FAQs
#1. What is “Protocol”?
The fast-charging protocol is a technical standard jointly developed by mobile phone manufacturers and charger manufacturers, aiming to achieve fast charging between mobile phones and chargers.
Through the fast-charging protocol, the charger can identify the needs of the mobile phone and provide the corresponding voltage and current, so that the mobile phone can be fully charged in a short time. At present, the most mainstream fast charging protocols on the market include USB-PD, QC, SCP, FCP, etc.
#2. What is “Private Protocol”?
The private protocols of charging heads of major manufacturers refer to the fast-charging protocols developed by mobile phone manufacturers to improve the charging speed of their mobile phones. These protocols usually only support their mobile phones and are not compatible with mobile phones of other manufacturers. The main reasons for the emergence of private protocols are as follows: To improve the charging speed: Private protocols can improve the charging speed through higher charging power, more flexible charging strategies, etc.
#3. Why the power bank or charger cannot support the power as the items advised?
There are so many aspects that can affect the charging speed: temperature, cable, protocols, stability, etc. When your computer or phone's battery remains high, like 80%, the charging speed will also not be so high, the purpose is to protect the battery. Macbooks and iPhones have a battery protection option, which will protect the devices ruined by third-party chargers or power banks, to protect the battery, also to prevent the third-party chargers.
#4. What is “typical capacity” and “rated capacity? How do I understand it?
Typical capacity: for example, the factory produces 100K battery cells, 99% of the battery cells are 5000mAh, and the rest are 4500 or 5100. Then this number "5000mAh" is the typical capacity of the battery cell.
Rated capacity: It is the amount of electricity released by the battery cell under specific voltage, current and specific conditions. For example, the 5000mAh battery cell can release 5000mAh of electricity at 5V/3A. However, temperature, cables, etc. will affect the actual amount of electricity. The electricity will be consumed by heat, and the heat will take away some electricity. For example, the internal resistance, length, and material of the wire will affect the transmission of energy. This is like the fuel consumption of a car. The nominal fuel consumption is the value measured under specific conditions in the laboratory. However, in actual use, many behaviors will affect this value. For example, the fuel consumption of frequently stepping on the accelerator is lower than that of lightly stepping on the accelerator. The material of the tire and the amount of friction will also affect the fuel consumption. The energy of the power bank is the same. The actual length, material, temperature, etc. of the wire will affect it. So to calculate the real capacity, you need to look at the rated capacity.
#5. Why your GaN charger can’t reach max power when I use the single or all the port?
The full power of the charger is the speed under ideal conditions. In reality, many factors affect it, including temperature, so that the claimed 100W charger cannot reach 100W. Whether using 1 port, or multiple, or all ports. When multiple ports are used at the same time, the power of the charger is the sum of the output power of these ports. Almost all charger brands will intelligently allocate power. When you use multiple ports together, the output power of each port will be limited. Since the power will be affected by factors such as temperature, the total output power of multiple ports will also be affected by factors such as temperature, rather than simply adding up the maximum power allocated to each port. At the same time, the state of the charged device will also affect the power of each port. For example, if the power of the mobile phone is relatively high, the output power of this port will be very low.
#5.1. Why each port of the GaN charger can’t reach 100W or specific speed?
In theory, it is possible. In practice, no manufacturer will do this. This involves knowledge such as circuit structure. Generally speaking, take the Sharge 100W charger as an example. Both ports C1 and C2 can reach 100W when used alone. But if each port C1\C2\C3\A can reach 100W, is it feasible? The answer is feasible. Most 100W chargers with 4 ports will only do 2-way DC-DC. That is, C1 and C2 are on the same circuit, and C3 and A are on another circuit. In this way, C1 and C2 can reach 100W when used alone. But now if each port is to reach 100W, 4-way DC-DC is required. But no manufacturer will do this. One reason is that the cost is very high. Another important reason is that the purpose of the GaN charger is to make the volume smaller and the power higher. To achieve the above goals, the charger will become very large. At the same time, a heat dissipation module needs to be added. Because each power increases and the temperature increases, the circuit of each port needs to be cooled. So to sum up, due to factors of cost and actual usage, no manufacturer makes such a charger.
#6. Why Shagre power banks and GaN chargers can’t charge my phone at a high speed?
Many factors will affect it, such as: whether the protocol is supported, the battery level of the phone, the phone temperature, the ambient temperature, the device usage status (whether the screen is on, etc.). Usually, when we say high-speed charging, we specifically refer to the use of a specific brand of equipment and its charging equipment. For non-brand charging equipment, it is impossible to achieve high speed, only low speed, or the power of the authorized third-party charging equipment of this skin.
#7. What is “Wh”, how can I understand it? Or how to calculate the number?
Wh is read as watt-hour, which is a unit of electricity and represents the amount of work done by electrical energy; mAh is read as milliampere-hour, which is a unit of battery capacity and is usually used as a battery charging and discharging indicator.
Watt-hour = voltage * milliamperes /1000.
How to calculate the Wh of a power bank? First, you should know how many packs of the power bank. For example, Shargeek 100 has 4 battery packs, each battery pack has 2 battery cells. The voltage of the battery cell is 3.65V, 2 cells capacity is 3200*2=6400mAh. 3.65*6400/1000=23.36Wh. 4 packs, the total Wh is 23.36*4=93.44Wh≈93.5Wh.
This Wh is also related to the connection method of the battery cells, series and parallel.
Series connection increases voltage, and parallel connection increases capacity. For example, if you have two 1.5V, 2000mAh batteries, you will get a 3V, 2000mAh battery when connected in series, and a 1.5V, 4000mAh battery when connected in parallel. Parallel connection of batteries is suitable for situations where the voltage remains unchanged but the current needs to be increased. Series connection of batteries is suitable for situations where the current remains unchanged but the voltage needs to be increased. Whether in series or in parallel, the output power of the battery pack increases.
For example, Shargeek 100, the battery cells are 4 Series connection and 2 parallel connection, based on the above words, the Wh of Shargeek 100 is 3.64V*4*3200mAh/1000=93.44Wh.
#8. How to use Sharge SSD Case?
Please check this video:
https://drive.google.com/file/d/1TBXFzFwHcqZfboEscfEpu6OJxX5kxO6K/view?usp=sharing.