How can I compare the discharge rate graphs of lg m50 and samsung e50? I would like to see how the curves go. Which one suits better to low-amp use (0-5 amps) like in flashlight. Anyway really appreciate your work.
What is typically an acceptable range of tested vs stated capacity ? For example: If the data sheet states 5000 mAh, yet testing shows 4750 mAh, which is 95% of the stated capacity. Is that ok ? 4750/5000=.95
A good question. Usually capacity of a unused cell at 0.2C discharge is about 50mAh higher than rated. For example a 2500mAh cell shows something like 2543mAh. But it's not a rule, it's just the most common thing which happens. P.S. Bear in mind that nominal capacity should be measured at 0.2C discharge at ~23°C after charging at std charge current and leaving for 1hr minimum before discharging (according to IEC61960 standard).
I really enjoyed the test. I'm going to make a 15S1P package and another 15S2P package for an electric bike. I never use both packages in parallel. Either I use the 1P package or I use the 2P package. The maximum current is 10A but most of the time the current is about 4A. For both packages I am thinking of using the LG M50T. In this environment is it better to use LG in both packages, or is the Samsung 50E better? Thanks
Not sure if I got a defective battery, or if one of my Xtar PB2S is the culprit, but I seem to get what seems like excessive power loss when not in use. Any ideas?
Hi! I am planning to replace the battery (rated@6000mAh) of my 20watt JBL Charge 3 speaker with two of these. Wull there be any problems I should be aware of? Btw, two 18650 cells can fit inside of the said speaker. Thanks!
Charge current is the current you apply to charge a battery. The higher it is the faster the cell is being charged. Standard charge current is defined for each type of battery by its manufacturer. It's the optimal current. The manufacturer also defines maximum charge current which is applicable but reduces battery's life (sometimes significantly).
@@ThunderheartReviews I understand the charge cycles on the datasheet and I also understand the charge rate vrs battery life,I never charge any od my lithium batts over 1 amp mostly.5 but I dont understand why the charge rate would make a difference on the batteries performance.
It makes difference in charging time and cycle life. During charging (and discharging) there are chemical processes going in the battery and the higher is the current - the faster the battery loses its capacity.
Do you think this battery is capable of continuously discharging at 4 amps when the voltage drops to 2.55 volts with an ambient temperature of -20 °C ? (I am sorry, I know this is oddly specific, but it gets cold in Canadian winter so😂)
Samsung 50E's datasheet says it can be discharged at -20 to 60°C range but its capacity at -10°C would be 60% of initial value. So i conclude that it can do at -20°C but with highly reduced capacity.
@@ThunderheartReviews Thanks, but I think they no longer stock any 21700 cells in their AE store, not many genuine sellers do anymore. I found only one seller listing 50E's at a good price, but I cannot tell if they are genuine or new A grade stock. likely not. Cheers.
Very nice video, and wanted to give it a like, but at 4:04 Mr. Thunderheart Reviews appeals for subscribing. Man, did you even try to subscribe on EVERY Chanel, every video in youtube when the author told you to subscribe? After about one year you will get over 17 000 notifications DAILY! Do you want to be 17 001? Hasta la vista. (BTW: very nice video, very professional done and shows honest results).
0:39 - Testing equipment and conditions
1:49 - Battery supplier
2:13 - Samsung INR21700-50E specs and capacity test
3:43 - Verdict
Omg I've been talking about building a battery clamp for years and here you are with a complete one :) awesome video thanks
I'm in constant research of better design of battery holder:) You can track its improvement from version to version in my videos.
How can I compare the discharge rate graphs of lg m50 and samsung e50? I would like to see how the curves go. Which one suits better to low-amp use (0-5 amps) like in flashlight. Anyway really appreciate your work.
What is typically an acceptable range of tested vs stated capacity ?
For example:
If the data sheet states 5000 mAh, yet testing shows 4750 mAh, which is 95% of the stated capacity. Is that ok ?
4750/5000=.95
A good question. Usually capacity of a unused cell at 0.2C discharge is about 50mAh higher than rated. For example a 2500mAh cell shows something like 2543mAh. But it's not a rule, it's just the most common thing which happens.
