When choosing a battery, usually feel confused about what type of battery is more suitable for the equipment, and do not know which one meets their needs, or mainly do not know enough about the battery, so what are the differences between NiMH and lithium batteries, and how should I choose?
First, the size of the difference
Relatively speaking, the volume of lithium batteries is smaller than the volume of NiMH batteries, because the same volume of lithium battery capacity is higher than NiMH batteries, so lithium batteries are relatively small, relatively light weight, easy to carry, and therefore very suitable for a variety of new mobile devices, such as cell phones, computers, PDAs, etc.. Lithium batteries have no memory effect, so they can be charged as they are used. The memory effect of NiMH batteries is low, and it is generally better to recharge the battery after the power is consumed, but now the NiMH batteries are not very influential even if the power is not completely consumed and then recharged. In addition, the self-discharge rate of lithium batteries is very low, so the power stored in the battery can be maintained for a long time.
Second, how much power
There are many differences between NiMH batteries and lithium batteries, the amount of power stored is one aspect. Buyers are generally very concerned about the battery power, and nickel-hydrogen batteries, lithium batteries have a greater specific energy, that is, the same volume of the battery contains more power than nickel-hydrogen batteries, so like the batteries we use for cell phones is usually lithium batteries, its light weight and small size, but also to meet the demand for a certain electric capacity.
Third, self-discharge effect
As the name implies, self-discharge is the power consumption of the battery when not in use, that is, the ability of the battery to maintain power, the greater the self-discharge effect, the use of more trouble, because it may at any time face the situation of insufficient power. There is a difference between the self-discharge rate of lithium batteries and NiMH batteries, the self-discharge performance of lithium batteries is far better than NiMH batteries, but there are some high-performance NiMH batteries with ultra-low self-discharge products, the preservation time of its power is also quite long, the self-discharge of lithium batteries is almost negligible, but there will be the case of capacity stagnation. In a way, lithium batteries can be considered as a new battery better than NiMH batteries, and can be used as a better alternative to NiMH batteries.
Fourth, the size of the specifications
The size of the battery specifications are unified according to the model, but the NiMH battery due to its own material, so there are fewer ultra-high-capacity monoblocks on the market, while lithium batteries have more than 20Ah large monoblocks, and even some monoblocks up to 100Ah, lithium batteries do high-capacity battery packs, more easily.
Fifth, the application areas are also different
With the popularity of computer and cell phone use, the market demand for cell phone batteries is increasing, especially with the largest consumption of lithium batteries for cell phones, in addition to the digital electronics industry, lithium batteries are also widely used in new energy vehicles, communication base stations and other places. NiMH batteries are generally used in electrical equipment, lamps and lanterns, electronic toys industry.
The difference between NiMH batteries and lithium batteries is still very big, but NiMH batteries are more environmentally friendly than lithium batteries, but due to the limitations of their performance and energy density, so it also limits the use of NiMH batteries
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