I have a project in mind where I replace the tinny 40mAh LiPO battery of a "smart band" (Like a Mi Band 1) and replace it with a regular 18650 LiPo battery, so it last a long time without recharging. That would be simple, but what about if I have two of them?
My plan is to wire the battery to a TC4056A 1A battery charging board, and the loads in parallel.
I've been told by a friend that that's fine, but I have absolutely zero formal training in electrical engineering and I'm unsure about what I'm doing... that's where I ask you. :)
Also, would you change something to make the circuit better and/or safer?
Any help is appreciated. Thanks!