I am new to this forum, so sorry in advance if some of the questions will be silly.
I got my self Convoy S2 plus SST4o flashlight. I am using recovered batteries Sony US18650GR 2100mah, Two new sony ncr18650b (from aliexpress so they probably not genuine) and some aliexpress trustfire batteries.
The issue I have is that in the spec it says flashlight can draw up to 5 amps. If i measure from tail cap I only get up to 3.4 - 3.2A. And after 15 - 20 mins it goes down to 1.5 A and flashlight start blinking (1s on 1s off). This is an issue with my batteries or is it flashlight itself?
I tried to stack 3 batteries together and I got 6.2A draw. So that says flashlight is ok. another problem flashlight is switching on and of every 2 seconds or so. But when I put in this new NCR18650B battery which is from aliexpress is not blinking, but the current draw is only 3.2A. Can somebody recommend where and what model battery to get for this flashlight? I live in Republic of Ireland.
Also, these cells are not for high drain flashlights, specially if they are protected (I can’t tell by the photo you presented).
If the flashlight wants to draw more current, the protection may interfere with that.
The way you’re measuring is adding loads of resistance to the circuit and will certainly affect the current draw. You need a clamp meter to get an accurate reading.
Panasonic 18650GA (genuine ones) are really good for under 10A draw. They’re all I use for my low (5A to 7A) demand lights. Cheap cells or counterfeit ones will have high internal resistance and won’t allow maximum current. To get the best measurement for current, you need a clamp meter. Even a high end multimeter has too much resistance for an accurate measurwment.
Send NKON an email and ask them if/when the NCR18650GA will be in stock again.
He is used to sell large quantities, and reports “out of stock” below a certain volume
Tell him also how many you need, maybe he’s got just enough for your needs.
I have no negative information (eg. no info at all) about batterrijservice.nl but they sell all kinds of batteries, including cells that fit into flashlights.
NKON focusses on flashlight(cell)s, and is my seller of choice. From way before I joined BLF.
Using the Uni-T UT210E and a short piece of copper wire (maybe 1mm thick) to measure the tailcap current, I got around 4.5Amps max for the Convoy S2+ SST40.
This is a bit lower than the other SST40 4-mode drivers, which I measure tailcap current at around 5.5Amps (eg. C8+ SST40 4-mode, or S21A SST40 4-mode driver).
3.x Amps seems to be too low — may I ask how did you do your measurements? Also the batteries used?
I done little upgrade. I put 1.5mm diameter wire inside springs in both side. Now I am getting 3.4 amps instead of 3.
Another thing what i done is thermal paste on the head and tube thread. That was terrible idea… Paste is not conducive. I had to clean it everything and new grease on threads. Do do it.