Very nice batteries. First two photos tells all. Discharge values are a bit over 4900mAh while charging values are a bit lower than 4900mAh. Internal resistance is a bit higher, around 20mΩ which is also very acceptable for 15A constant discharging rate. I tested 8 batteries in total and all have similar characteristics which proves consistent quality that came from Astrolux. Not only this batteries look great ( my personal taste ofc ), they also act great and so I am VERY happy with this purchase. Above all the price for this quality is great. If you need high capacity 21700 batteries at low price go for it. Bear in mind I tested on Opus which in its own manual says that tested values of internal resistance should be reduced a bit because of the resistance in the very charger so I assume even the resistance values are very close to the truth! This batteries are really worth of buying and so highly recommended. Thank You Banggood and way to go Astrolux!!!

Very nice batteries. First two photos tells all. Discharge values are a bit over 4900mAh while charging values are a bit lower than 4900mAh. Internal resistance is a bit higher, around 20mΩ which is also very acceptable for 15A constant discharging rate. I tested 8 batteries in total and all have similar characteristics which proves consistent quality that came from Astrolux. Not only this batteries look great ( my personal taste ofc ), they also act great and so I am VERY happy with this purchase. Above all the price for this quality is great. If you need high capacity 21700 batteries at low price go for it. Bear in mind I tested on Opus which in its own manual says that tested values of internal resistance should be reduced a bit because of the resistance in the very charger so I assume even the resistance values are very close to the truth! This batteries are really worth of buying and so highly recommended. Thank You Banggood and way to go Astrolux!!!

Very nice batteries. First two photos tells all. Discharge values are a bit over 4900mAh while charging values are a bit lower than 4900mAh. Internal resistance is a bit higher, around 20mΩ which is also very acceptable for 15A constant discharging rate. I tested 8 batteries in total and all have similar characteristics which proves consistent quality that came from Astrolux. Not only this batteries look great ( my personal taste ofc ), they also act great and so I am VERY happy with this purchase. Above all the price for this quality is great. If you need high capacity 21700 batteries at low price go for it. Bear in mind I tested on Opus which in its own manual says that tested values of internal resistance should be reduced a bit because of the resistance in the very charger so I assume even the resistance values are very close to the truth! This batteries are really worth of buying and so highly recommended. Thank You Banggood and way to go Astrolux!!!

These seem like good cells. I love the white and blue wraps. All 4 cells weighed 74.5g each and each had a shipping voltage of 3.48v. Running a discharge test at .2C (1000mA) all cells came in at around 5000mAh of capacity: 4993, 4994, 5003, and 5038mAh. I forgot to take a photo of the one discharge test, so I took a photo of the finished recharge cycle on my Nitecore UMS2 (5029mAh). They are slightly larger in diameter then some other 21700's, but they still fit my Convoy S12 which has the narrowest battery tube of all my 21700 lights, but there is no room to spare. It took 5 and half weeks to be delivered and they were well packaged and they all had individual plastic cases. Will have to see how they hold up over time, but I doubt that there will be any problems.

These seem like good cells. I love the white and blue wraps. All 4 cells weighed 74.5g each and each had a shipping voltage of 3.48v. Running a discharge test at .2C (1000mA) all cells came in at around 5000mAh of capacity: 4993, 4994, 5003, and 5038mAh. I forgot to take a photo of the one discharge test, so I took a photo of the finished recharge cycle on my Nitecore UMS2 (5029mAh). They are slightly larger in diameter then some other 21700's, but they still fit my Convoy S12 which has the narrowest battery tube of all my 21700 lights, but there is no room to spare. It took 5 and half weeks to be delivered and they were well packaged and they all had individual plastic cases. Will have to see how they hold up over time, but I doubt that there will be any problems.

These seem like good cells. I love the white and blue wraps. All 4 cells weighed 74.5g each and each had a shipping voltage of 3.48v. Running a discharge test at .2C (1000mA) all cells came in at around 5000mAh of capacity: 4993, 4994, 5003, and 5038mAh. I forgot to take a photo of the one discharge test, so I took a photo of the finished recharge cycle on my Nitecore UMS2 (5029mAh). They are slightly larger in diameter then some other 21700's, but they still fit my Convoy S12 which has the narrowest battery tube of all my 21700 lights, but there is no room to spare. It took 5 and half weeks to be delivered and they were well packaged and they all had individual plastic cases. Will have to see how they hold up over time, but I doubt that there will be any problems.