We usually choose the lithium battery will be according to their own needs to choose a suitable battery to use, and is based on engine type or types of conditions to select the battery size, and can quickly improve the economic benefit of lithium battery, which when selecting a battery is the most important thing you know what? The key: is the leading cause, the life of the battery can't just buy the home did not use long already can't use, and in use is to buy better quality. 

　　And battery when starting the engine output current is very big, in the case of general is about 150 a to 200 a and at low temperature [- 10 degrees] when it comes to high output current of 250 a to 300 a, so if the capacity of the battery and generator doesn't match the capacity of the battery will become small, so the engine starting resistance is very big, and small battery capacity of the battery will accelerate in the case of violent discharge on the unit of the active material and the reaction of sulfuric acid, so that the higher temperature of the battery, and because the plate more than load will make it become bent, the best result can cause a lot of active material loss, and can make plate early damage, thus shortening the life of the battery will be many, so if it is a battery of electric capacity is slightly larger, even if is not going to happen the problems above but also there will be no more fully active substance, so the battery economy will drop, all in that we buy the battery charge capacity and must match engine, and in selecting the capacity of the battery needs to according to the machine power of the engine, and according to the load of electric equipment to make a decision.