Converting Tom to run on three 3.7 volt rechargeable Li-Po batteries

Decided to convert Tom, as I did Cybot.
Big improvement to the working of Tom adding Li-Po Rechargeable Batteries.

Video showing improved performance from Tom.

Parts Needed:

3D Printed:

New Lower Tail Rib with Battery Holder
STL File: Lower_Tail Rib_with_Battery_Box.stl

Purchased:

3 No. Li-Po Batteries, I am using 1200mAh.

3 No. Connectors that connect to the Batteries. (with leads)

1 No. mini 360 Buck. (DC-DC Drop down voltage regulator, to 9 volt)

1 No. matching Pair (1 x plug and 1 x socket) to connect to Tom. (with leads)

1 No. plug that matches the pair for Tom. (with leads)

The First Step is to add new Power Leads to Tom.

First remove the Top Casing off of Tom.

And remove the Power Plug from the Power Board.
The two screws that hold the Power Board in place will need to be removed, so that the Power board can be lifted slightly, to enable this to be done.

Next, cut the cables about 15mm from Power Plug.
WARNING! Cut one at a time if you have not removed the batteries.

Next, take a matching plug and socket.

The Plug is going to be connected to the wires still attached to Tom.

The Socket is going to be connected to the wires on the plug cut away from Tom.

Connect Red to Red and Black to Black.

It is important which is fitted.

Now fit the cable with Tom's Power Plug back into the Power Board.

Push the Power Board back in correct position and fit the power Boards two retaining screws.

Re-Fit the Top Casing of Tom with the cables passing through hole in the side of the case.

Once Tom is back together. It can be tested to make sure all is correct.

Connect the New Plug and Socket together, and with it's normal batteries installed, it should work as it did before.

The Second Step is to fit the New Lower Tail Rib.

This is just a matter of replacing New for Old.

The Third Step is to wire up the Buck to be connected to the Li-Po Batteries.

Take the three cables with Sockets that fit the Battery Plugs, and wire the as shown:

Next, solder on the Buck.

A little tip. you can notice I poke the wires through the Buck from the top side, and solder them from the bottom side, gives plenty of room for the iron.

Now solder the Plug to the output, this plug to match the socket that was fitted to Tom.

Next, connect fully charged batteries, and adjust the output to 9 volts.

Wrap the Buck in Tape, (I used Blue Masking Tape) leave the ends open so air can flow through for cooling.
Place the batteries in the new holder on Tom and connect the Plug to the new socket.

Should be all good to go.

NOTE!
The Bucks are fitted to the batteries before the switch on the Tom.
Un-Plug the Batteries from the Bucks when not in use.
The Bucks will drain the batteries even if the Tom is switched off.
(If LiPo Batteries are drained below 3 volt, they may be rendered useless).