XINCHI with brand name SINCPOWER, are professional lithium ion battery manufacture with all production equipments imported from Japan, Canada and Germany.
The18650 cells have better technical performance than those of SAMSUNG. You can see here (the technical data is based on SAMSUNG & XINCHI specification sheet):
2200mAh cell
Items SAMSUNG XINCHI
Capacity 2150mAh Min. 2200mAh Min.
Discharge rate 4400mAh (2C) Max. 8800mAh (4C) Max.
-10 ℃ performance （0.5C discharge) 50% 80.9% (1781.10mAh)
Capacity after 300 Life cycles ≧1500mAh 2176.56mAh
I could send you the official test report if you like.
2600mAh cell
Items SAMSUNG XINCHI
Capacity 2550mAh Min. 2600mAh Min.
Discharge rate 5200mAh Max. 7800mAh (4C) Max.
-10 ℃ performance （0.5C discharge) 50% ≧70%
Capacity after 300 Life cycles ≧ 1500mAh 2394mAh
I could send you the officical test report if you like.
Price is $.74/Ah. This is negotiated for big batch order.
Xinchi has also now 3000mAh in mass production and also 3400mAh under test.
Xinchi has also professional R&D dep. for battery packs(for ecycles, electronics, etc) assembly.
Most importantly, All of Xinchi’s 18650 cells use USA imported ceramic material which is the most safe cell separator.
I saw the engineer used a hammer to knock the battery cell heavily. They battery cell became deformed. But when they put the deformed battery cell into test device. The cell could still be charged and discharged normally! I am totally shocked at that time.