The main difference between lithium batteries and nickel-hydrogen batteries is that lithium batteries are more suitable for mobile phones, but in digital cameras, nickel-hydrogen batteries are better because of the considerable demand for current and much more power consumption than mobile phones.
Advantages and disadvantages of lithium batteries
Advantages: No memory effect, lighter weight.
Disadvantages: high cost, low current, not able to withstand overfilling (compared with nickel-hydrogen).
Lithium batteries have primary lithium (non-rechargeable) and secondary lithium (rechargeable). Secondary lithium batteries are divided into Li-ion lithium-ion batteries and Li-Polymer lithium polymer batteries.
Generally, digital cameras use secondary lithium (rechargeable), which is lighter in weight and 48% higher in volume energy density than Ni-MH batteries. Because of this, the production and sales of lithium-ion secondary batteries are gradually exceeding that of nickel-hydrogen batteries. This kind of battery has little self-discharge and no memory effect. The number of charge and discharge can reach more than 600 times. Especially Li-Polymer lithium polymer battery has developed in recent years, besides its smaller size, it is not limited by the general cylinder or square shape of the battery, and its weight is lighter.
Because lithium batteries can not bear overcharge, if used carelessly, there will be a risk of explosion, so it needs built-in control IC to prevent overcharge, but the cost is also relatively much higher. Because the specifications of lithium batteries are not uniform, there will be cases where organic batteries can not be purchased after shutdown. But it has improved a lot.
Advantages and disadvantages of Ni-MH batteries
Advantages: Low price, strong versatility, high current, environmental protection and stability.
Disadvantage: Large weight, short battery life.
The design of Ni-MH batteries originated from Ni-Cd batteries, but great progress has been made in improving the memory effect of Ni-Cd batteries. The main change is to replace the cadmium used in the negative electrode with hydrogen storage alloy, so the Ni-MH battery can be said to be a typical representative of material innovation. Nickel-hydrogen batteries cause much less pollution than nickel-cadmium batteries containing cadmium. Therefore, nickel-cadmium batteries have been gradually replaced by nickel-hydrogen batteries.
Except for a few lithium batteries (NIKONEN-EL1 and 2CR5), most of the lithium batteries have no alternatives to batteries, which is very troublesome for a long time to go abroad or for a large number of users. NiMH batteries have no such problems. Digital cameras using NiMH batteries can usually be replaced by alkaline batteries.
The Difference of Charging Mode between Lithium Battery and NiMH Battery
Many consumers in the use of batteries, there are often the same concept of battery use, now lithium batteries have become the mainstream, but the previous use of nickel-hydrogen batteries is still used in lithium batteries, in fact, lithium batteries and nickel-hydrogen batteries in addition to products, the use of different ways.
Newly purchased lithium batteries: First use natural shutdown for the first three times, then use the original direct charge to charge the cell phone until it is full, and then continue to charge for about 1 hour (more than 2000 MAH for about 2 hours).
Daily: Full can be, full follow-up can not exceed 1 hour. Avoid late night charging (high grid voltage). Batteries can be used with charge and can be used for alarm or shutdown. Pay attention to the use of shutdown batteries as soon as possible charging, otherwise the battery will self-discharge, if voltage continues to decline, it may lead to self-locking protection that can not be charged. Get into the habit of charging when you get to work during the day and home at night, and unplugging the power supply before you leave or go to bed.
Usage: General lithium batteries can be charged, used and stopped at any time. Cyclic life refers to the number of full charge and full discharge. Partial charge and discharge can be understood as a fraction of primary life. The key to battery use: the battery is full and can be charged for 20 minutes to half an hour to achieve saturation, but it must be avoided to charge for a long time after filling. Continuing charging for a long time after full-time will lead to side effects. The result is that the capacity decreases and the internal resistance increases, resulting in capacity reduction and shutdown as soon as a call is made. For PPC and other charged chip machines, it is best to use until no electricity recharge, mainly to consider the issue of electricity display measurement.
Continuing to charge after the battery is full will do great harm to the lithium battery. If the battery is charged continuously after full charge, side reactions will occur, active substances will decrease, garbage will increase, capacity will decrease, internal resistance will increase, serious overcharge will directly damage the battery structure, leading to battery scrap. Now some chargers also provide charging protection mode, which can effectively protect the battery according to whether the battery is full or not.
Lithium-ion batteries can be charged at any time, which has limited impact on life. For charged metering batteries such as PPC, it is recommended to charge after automatic shutdown in order to avoid impact. It can be charged at any time and stopped at any time. If it is full of charging, it will affect the battery life.
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