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The difference between lithium batteries and nickel hydrogen batteries:

At the same volume, lithium batteries have a larger capacity than nickel hydrogen batteries, so their call and standby time are longer than nickel hydrogen batteries, and their price is also higher than nickel hydrogen batteries. Moreover, in general, nickel hydrogen batteries cannot be charged on demand, greatly reducing their convenience.

The development of lithium-ion batteries started with lithium-ion batteries and then progressed to lithium-ion batteries. Early lithium batteries used pure lithium sheets as the negative electrode. This type of lithium battery is prone to catching fire, causing danger. On this basis, lithium-ion batteries have been developed. The negative electrode of lithium-ion batteries is graphite. The ion conducts lithium ions, not metallic lithium. The security has been greatly improved.

The working voltage of lithium-ion batteries is 3.7V. The volume to energy ratio is higher than nickel hydrogen. At present, lithium-ion batteries have aluminum shells, steel shells, and flexible packaging. Market share in different fields. Some markets are common, such as lithium batteries for mobile phones.

However, due to the previous working voltage of disposable batteries and nickel hydrogen batteries being 1.2-1.5V, and the two connected in series being 2.4V-3.0V. Most electrical appliances have already established this working voltage standard. Such as walkman, radio, etc. So in the field of civilian batteries, lithium batteries cannot yet replace nickel hydrogen batteries. But in the later development of new electrical appliances, such as MP3, MP4, etc., lithium batteries are used as mobile power sources.

So nickel hydrogen, nickel cadmium, and lithium-ion batteries are currently irreplaceable by other batteries in their respective fields.

So chargers are not interchangeable

The charging methods for lithium batteries and nickel hydrogen batteries are different.

Firstly, the single cell voltage of lithium batteries and nickel hydrogen batteries is different. For ternary lithium batteries, their nominal voltage is 3.6V, while their actual voltage range is between 2.8-4.2V, while the nominal voltage of nickel hydrogen batteries is generally 1.5V, with little fluctuation in the actual voltage range.

In addition, the charging method of lithium batteries is different from that of nickel hydrogen batteries. Lithium batteries generally start with constant current, then constant voltage, and finally stop, while nickel hydrogen batteries do not have this process.

Thirdly, if lithium batteries and nickel hydrogen batteries need to be separately combined into battery packs of the same voltage, their combination method and actual voltage will also be different.

In summary, the chargers for these two types of batteries cannot be interchangeable

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