The
transmission distance The transmission distance of Bluetooth speakers is also a problem of public concern. Bluetooth speakers and transmission distance has nothing to do with Bluetooth version, mainly depends on the advanced technology level. The PowerClass2 standard transmission distance of 10 meters; and the upgrade of the PowerClass1 transmission distance to ascend to 100 meters, and provides the Hi-Fi stereo effect. In general, the mobile phone with Bluetooth speaker distance is not too far, the transmission distance compare insurance is about 10 meters. The market reached 10 meters standard Bluetooth speaker.
Version
Consumers buy Bluetooth speakers, often see Bluetooth 1.1, 1.2, 2, 2.1, 3, 4 figures, these figures represent the different versions, ability also represents the Bluetooth speakers and anti interference. 2012 to 2, 3 is the most common new mainstream, 4 has just launched soon. Bluetooth version is different, for the received signal quality. The new version is more emphasized that can overcome the noise interference. The new version can be backward compatible, consumers should weigh the price and demand of.
The built-in battery
Bluetooth digital speakers are built-in battery, so the real wireless. The built-in battery is good and bad directly determines the Bluetooth digital speakers play time and service life. Please carefully about the actual playing time and repeated charge decay times before buying. Try to choose the lithium polymer battery that consumers choose Bluetooth Bluetooth speakers, no explosion danger.
Battery type:
1) polymer battery:
Advantages: safe, efficient, soft no explosion danger.
Disadvantages: mixed type, pure cobalt (good) and pure manganese (poor) polymer battery price several times.
2) 18650
batteries Advantages: the performance is outstanding, the charge and discharge were able to achieve a superior level (used for laptop batteries), with explosion-proof protection
Shortcomings: more disassemble and old batteries. The same 18650 battery good and bad post 5-10 times
3) aluminum shell battery
Advantages: the price is very cheap
Disadvantages: poor performance. There is no proof measures, the explosion consequences.
Battery protection board:
1) the battery charge and discharge protection in non brand battery do more bad, not easy to damage the electric core stability and electronic equipment.
2) unstable current output not only affect the sound quality, and will cause the current sound great.
Good quality battery charging and discharging 500 times can reach 80% initial capacity. The poor quality of the battery charge and discharge 100 times not even up to 50% initial capacity.