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A asks: How can I check the energy density of a cell volume?
Answer: If the Li-ion cell is an INR18650 3.6V-2200mAh type, its calculation formula is 3.6 x 2.2 ÷ (0.9 x 0.9 x 3.14 x 6.5 ÷1000) = 480Wh.L

B asks: How can I assess the quality of cells?
Answer: * Li-ion cells are tested and approved by a Separator.
* Quality testing is conducted using an Electronic testing machine system.

C asks: How should Battery Packs be inspected?
Answer: Battery Packs must undergo repeated charging and discharging using an Aging machine.

D asks: How can I check samples?
Answer: Random inspections are conducted using a testing machine to measure battery voltage, capacity, and data information.

E asks: How should batteries be stored?
Answer: Batteries should be stored with their current level maintained at around 70%~75%.
How can the batteries be protected?
1. Keep the battery charged at around 65% when storing for a long time.
2. Avoid fully charging or discharging the battery and keep it charged at around 65%.
3. Do not store with metals; it is best to use a battery case.
4. Store the battery in a cool, dry environment with temperatures between 15°C and 25°C and humidity between 45% and 70%, avoiding temperatures above 90°F (32°C).
How to ship the batteries?
1. Li-ion batteries must undergo security testing using a Security machine.
2. Li-ion batteries have obtained the MSDS & UN38.3 Certificate.
3. The batteries should be packaged in individual boxes, with no more than 10kg per carton.
4. If the batteries exceed 100 watts, please ensure they are packaged in UN-approved boxes before shipment.
My questions?
My questions are:
Why won't the battery charge?
Why isn't the battery compatible with my machine?
Why does the battery fault when stored for a long term?