The difference between lithium batteries and Ni-MH batteries is that lithium batteries are more suitable for use in mobile phones, but in digital cameras, due to the large current demand and much larger power consumption than mobile phones, it is better to use Ni-MH batteries. Some, but many users will have doubts, which is more durable, lithium batteries or nickel metal hydride batteries?
First, the advantages and disadvantages of lithium polymer batteries
Advantages: no memory effect, light weight.
Disadvantages: high cost, small current, not resistant to overcharge (compared with NiMH).
Lithium polymer batteries have primary lithium batteries (non-rechargeable) and secondary lithium batteries (rechargeable), and secondary lithium batteries are divided into Li-ion lithium-ion batteries and Li-Polymer lithium polymer batteries.
Generally, digital cameras use secondary lithium batteries (rechargeable). Compared with nickel-hydrogen batteries, they are lighter in weight, but their volumetric energy density ratio is 48% higher. Because of this, the production and sales of lithium-ion secondary batteries are gradually surpassing that of nickel-metal hydride batteries. This kind of battery has small self-discharge, no memory effect, and the number of charge and discharge can reach more than 600 times. Especially the Li-Polymer lithium polymer battery, which has only been developed in recent years, is not limited by the general cylindrical or square battery except for its smaller size. The shape is limited and the weight is also lighter.see more:custom battery pack designers
Lithium batteries are not resistant to overcharging, and there is a danger of explosion if used carelessly. Therefore, a built-in control IC is required to prevent overcharging, but the cost is relatively higher. Since the specifications of lithium batteries are not uniform, there may be situations where batteries cannot be purchased after production is discontinued. But it has improved a lot so far.
Second, the advantages and disadvantages of nickel metal hydride batteries
Advantages: low price, strong versatility, large current, environmental protection and stability.
Cons: Heavy weight, short battery life.
The design of Ni-MH batteries is derived 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 originally used in the negative electrode with a hydrogen storage alloy, so the nickel-metal hydride battery can be said to be a typical representative of material innovation. The pollution caused by Ni-MH batteries is much smaller than that of Ni-Cd batteries containing cadmium. Therefore, Ni-Cd batteries have been gradually replaced by Ni-MH batteries.
Except for a few lithium batteries that have primary lithium batteries that can be used (NIKONEN-EL1 and 2CR5), most of them have no battery alternatives. This is very troublesome for long-term travel abroad or for a large number of users. Ni-MH batteries do not have such problems. Alkaline batteries can usually be used instead of digital cameras that use NiMH batteries.
In recent years, more and more Ni-MH batteries are used in digital cameras, battery manufacturers are also optimistic about this market, and have launched high-capacity Ni-MH rechargeable batteries, making the technology of Ni-MH batteries advance by leaps and bounds, and the capacity is also increasing. The batteries are comparable, and even the chargers are getting better and better, and the charging time is greatly shortened.
- The difference between lithium battery and Ni-MH battery charging method
During the use of batteries, many consumers often have the same concept of using the batteries. Lithium batteries have become the mainstream now, but the previous use of nickel-hydrogen batteries is still applied to lithium batteries. In fact, lithium batteries are different from nickel-metal hydride batteries. In addition to the different products, batteries are also used in different ways.
Newly purchased lithium battery: use it for the first three times until the phone is turned off naturally, and then charge the phone to full capacity with the original direct charger, and then continue to charge for about 1 hour (about 2 hours for more than 2000mah).
Daily life: just fully charge, and do not charge for more than 1 hour after full. Avoid charging late at night (grid voltage is high). The battery can be charged and used at any time, and can be used until alarm or shutdown. Note that the battery that is used to shut down should be charged as soon as possible, otherwise the battery will self-discharge and the voltage will continue to drop, which may cause the self-locking protection to fail to charge. To form a habit, start charging when you arrive at work during the day and home at night, and unplug the power after it is fully charged or before leaving or going to bed.
Use: General lithium batteries can be charged, used and stopped at any time. Cycle life refers to the number of times of full charge and full discharge, and partial charge and discharge can be understood as a fraction of the life cycle. The key to the use of the battery: the battery is fully charged, and it can be charged for 20 minutes to half an hour to reach saturation, but it must be avoided for a long time after it is fully charged. Continuing to charge for a long time after it is full will cause side effects, resulting in a decrease in capacity and an increase in internal resistance, shortened capacity, and shutdown when a call is made. For machines with power chips such as PPC, it is best to use them until they run out of power, mainly because of the problem of power display and measurement.see more:lithium golf battery suppliers
Continuing to charge the battery after it is fully charged is very harmful to the lithium battery. If you continue to charge after full, side reactions will occur inside the battery, the active substances will decrease, the garbage will increase, the capacity will decrease, and the internal resistance will increase. Severe overcharging will directly damage the battery structure and cause the battery to be scrapped. Now some chargers also provide a charging protection mode, which will adjust the charging mode according to whether the battery is fully charged, which can effectively protect the battery.
Lithium-ion batteries can be charged at any time, and have limited impact on life. For PPC and other batteries with fuel gauges, it is recommended to charge after automatic shutdown to avoid impact. It can be charged at any time, and can be stopped at any time. If it is fully charged and continues to charge, it will have an impact on the life of the battery.