充电盒：充电盒PCBA板D4位号的ESD管损坏，导致充电盒探针端口无5

Charging case: charging case PCBA board D4 bit number of tubes ESD damage, leading to the charging case no probe 5v output port can not be charged to the headphone, ESD tubes have been sent to vendors, since the analysis need to return the original analysis <br>headphones: product placement too long, leading to product battery is below the cutoff value (2.8v automatic protection), so when the product failed to show the first time to charge the headset charging indicator, the consumer can not see the product charge will not turn on, mistaking products It has been damaged. Such products require activation charge 10 ~ 30min (the length of time related to the battery voltage level), the activation can be used normally. <br>Also, please refer to the attached battery capacity test <br>battery Analysis Summary: <br>1, our products can be properly placed in a single earphone time: 55mAH * 80% (our shipping capacity requirements more than 80%) * 1000 / 10.2uA ( PCM measured interval maximum of 2.7uA, BT IC dark current of 7.5uA) / 24H / 30day = about 6 months <br>of this batch of product of our November 2018 production, shipping date for the December 2018 and March 2019. <br>2, so we hypothesized that product placement too long, failed to aging charged, resulting in headset battery discharge (quiescent current products will continue to consume battery power when the batteries into the protected status, so long low placement cell voltage will continue to consume) <br>3, over-discharge after the battery voltage is low, earphone PCBA board activates a pulse voltage slowly charging the cartridge battery charging headset, but requires a certain time, it normally takes about 10 ~ 30min (determined according to the battery voltage level), during activate the headset can not mention use of the boot, and sometimes the product voltage is too low, the headset can not display the charging indicator.

Charging case: charging box PCBA board D4 bit number OF ESD tube damage, resulting in the charging case probe port no 5v output, can not charge the headset, ESD tube has been sent to the supplier, due to analysis needs to be sent back to the original factory for analysis<br>Headphones: the product is placed too long, resulting in the product battery power below the cut-off value (2.8v automatic protection), so the first time the product to charge the headset charging light failed to display, consumers see the product can not charge can not turn on, mistakenly think the product has been damaged. Such products need to be activated by charging 10 to 30min (the length of time is related to the battery voltage), and can be used normally after activation.<br>Also, refer to the accessory battery capacity test<br>Summary of battery problem analysis:<br>1, our product single headset can be normal lying time is: 55mAH x 80% (Our shipment requires more than 80% of the electricity) x 1000/10.2uA (PCM measured interval maximum of 2.7uA, BT IC dark current 7.5uA) / 24H/30day x about 6 months <br>This batch of products is for our company in November 2018, shipped in December 2018 and March 2019.<br>2, so we speculate that the product placement time is too long, failed to carry out aging charging in time, resulting in the headphone battery over-release (product static current will continue to consume the battery when the battery enters the protective state, so long time low power placement, cell voltage will continue to consume)<br>3, the battery after the voltage is low, charging the charging case to the headset when the headset PCBA plate pulse voltage will slowly activate the battery, but it takes a certain amount of time, generally need about 10 to 30min (according to the battery voltage decision), in the activation of the headset lifting is not powered on to use, and sometimes the product voltage is too low, the headset is not able to display the charging light.

Charging box: the ESD tube of D4 bit on PCBA board of the charging box is damaged, resulting in no 5V output at the probe port of the charging box, so it is unable to charge the headset. The ESD tube has been sent to the supplier, which needs to be sent back to the original factory for analysis<br>Headset: the product is placed for a long time, resulting in the battery power of the product is lower than the cut-off value (2.8V automatic protection), so the headset charging indicator light is not displayed at the first time when the product is charged, the consumer sees that the product cannot be charged and cannot be started, and mistakenly thinks that the product has been damaged. This kind of product needs to be charged for 10-30min for activation (the time is related to the battery voltage), and can be used normally after activation.<br>Also, refer to the accessory battery capacity test<br>Battery problem analysis summary:<br>1. The normal placing time of single earphone of our product is 55mah * 80% (more than 80% of the power required for delivery of our company) * 1000 / 10.2ua (the maximum measured value of PCM is 2.7ua, the dark current of BT IC is 7.5ua) / 24h / 30day = about 6 months<br>This batch of products are produced by our company in November 2018, and the delivery dates are December 2018 and March 2019.<br>2. Therefore, we speculate that the product has been placed for a long time, failing to conduct aging charging in time, resulting in over discharge of earphone battery (the static current of the product will continue to consume the battery power when the battery enters the protection state, so the battery voltage will continue to be consumed when the product is placed for a long time with low power)<br>3. After the battery is over discharged, the voltage is low. When the charging box charges the headset, the pulse voltage of the PCBA board of the headset will activate the battery slowly. However, it takes a certain time, generally about 10-30min (depending on the battery voltage). When the headset is lifted, it can not be turned on for use. Sometimes, the product voltage is too low, and the headset can not display the charging indicator light.