This weapon is illogical. The transference of any kind of energy onto the shield of another ship weakens that shield, yet somehow this new weapon not only can repair a shield by transferring energy to it, it can also discern between a shield mounted on a friendly ship and a shield mounted on an enemy ship?
Anyone got any pointers to where the workings of this technology are explained?
Well, you could explain it by frequency resonance.
Light is basically photons traveling at a frequency. Lasers are basically focused beams of photons (usually all in one frequency).
The resonance frequency is basically the frequency of an object that has the least resistance to oscillation. So if the Laser frequency is tuned to the resonance frequency of the shields, you are basically transferring the energy of the laser onto the oscillation of the shield, recharging it in a way.
NOTE: The physicist under us would argue that resonance is basically a destroyer, and not a healer, as when you are resonating you are basically oscillating out of control, making it an effective shield destroyer instead of an healer, but lets leave it at that...
I basically try to physically explain everything in this game, to increase my immersion. For instance, the sounds I hear outside my ship (explosions and so on) are basically electromagnetic longitudinal waves that reach the hull of my ship (would also explain the huge weight of the sensors!) and are translated by the sensors of my ship into the human hearable sound range, as to aid to the surrounding awareness of the pilot. (which in my opinion is pretty critical in space).
But, as the use of the Shield Cell Bank has the negative effect of heat production, I would argue that this should be also the case when a laser is recharging the shields (maybe not in the same extend).