Ok. Here is how I did it:
From Play store, "WEMO" and "WEMO CHARGE".
(If you do not mind the constant switching on-off when the device reaches set charge percentage and then falls 1% below, that is all you need.
I found that annoying,so:
Get "Task Kill" plugin for TASKER
PROFILE 1:
For device charging and battery percent say 90 --> Action Wait 5 seconds then kill "Wemo Charge" using "Task Kill" plugin.
PROFILE 2:
For device NOT charging and battery percentage say 60 --> Launch "Wemo Charge"
This way is all kept locally without the need to send messages to IFTTT.