I recently saw in a forum, a user describes a brand balance wheel to play a few days the battery can not be charged, has been put for half a year, until you ask the person to open the inspection problem and found that plug in the charger after repeated restart, it should be Battery over-current protection, then open the battery check.
After the test, it was determined that the battery was faulty, and the battery was destroyed. It was low-grade and rough, and the fake was judged.
I didn't expect the technology of charging treasure to be applied to the balance wheel battery. I really dared to do anything for the cost. The 4400mah battery pack actually used only 2200mah battery, half of the virtual standard, originally the battery was 2 and 10 strings, and now only 10 strings.
This balance wheel itself uses a good material, it lost on this battery, and after the blue battery check information, it is still lithium iron phosphate battery.
The last picture is a Bluetooth module and speaker that can connect the handset to play music and listen to the speakerphone.