http://www.store.revolectrix.com/Cellpro-Battery-Pigtail-10-5-Position?ext=F
As the Singapore store seems to be cheaper with UPS shipping.
So is there anyone else on here looking to build a Mitsubishi Heatpump controller with either a Wemos D1 or similar to control their heatpump as that seems to happily work with it as per: https://community.home-assistant.io/t/mitsubishi-ac-with-wemos-d1-mini-pro/107007