1, What is Wireless Charging?

--- Wireless charing is not required to charge mobile devise via connected USB cable.

2, How many standards are there for Wireless Charging?

--- The most popular wireless charging standards includes PMA (Power Matters Alliance), qi (Wireless Power Consortium) and A4WP (Alliance for Wireless Power). CHI power bank is based on qi standard design.

3, How is the efficiency of wireless charging for qi standard?

---Owing to wireless charging is using coil to transfer radio frequency to electronics power, the alignment of coil position and the distance of 2 coils will impact to the charging efficiency. The best charging efficiency of qi is around 60% to 70%.

4, What kind of water proof technology is CHI power bank using?

--- CHI power bank is using Nano-coating technology, the thickness of nano-coating is around 0.3μ. It is different from the products selling in the market which is based on mechanical design. This is the reason why our CHI power bank can be thinner than other power banks.

5, CHI Nano Coating water proof vs. mechanical water proof

--- Except Nano-Coating, CHI power bank also has Over Voltage, Over Current and Over heating protection design. If CHI power bank falls into water accidentally, protection circuit starts immediately. As long as CHI power bank was taken out from water, after adequate drying, you can continue to use CHI power bank. Comparing with other company's mechanism waterproof design, if there is seepage inside the power bank, it is likely to cause an internal short-circuit and cause serious damage to the Lithium battery which might lead to an accident.

6, Can CHI power bank support charging and discharging in parallel?

--- CHI is designed to support both charging the mobile devises (wired and wireless at the same time) as well as CHI power bank at the same time. But CHI power bank is designed to supply electronic power to mobile device more stably. The CHI is prioritized design to charge mobile devices. When a mobile device is fully charged, CHI will then charge the power bank itself.

7, Battery capacity vs. Rated Capacity

--- Battery capacity refers to the charge capacity of the battery itself, the rated capacity was converted from the actual capacity of the battery it can charge for mobile device. Most of the lithium battery voltage general specification is 3.7V, when you charge your mobile device the voltage needs to boost from 3.7V to 5V, and the conversion efficiency will be lost during conversion process. The conversion efficiency depends on each manufacturer's design capabilities. CHI power bank conversion efficiency is about 75%.

8, Lithium Battery types

--- Currently lithium batteries used in power bank in the market can be divided into lithium-ion and lithium polymer batteries

9, What is Quick Charge

The regular standard charging is used with 5V/ 1A which is 5W charging base, as long as the charging is bigger than 5W will be called "Quck Charing".

10. What is the Quick Charging specification?

Currently the most common QC technology is leading by Qualcomm, in addition Pump Express Plus by MediaTek and mobile phone make OPPO also released the "VOOC" QC technology.

11. The extended QC 2.0 quick charging technology

So far Qualcomm is the most widely used quick charging technology solution provider, based on Qualcomm QC technology various smart phone companies offer different types of quick charing technology such as Turbo Charger by Motorola, Rapid Charger 2.0 by HTC, World Charger by Verus, Wall Charger by Pure-Gear and MDY-3-EB by Xiaomi as well as Fast charge Technology by Samsung is also originated from Qualcomm QC 2.0

12. Can QC Power bank or the QC AC Adapter can be performed QC 2.0 speed charging for smart phones?

---Basically whether it can support QC 2.0 will be depended on the smart phone specification.

13. The Power Bank, AC Adapter and the smart phone are all supported for QC 2.0, how come they still can not be used under speed charging?

---When using Qualcomm QC 2.0 technology, both the charging and charged end needs IC for communication. Foro the USB cable you can buy in most market places, some can be used in regular charging but can not be used for data transmission. Therefore, the USB cable is crucial for QC 2.0 speed charging which needs to support data transmission.

14. The factors which influence quick charging.

--- The Power Bank, AC Adapter and USB cable quality which support QC 2.0 are crucial to impact the quick charging efficiency."

15. Is it dangerous to use quick charging for the smart phones or AC Adapter which do not support QC 2.0?

-- Basically quick charging requires both ends to have QC chip to be able to communicate with speed charing. If there is just the charging end to have the quick charing capability, it still can only be charged by regular charging speed."