I need to attach a charger to this circuit, but I don’t have much understanding of circuits, and I don’t know how to do it safely.
I would like to wire something like this
Into the circuit so I can charge it easier without having to take it all apart and using alligator clips. Can I just solder the female directly onto the battery. Or do I have to do something else? All help is much appreciated!

 

You connect the charger to the Red and Black wires, the blue is probably a thermistor to the black wire for Temperature monitoring.

 

You connect the charger to the Red and Black wires, the blue is probably a thermistor to the black wire for Temperature monitoring.

wires running all the way to the left are connected with a coil for heating e-liquid.
but you say that I can connect the charger directly to the red and black wires that come out of the battery?

 

For a start, do you have the correct LiPo charger? If not, make sure you get one, otherwise you are just making a bomb.
One off these may work ok. These are available on Ebay or similar. make sure you get the version that has OUT + and OUT- as some do not.

The battery connects red to B+, black to B-.
Then, your heater element red to OUT+ and black to OUT-
Use USB power for the charger input.

 

I can connect the charger directly to the red and black wires that come out of the battery?

As long as the charger is for LiPo and it doesn't charge at a rate where it should monitor battery temperature.

 

What is the capacity of the battery? It should be written on the label and is in mAh (Milliampere hours) The charger should not supply more than the capacity current x 0.37. Less than that is all right - it just takes longer to charge.
Keith

 

The charger should not supply more than the capacity current x 0.37.

Glad my phone does not do that, it would take over 3 hours to charge.

Bob