I don't notice any difference. They both look and function exactly the same.I wonder if there is any visual difference between the LiIon capable SC53c N and the Non LiIon model? (if someone was hunting AA/LiIon Zebras in the wild)
thank you ;-)I don't notice any difference. They both look and function exactly the same.
I wish they would officially support li-ion myself, and not sure why they don't anymore.
On the SC53 models it's a boost converter for the Alkaline and Eneloop batteries. Your gonna loose some efficiency getting the 1.2 to around 3v.
Using the Lith-Ion the SC53 light has no Buck Convertor but uses a linear regulator-resistor design to lower 4v down which your going to loose some efficiency on too.
thefreeman about SC53 driver:
Uses the LTC3539-2, a synchronous boost converter with integrated switches and low start-up voltage (0.7V), 2MHz switching frequency.
~5x5x4.5mm ferrite core inductor.
I checked several times the measurements for a mistake but in the end the efficiency appears to be just… not great.
Though given the high resistance of the integrated FETs it's not that surprising, ~90mΩ for the low side NFET and ~180mΩ for the high side PFET.
Decent thread on reddit that explains why 14500 Lith-Ion can be used.
SC53 with 14500
Driver Link for 53 lights: Why the SC53 can use Li-ion
PDF of actual driver LTC3539-2 used in these lights.
When Zebra upgraded from the SC52 to the SC53 etc. models they needed memory room in the Firmware to add the G6 & G7 programed levels. On the 53 models they removed from the Firmware the battery chemistry detection feature that was on the 52 models... Hence the capacitor glitch when changing chemistries. (easily remedied by pressing the button to discharge the capacitor before changing battery chemistries.)
Some mixed results for your consideration.
Don't have an H53 on hand to try it with a 14500, tried a 14500 in the SC53c (should be same driver) and it performed similar to my SC52 and SC52 L2. High was definitely brighter running a 14500 than running with either an NIMH or a 1.5v lithium primary.
Did not fry the driver, but the SC53c acted a little odd at first when I removed the 14500 and went back to an Energizer ultimate lithium (1.5v). Would come on, but then cycle H-M-L and then shut off. Did that four times. At that point, I removed and reinstalled the (1.5v) battery and it started working normally. As I have more curiosity than sense, I reinstalled the 14500 and the light worked just like the first time with high significantly brighter than running on the energizer lithium primary (1.5v). This time when I removed the 14500 and went back to the energizer lithium primary (1.5v), I did not have any odd behavior (initially or otherwise). Light seems to be working fine, but if something changes, will post about it.
As I am satisfied with the output at 1.2-1.5v, don't plan to tempt fate and try it again.
|M1 % efficiency
|Zebra SC64c LE
|Zebra H600 IV
It seems the issue is that people want a Zebra that runs on 14500, and that is no longer an option.
imho the 18650 model is a great option if an AA model is not sufficiently bright.
For better or worse, I have to second this. The AA (esp N) is really not that bright, and the small 18650 model is really small. Running 14500 has been "overclocking" for quite a while, now. I'm doing it with one of my Ns but just because, hey, it's a hobby, I wanna have fun.