What is the difference between 702035 and 802035 lithium batteries?

1. The specific energy of lithium-ion batteries is much higher, which means that the energy contained per unit volume (weight) is higher than that of ordinary batteries. 2. The working voltage of lithium-ion batteries is high. The normal voltage of lithium batteries is 3.7V, and the total voltage is 4.2V. Ordinary dry batteries and rechargeable batteries are 1.5V, and they will be exhausted at 1.2V. , such as mobile phones, cameras, MP3 players, etc., need to use 3.7V operating voltage, so you can only choose lithium batteries. The camera can also use regular batteries, but two are required. 3. Lithium batteries are environmentally friendly and pollution-free. Its internal material is lithium manganate, or lithium-cobalt, or lithium-iron, and the other is carbon. It does not containno heavy metals such as mercury, nickel and cadmium which pollute the environment. 4. Lithium batteries have broad development prospects and high performance. Its excellent performance in charge and discharge cycles gives it wide application fields and prospects, as well as exceptional value for money.