Which of the following battery chemistries is rechargeable?

Modern electronics and amateur radio equipment rely on several types of rechargeable batteries, technically known as secondary cells. Nickel-metal hydride (NiMH) and Lithium-ion (Li-ion) are highly common in portable radios (handheld transceivers) and modern consumer electronics. Lead-acid batteries are larger, heavier rechargeable batteries traditionally used in automobiles and as backup power sources for amateur radio base stations. Because all three of the listed battery chemistries are specifically designed to be recharged and reused hundreds or thousands of times, 'All these choices are correct' is the only fully accurate answer.