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Pros: Great batteries, exact capacity, good quality.
Cons: Really no cons here. Maybe i couldn't find battery holder for this baby, and there is no balancer charger in stock.
Other Thoughts: Protection circuit works well. I had 70 k ohm resistor accidentaly conected, that it leaked current(0.5 micro amperes) in oposite polarity on other cell in series. But the protection circuit kicked in and it prevent damage(if any). It simply disconects the cell.
Bottomline: The voltage of full charge and cut-off discharge is 4.2V and 2.75VDon't heat, incinerate or reverse polarityEnvironment friendlyThe voltage of full charge and cut-off discharge is 4.2V and 2.75VDon't heat, incinerate or reverse polarityEnvironment friendlyThe voltage of full charge and cut-off discharge is 4.2V and 2.75VDon't heat, incinerate or reverse polarityEnvironment friendly
Pros: Cheap Li-Ion batteries, good quality,true capacity 2420mAh @ 2,75V discharge voltage,capable of high discharge currents.
Cons: None
Other Thoughts: Because they are unprotected, you must be careful not to overcharge or overdischarge them. I don´t think this is a con, because a protected version of this batteries is also available.
Bottomline: I used them to construct an external notebook battery, but they are also well suited for replacement of old notebook batteries. The connection of the several batteries is slightly difficult because you can´t solder them.
Pros: - Exact capasity (2496mAh)- Can delivery 4.8A, without significantly droping voltage.
Cons: - none, so far.500 char limit / 500 char limit / 500 char limit / 500 char limit / 500 char limit / 500 char limit / 500 char limit / 500 char limit / 500 char limit / 500 char limit / 500 char limit / 500 char limit / 500 char limit / 500 char limit / 500 char limit / v500 char limit / 500 char limit / 500 char limit / 500 char limit / 500 char limit
Other Thoughts:
Bottomline: - I did discharge cell to 2.75v at 0.1A.- After that i did charge cell at 1.0A.- At constant 4.8A discharge cell temp was about 44C.
Pros: Good price, they look pretty solid, good weigth. Charged to 4.18V, these last long in my WF-502B cree flashlight. Capacity should be something between 2000 and 2400mAh.
Cons: They're unprotected, but I bought these to be sure they'll enter in my flashlight, so there is no big problem.
Other Thoughts: Cheap high capacity cells. at a mere 3.2€ each, they're the cheapest way to power up a flashlight. 3 AAA's would cost more, and last less. Best power density for it's size.
Bottomline: If you need some good cells to power up your ultrafire flashlight, these are ok. Just don't discharge them too much since they arent't protected, and you'll get a good life from these. reccomended.
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