Lishen 21700 3000mAh LR2170HP

Does anyone have a data sheet for the Lishen LR2170HP?

I’m reviewing a Nightwatch NS59v2 and I noticed that it came with two button top LR2170HP cells.

Here are some screenshots of the NS59v2 product page on taobao:

Nightwatch recommend using two LR2170HP cells to handle 60A bursts. I measured 48.3A at the tailcap of an NS59v2 on Turbo using an 8awg wire and UT210E. This flashlight is powerful! But I digress…

Does the LR2170HP handle 60A continuously? Can it handle 48.3A?

There are a few photos in the album of gray LR2170HP cells but some customers have received cells with a pink wrap and blue wrap too. I hope that they’re all rated for 50A continuous…

I thought that the amp load is shared between both cells in series, so 60A / 2 = 30A continuous, not 60A per cell.

The amp load is divided if the cells are in parallel configuration. In series, each cell sees the full load.

Does that always apply, even with buck drivers? What if it’s a 3v led with 2 cells in series?

I’ve had it wrong for years then.

The capacity remains the same, just the voltage is doubled. If multiple cells are used with a 3v LED, how does that work? I guess the driver would be stepping down the voltage, but it would then increase capacity?

I should find a relevant thread

It always applies in the context of battery configurations.

With a buck (or boost) driver, the LED load is not the same as the load on the cells. With a buck driver, the load on the cells will be less than the current going to the LED (s). With a boost driver, the load on the cells will be greater than the current going to the LED (s).

@TimMc the cell can’t likely do 48.2A continously unless under strict parameters.
It can likely only do 35-40A sustainably, like the Samsung 30T.

I don’t think a small li-ion battery exists that can handle 60A for more than a few seconds, and with the Ns59v1 the output starts dropping almost instantly anyway. I measured max 52A on the Ns59v1 for like 2-3 seconds. Those batteries should be fine. The ones that came with my light didn’t get overly hot during the testing.

There is no LISHEN 21700 HP battery in the market, which is compiled by the shop owner

The 3000mah battery should be LR21700LH, 3000mah 35A

The power performance is slightly weaker than 30T

However, there is a more powerful LR21700LB 2000mah, which has not been mass produced. It is said that it is 50A,

The vapcell T20 uses this cell, with little temperature rise

There is another LR21700SG, which has not been mass produced yet, about 3500mah 25A

There are no specifications except LH

I took the Lishen battery that Nealgadgets provides with my Nightwatch Chaos and tested it in my Lumintop D3 and Mateminco PD90S. I don’t know what model it is (it’s pink and has no meaningful numbers or name on the label) but it very clearly and repeatedly gives the highest “Turbo” output when compared vs Samsung 30T and 40T.

For Mateminco ~7400 lm Lishen, ~6700 lm 30T
For Lumintop ~6500 lm Lishen, ~6200 lm 30T

Are all your testing done with fully charged batteries? Are you interested in finding how the batteries perform with half-full battery (say at 3.7V)?

Why? Better to just wait for a review from Mooch and you can compare graphs

The graphs are great, but I don’t think they tell you how much turbo output decreases as you use the battery. The voltage drop at a preset current level is standardized information and is certainly useful for comparing batteries. But I don’t think it’s 100% related to the turbo output. In short, I’m interested in the actual difference in turbo output as the battery gets drained. These information may be different across lights, but I think it will give you a better understanding of how the battery will perform in lights.

It is like comparing standardized bench mark scores vs. real world user experience (how long would it take to export a video for example).

@Limsup, yes of course. Full power. 5 plus runs each. Recharging to full with Opus after each run (of a single Turbo activation) and waiting in between every run for light to cool down, etc.

I’ll let the experts do more complete professional tests. This is just so time consuming and it doesn’t help that I am slightly ocd. :person_facepalming: :slight_smile:

The Lishen has a very obvious and very clear advantage. Capacity seems low though from prelim use (frequent LVP trigger) but I don’t know whether it’s from the Chaos or the battery. I’m testing it with Opus.

I see how your test are done.

But… how many times do you have full battery when you use turbo? I compared Molicel P42A and Samsung 40T, and so far it seems that 40T can output more when full, but P42A performs better as you use the light (when compared at the same voltage e.g. 3.7v)

Nevertheless, thank you for providing the comparison numbers. They are helpful.

Yes, the 40T has less voltage drop on load at the start compared to the P42A