Which Batteries Fit My Convoy?

8 posts / 0 new
Last post
drewski
Offline
Last seen: 1 month 4 days ago
Joined: 07/09/2019 - 08:46
Posts: 140
Location: US
Which Batteries Fit My Convoy?

I just purchased my first 21700 light, the Convoy S21B (xhp50.2), but I am not sure which 21700 battery to purchase for it because I’ve read that some rewrapped cells such as Sofirn and Vapcell are too wide and do not fit other similar convoy models.

What is the maximum accepted battery length? Would button top or protected fit?

I was eyeing the Keeppower protected 21700 but I’m worried that may be too long for both the s21b and for my charger. I’m also considering either a 5,000mah Lishen or a Samsung 50E but most places are out of stock on 50e at the moment.

Any suggestions?

BlueSwordM
BlueSwordM's picture
Online
Last seen: 12 min 58 sec ago
Joined: 11/29/2017 - 12:34
Posts: 6515
Location: Canada

My suggestion would actually be the BAK 5000mAh 21700, which is the cell that is included inside of 21700 Convoy lights.

Its performance at higher currents is better than the 5000mAh Lishen(which is important for high current lights like the S21B) and on par with the Samsung 50E3.

If you can afford that, you should definitely pick the BAK 5Ah 21700 over the Lishen one over at 18650Batterystore for example.

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

raccoon city
raccoon city's picture
Offline
Last seen: 1 hour 49 min ago
Joined: 10/06/2010 - 02:35
Posts: 19310
Location: Palm Desert CA ~ West Coast is the best coast

I thought the Lishen worked better at higher currents than the BAK.

NeutralFan
NeutralFan's picture
Offline
Last seen: 1 day 22 hours ago
Joined: 03/20/2014 - 19:22
Posts: 1982
Location: Wisconsin, USA

I suggest and just got the Samsung INR21700-50E 5000mAh battery from MTN a couple weeks ago.

I’d rather use my flashlight around the house than turn on the lights.

Bort
Bort's picture
Offline
Last seen: 58 min 38 sec ago
Joined: 06/01/2012 - 17:15
Posts: 8967
Location: Holding the proverbial flashlight

I have an S21A and it fits Samsung 50E and 50G. It also fits the Wurkkos 21700, though it is a bit tighter interestingly but fits and powers the light no problem.

The Journal of Alternative Facts

"It is critical that there is a credible academic source for the growing and important discipline of Alternative Facts. This field of study will just keep winning, and we knew that all the best people would want to be on board. There is a real risk in the world today that people might be getting their information about science from actual scientists."

 

stephenk
stephenk's picture
Offline
Last seen: 2 hours 40 min ago
Joined: 01/30/2016 - 05:09
Posts: 2283
Location: Australia

Given that light shouldn’t be drawing much more than 6A from the battery (3A 6V driver), I doubt there would be any significant difference in performance between most 5000mAh 21700s.

BlueSwordM
BlueSwordM's picture
Online
Last seen: 12 min 58 sec ago
Joined: 11/29/2017 - 12:34
Posts: 6515
Location: Canada

There’s actually a non-negligible difference between the BAK 21700 and the Lishen 21700.

5% of capacity difference at 5A, which is certainly small, but not negligible, and its higher power capabilities should make it usable in more lights, especially since you have to derate the Lishen one if you want better cycle life.

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

SMOKEU
Offline
Last seen: 1 month 1 week ago
Joined: 03/29/2022 - 04:19
Posts: 39
Location: New Zealand

I haven’t had any issues with any of my Convoy lights with cell thickness. I sometimes write the date of purchase on top of a stock cell wrap and then put a clear wrap over it to protect it (so cell is double wrapped) and never had problems in any of my S2+, S21A, S21D, 3×21A, M3-C etc.