Lishen 21700 3000mAh LR2170HP

8 posts / 0 new
Last post
TimMc
TimMc's picture
Online
Last seen: 1 min 32 sec ago
Joined: 06/26/2020 - 02:22
Posts: 725
Location: Melbourne, Australia
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:
https://imgur.com/a/A3n2bXm

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…

Edited by: TimMc on 09/21/2022 - 04:46
Funtastic
Funtastic's picture
Offline
Last seen: 5 hours 56 min ago
Joined: 06/26/2014 - 02:14
Posts: 2786
Location: New Zealand

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

Piercing The Darkness YouTube channel – https://www.youtube.com/c/PiercingTheDarkness

Hoop
Hoop's picture
Offline
Last seen: 13 hours 18 sec ago
Joined: 12/20/2012 - 05:33
Posts: 1219
Location: Spokane, WA

Funtastic wrote:
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.
Funtastic
Funtastic's picture
Offline
Last seen: 5 hours 56 min ago
Joined: 06/26/2014 - 02:14
Posts: 2786
Location: New Zealand

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

Piercing The Darkness YouTube channel – https://www.youtube.com/c/PiercingTheDarkness

Hoop
Hoop's picture
Offline
Last seen: 13 hours 18 sec ago
Joined: 12/20/2012 - 05:33
Posts: 1219
Location: Spokane, WA

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

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. With a boost driver, the load on the cells will be greater than the current going to the LED.

BlueSwordM
BlueSwordM's picture
Offline
Last seen: 1 day 3 hours ago
Joined: 11/29/2017 - 12:34
Posts: 6511
Location: Canada

@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.

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

Sirstinky
Offline
Last seen: 1 day 1 hour ago
Joined: 11/02/2018 - 17:07
Posts: 1687
Location: Vancouver, WA

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.

vapcell Dennis
vapcell Dennis's picture
Offline
Last seen: 2 days 16 hours ago
Joined: 09/14/2018 - 04:31
Posts: 467
Location: China

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