If the battery does not charge, try again or try trickle charging with low current like C/20 until voltage rises to a level your charger allows it to charge. Although, there are many ways to fix it. You can check the voltage of the battery using a Digital Voltmeter (DVM). This guide provides the safe, expert steps to bring them back, extending their lifespan and saving you money. As NiMH cells have very low output impedance due to their very low ESR, use thick wires that don't melt under the possible 10-20A of battery. . If you've ever faced frustration with a NiMH battery that just won't hold a charge, this video is for you. But why does this. . Nickel-metal hydride (NiMH) batteries are known for their reliability and durability, but they can degrade over time due to factors like memory effect, cell imbalance, or physical damage.
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