I have a remote control car that has a dedicated control and receiver at
some unknown to me frequency.
Not bluetooth or wifi.
It was a Christmas toy.
It is a substantial car nearly 18" long.
It uses a 8.4v nicad battery that I cannot find and really want to NOT use.
I can get the battery specs if needed.
The car is on vacation in the mountains right now. lol

I want to replace with Li Ion cell type.

I need help designing the replacement.

Suggestions or instruction please.

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