P.S. Bear in mind that nominal capacity should be measured at 0.2C discharge at ~23°C after charging at std charge current and leaving for 1hr minimum before discharging (according to IEC61960 standard).
I really enjoyed the test.
I'm going to make a 15S1P package and another 15S2P package for an electric bike.
I never use both packages in parallel. Either I use the 1P package or I use the 2P package.
The maximum current is 10A but most of the time the current is about 4A.
For both packages I am thinking of using the LG M50T.
In this environment is it better to use LG in both packages, or is the Samsung 50E better?
Thanks
I was wrong. I will put this question on the LG M50T. Excuse me.
50E
@@ThunderheartReviews thanks
And if I have only 15S2P? Do I have more capacity with LG M50T? My seller will only have 50E in 6 weeks. regards
I've tested both cells so you can compare them. 50E is better than M50T in any equal configuration.
Is Samsung NCR21700 50E is compatible in Convoy s21a flashlight?
Who is better Samsung 40t or 50e for Flashlight?
Thanks
high drain for flaslight
Samsung 40T
what is price
So then who actually makes a 21700 5000mAh battery?
liitokala/shocki.
good show TU
Not sure if I got a defective battery, or if one of my Xtar PB2S is the culprit, but I seem to get what seems like excessive power loss when not in use. Any ideas?
Hi! I am planning to replace the battery (rated@6000mAh) of my 20watt JBL Charge 3 speaker with two of these. Wull there be any problems I should be aware of? Btw, two 18650 cells can fit inside of the said speaker. Thanks!
so how did you do? I think the 21700 cell doesnt fit in there if only two 18650 fit in
WoW..This is exactly the same as the 48G...
Not exactly. Compare std charge current - 1.44A vs 2.45A
@@ThunderheartReviews Can you explain charge current?
Charge current is the current you apply to charge a battery. The higher it is the faster the cell is being charged. Standard charge current is defined for each type of battery by its manufacturer. It's the optimal current. The manufacturer also defines maximum charge current which is applicable but reduces battery's life (sometimes significantly).
@@ThunderheartReviews I understand the charge cycles on the datasheet and I also understand the charge rate vrs battery life,I never charge any od my lithium batts over 1 amp mostly.5 but I dont understand why the charge rate would make a difference on the batteries performance.
It makes difference in charging time and cycle life. During charging (and discharging) there are chemical processes going in the battery and the higher is the current - the faster the battery loses its capacity.
so Samsung 40T 21700 is a much better choice then
Do you think this battery is capable of continuously discharging at 4 amps when the voltage drops to 2.55 volts with an ambient temperature of -20 °C ? (I am sorry, I know this is oddly specific, but it gets cold in Canadian winter so😂)
Samsung 50E's datasheet says it can be discharged at -20 to 60°C range but its capacity at -10°C would be 60% of initial value. So i conclude that it can do at -20°C but with highly reduced capacity.
LG M50 21700 5000mAh 7.3A Battery
QB would be great if they had minimum order quantities less than 140 cells..
Not really applicable for the average consumer.
If I'm not mistaken they sell small quantities via their AliExpress shop but the price is higher compared to direct order.
@@ThunderheartReviews Thanks, but I think they no longer stock any 21700 cells in their AE store, not many genuine sellers do anymore. I found only one seller listing 50E's at a good price, but I cannot tell if they are genuine or new A grade stock. likely not.
Cheers.
Discharge current 9.8A only ? No , thanks .
You're free to choose a cell according to your needs. I test them to make easier to choose.
@@ThunderheartReviews What about putting batteries in parallel to increase the amount of current capacity that can be achieved?
Very nice video, and wanted to give it a like, but at 4:04 Mr. Thunderheart Reviews appeals for subscribing. Man, did you even try to subscribe on EVERY Chanel, every video in youtube when the author told you to subscribe? After about one year you will get over 17 000 notifications DAILY! Do you want to be 17 001? Hasta la vista. (BTW: very nice video, very professional done and shows honest results).
Hi Darko! You made me smile:) To tell the truth, i have to agree with you:)
P.S. Thanks for appreciation!
Can i use this battery for vaping
You better look at Samsung 40T: ua-cam.com/video/lxgKWiQ9580/v-deo.html
Low wattage mtl vaping i guess