Test / Review: Samsung INR18650-20R (also AW dethroned)

No, they are good. Batteryspace doesnt sell crap. Those are high power but not as high power as true IMR cells. I would guess it some mix-chemistry like the CGR18650CH (rated 5C).

Owned…I wish IMRs would come with low voltage protection, just in case.

They don’t make protected IMR’s for a reason, not “just because”.
Protection would cause significant voltage drop at high currents. That’s unacceptable in situations where IMR cells are used.
See e.g. NCR18650B unprotected vs protected, and that’s just 5A:

When I got those 26650’s I was looking at putting a pcb on em, the only thing or the best thing I could find would limit em to 8A, so why bother to buy 18A capable cells in the first place?

Wow, I really had no idea protection circuits involved that magnitude of resistance. Makes sense then. Thanks!

The resistance in protection circuits depends on the trip current. Depending on chip uses they will trip with a voltage loss of 0.05 to 0.3 volt, the designer of the protection PCB then select enough fet transistor to keep the voltage below the trip voltage, until the desired trip current.

I.e. as long as the same IC is used for protection a 5A trip limit will have same voltage drop at 5A, as a 20A trip limit will have at 20A. This is probably also the reason that some protected batteries has a trip point at around 12A, instead of a more correct 5A to 7A value.

Thanks for doing the test :slight_smile: Nice result :slight_smile:

Ooo... I may have to order some of these up, if only there was a place in the US that stocked them. ;)

must follow this up :stuck_out_tongue:

I ran one of the INR’s into a Direct drive XML P60 while measuring the current draw. I measured nearly 10Amps for about 2 seconds and the little wires in the Led melted, along with the inner part of the dome near the wires.

It was honorable death :bigsmile:

:smiley:

Drag racing at it’s finest! I wouldn’t have thought that would happen, cool test. See? This is why as a noob I’m having others mod some lights for me, I know good and well I’d fry things! Thanks for that, sorry she went but, well, wish you’d have had video rolling! :slight_smile:

Yeah, learning myself too. I had the Led mounted on copper, and it pulled 7Amps of a couple of other different 18650’s, so i just couldn’t resist trying the new INR’s that arrived that day :slight_smile:

You gotta love these experiments. Nice.Laughing

That seems to be what I need.
To sad that enerdan don’t sell these as single cell. Perhaps I ask about that.

that the samsung you used? : http://www.ebay.com/itm/Original-Samsung-INR18650-20R-SDI-3-6V-2000mAh-Li-ion-Rechargeable-Battery-/261134798326?pt=US_Rechargeable_Batteries&hash=item3cccd8cdf6

Yes, they are the ones :slight_smile:

the price is good.

Its the 1600mah AW’s <15A discharge. And tested above 15A

Samsungs are great cell, i wish you could buy them new rather then pulling them
or buying pulled cells off Fleebay…I’ll stick with the AW’s…