The homogenization of automotive electronic GPS navigators is more serious. It is best to compare several brands before buying to see whether the function is applicable. At the same time, try to choose well-known brands with good reputation on the market and buy them on the regular website to get good. After-sales service guarantee, to avoid losses caused by some businesses after "delisting". As there are many brands of car GPS navigation system products in the market, and the quality of GPS navigator products focuses on after-sales maintenance, purchase of products of well-known brands can relatively guarantee product quality, after-sales service and user benefits.
The "core component" in the automotive electronic GPS navigator is not a hardware device, but the map and navigation software used by it. Due to special reasons, the current map providers are relatively concentrated, but the different versions have a greater impact on the price, which will directly affect the actual use effect. You should understand the version of the map used by the product, the update cycle, the update method, whether to charge, how the merchant gives Support and other issues.
Focus on product performance rather than price.
Therefore, the purchase of GPS needs to pay attention to the performance of the product, rather than buying lower-priced products. When paying attention to product performance, there should also be exaggerated and misleading instructions in the manual, such as tracking sensitivity. Since this index is one of the key parameters of GPS performance, the current manufacturers are very high on this index, but in fact, due to the current There is no clear test method, and this indicator lacks practical availability.
Don't forget to check the accessories in the package because you are happy when you buy a car GPS navigator. Check carefully to see if the product manual, car bracket, power supply, memory card, data cable, etc. are complete. If there is a shortage, you must ask on the spot to let the merchant fill in the accessories or change to a new product without unpacking. It is recommended that when purchasing an on-board GPS navigator, the merchant should also be required to issue an official invoice as evidence for the future maintenance of rights and interests, fill out the warranty form, and ask the merchant to know clearly under what circumstances the product can be returned, warranty and other matters. Knowing in advance is better than anxious to get angry afterwards!
Although "a penny for a penny" is a well-known saying, it still needs to be learned. At present, there are many brands of car GPS navigators on the market, and quality and service are inevitable. Some unscrupulous merchants use consumers' psychology of pursuing high quality and high prices to carry out overwhelming advertising and promotion, and then calculate this part of the cost in the product cost Consumers eventually pay. The product price is not low, but the function is not necessarily different.
Li-ion Battery With SMBUS refers to the battery datas can be collect through equipments based on SMBUS data communication, it usually applied to the military grade battery which need higher safety level protection .but as these battery have SMBUS inside ,it also should meet these requirements as :
1.The rated voltage is high (the operating voltage of the unit is 3.7v or 3.2v), which is about equal to the series voltage of three nickel-cadmium or nickel-hydrogen charging batteries, so as to form the battery power supply group
2.The self-discharge rate is very low, which is one of
the most prominent advantages of the battery. At present, it can reach less
than 1% per month, less than 1/20 of the nickel hydrogen battery.
14.8V Li-Ion Battery With Smbus
Items specification
Charge voltage : 16.8V
Nominal voltage : 14.8V (4S4P)
Initial impedance : 200mΩ
Nominal capacity: 10.4Ah
Minimum capacity : 10.0Ah
Communication methods : SMBUS data communication
Charge current : Standard Charging::0.5C5A (5.20A
Rapid charge 1.0C5A C(10.4A) Max
Standard Charging method: 5.20A(0.5C5A) CC(constant current)charge to 16.8V,then CV(constant voltage 16.8V)charge till charge current decline to ≤104mA(≈0.01C5A)
Charging time: Standard Charging:4.5hours(Ref.)
Rapid charge: 2.5 hours(Ref.)
Max.discharge current: 10.4A(1.0C5A)
Discharge cut-off voltage: 11.0V
Shelf life: 2 years
Cycle life (0.2C5A/0.2C5A) : 500 times,≧80%DOD; 500 times,≧80%DOD
Li-ion Battery With SMBUS
Li-Ion Battery With Smbus,Lipo Battery,Battery Pack With Smbus,Smart Li-Ion Battery Pack With Smbus
YFJ TECHNOLOGY (HK) CO.,LIMITED , http://www.yfjpower.com