Egypt used several electric batteries and a VAJRA in a box for electric energy production.

Stone wall Images of  old electric batteries found in Egypt. See also the Ankh and dual connection rods. also: https://youtu.be/MVaZ-ZHtfn0 

see also: https://www.disclose.tv/enigma-at-dendera-ancient-egyptians-had-electricity-and-batteries-315746

What is in the box? 

I suggest dual stable micro Ball Lightning black holes inside a VAJRA ! Produced by Dual Solenoids with B=0 fields focused at the ends.

according to Q-FFF Theorie, see  also: https://vixra.org/pdf/2005.0212v1.pdf or: https://vixra.org/author/leo_vuyk

also: https://bigbang-entanglement.blogspot.com/2016/09/was-ark-of-covenant-and-vajra-antenna.html

Baghdad Battery

Even the Tabernakel is supposed to have had a comparable energy source with plasma ( H2?) clouds above..

Free Vacuum Energy from two Negative Charged Black Holes (string knots) in an electric adapted modern VAJRA 

6 or 8 (bifilar solenoids) B=0 North+ South monopole Interference  with 3 or 4 compound Rigid String particle knots (below) able to build the more complex Black Hole knot, with internal positive and external negative charge. According to Quantum FFF Theory.

 

Micro Black Holes Fermion repelling and Self Propelling by plasma tails.