You can inspect this video clip for a more thorough procedure on exactly how long does Epsom salt take to revive a battery this is done. Observe the storage space temperature when measuring the open circuit voltage. An amazing battery lowers the voltage slightly and a cozy one boosts it. Utilizing OCV to estimate state-of-charge jobs best when the battery has actually relaxed for a couple of hours, due to the fact that a fee or discharge flusters the battery and misshapes the voltage. The cost of batteries continues to climb rapidly. The typical expense of lithium and lead acid variety from $17k-$ 20k.