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Регистрация: 03.07.2010 Последняя активность: 10.10.2022 08:53 Адрес: Copenhagen, Denmark
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Test/Review of UltraFire BRC18650 3000mAh (Red-silver)
UltraFire BRC18650 3000mAh (Red-silver)
These batteries are sold from many China shops, I have tested from 3 different shops and there is wide differences and none of the batteries are good. Official specifications:
These batteries are from the UltraFire shop that insists that they sell genuine UltraFire with good quality. The two batteries has a huge difference in capacity, especially at low currents. It does not look like this battery has a over current protection or maybe it is at a higher current than the battery can supply. The A battery failed after one test. UltraFire BRC18650 3000mAh (Red-silver) cnq Official specifications:
This is the most expensive UltraFire 3000mAh than cnq has, these are supposed to genuine UltraFire. The two batteries has a huge difference in capacity, especially at low currents. It does not look like this battery has a over current protection or maybe it is at a higher current than the battery can supply. The A battery failed after one test. UltraFire BRC18650 3000mAh (Red-silver) DX Official specifications:
These UltraFire does not have the same performance as the two other pairs. There is a fairly good match between the batteries. On these UltraFire the protection works. Conclusion The genuine UltraFire batteries are not very good with very different capacity and problems with the protection circuit, the DX version is better (At least the ones I got). None of the batteries are close to the rated capacity. The internal resistance is also way to high for the genuine batteries. I will rate these batteries as BAD, the DX ones are acceptable for a cheap battery, but because there is many different UltraFire 3000mAh on the market, I would not trust them. Notes and links Due to the wide difference between batteries from the same dealer, I have not included them in the charts, but only in the comparator. How is the test done and how to read the charts How is a protected LiIon battery constructed More about button top and flat top batteries
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