Yesterday, I decided to do some crazy experiment: after good results from the fairly cheap Ultrafire 17500s regarding the capacity they have, I decided to have a brutal test for the protection-PCB: I loaded two of them in a C3 Centurion, and put in a P91, drawing about 2.7 Amps.... and guess what??
Upon the first tap of the switch, it came on immediately, and an immense wall of light emerged... never saw that P91 SOOO bright :twothumbs
Worst what can happen, is that it switches off, because the batteries have a "short-circuit and over-current protection" as I can read, including a re-and discharging protection. This way, the battery and the PCB cannot be damaged, as even a short can't hurt it :thumbsup:
Of course, I immediately removed that P91 and put in the P90 again. This is way too much for a set of 17500s, yes, I know!
But it's nice to know, that these batteries do actually have some power to boot
A Lumens Factory EO-9 will be no problem at all. With a MEASURED capacity of over 1000mAh a 2A load will be OK :thumbsup:
Before I had any understanding of these Li-ion batteries, I bought a WF-501B with the batteries and charger that, according to the seller, "belonged to it".
The batteries were the Ultrafire 880mAh protected RCR123s.... with a true capacity of about 500mAh.... in the best case. This means, better stay under 1A discharge current. And... what did that lamp draw?? 1.3 Amps... no wonder, that in 20 minutes the batteries were empty. I ran them into their protection numerous times, and charged them with this cheap charger...
It's quite a miracle nothing bad has happened! First remarkable thing is, that these batteries fire up such a lamp every time, in the first click. Second.... that they survived all my mistreatments! They still are OK, hold well over 4V when rested for a longer period of time.
Maybe Ultrafire batteries have become better than earlier ones? If they now state the TRUE capacity on them, then I would be quite happy with them...
Timmo.
Timmo.
Upon the first tap of the switch, it came on immediately, and an immense wall of light emerged... never saw that P91 SOOO bright :twothumbs
Worst what can happen, is that it switches off, because the batteries have a "short-circuit and over-current protection" as I can read, including a re-and discharging protection. This way, the battery and the PCB cannot be damaged, as even a short can't hurt it :thumbsup:
Of course, I immediately removed that P91 and put in the P90 again. This is way too much for a set of 17500s, yes, I know!
But it's nice to know, that these batteries do actually have some power to boot
A Lumens Factory EO-9 will be no problem at all. With a MEASURED capacity of over 1000mAh a 2A load will be OK :thumbsup:
Before I had any understanding of these Li-ion batteries, I bought a WF-501B with the batteries and charger that, according to the seller, "belonged to it".
The batteries were the Ultrafire 880mAh protected RCR123s.... with a true capacity of about 500mAh.... in the best case. This means, better stay under 1A discharge current. And... what did that lamp draw?? 1.3 Amps... no wonder, that in 20 minutes the batteries were empty. I ran them into their protection numerous times, and charged them with this cheap charger...
It's quite a miracle nothing bad has happened! First remarkable thing is, that these batteries fire up such a lamp every time, in the first click. Second.... that they survived all my mistreatments! They still are OK, hold well over 4V when rested for a longer period of time.
Maybe Ultrafire batteries have become better than earlier ones? If they now state the TRUE capacity on them, then I would be quite happy with them...
Timmo.
Timmo.
