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Samsung INR21700-33J 3270mAh - 6.4A

Additional Information

EAN / GTIN  7417940526782
Weight - g  63
Brand  Samsung
Model  INR21700-33J
Size  21700
Battery chemistry  Li-ion
Voltage  3.6V
Min. capacity - mAh 3,220.00
Typ. capacity - mAh 3,270.00
Battery version  Flat top
Discharge current - A 6.40
Circuit protection  Unprotected
Height - mm 70.15
Diameter - mm 21.10

Availability: In stock

€1.19 (€ 0,98 without VAT)
  • Buy 50 times for €1.15 (€0.95 without VAT)   
  • Buy 130 times for €1.09 (€0.9 without VAT)   
  • Buy 390 times for €1.04 (€0.86 without VAT)   

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Capacity: 3270mAh
Rated Voltage 3.6V - 3.7V
Charging cycle termination voltage 4.10V
max discharge current: 6.4A
Do not discharge deeper than 3V
Plus pool: Flat top
Chemistry: Li-ion
Protection circuit: Without
Diameter: 21.1mm
Height: 70.15mm
Weight: 62.8g

Additional Information




Customer Reviews

very good battery for the price Review by sid
spotwelded 150 pieces. using aliexpress welder -much faster than home made welder from car battery doing 20 welding spots on each side of the battery as nickel strip is not holding as good as on normal battery.

satisfied (Posted on 13-06-23)
for the price they are good Review by sid
testec capacity 1 cell 2800mAH second 3300mAh

ordered 130 pieces.

spotwelded 20 yet. i have aliexpres spotwelder connected to car battery and just touching + pole on the battery with wire.
nickel strips holds but can be easily removed. but for stationary use it is ok. i am welding 8 dots to each pole of the battery to be sure it holds.

i was unable to solder a wire directly to the top of the battery.
satisfied for the price (Posted on 22-05-23)
perfect for powerbank. Review by roger
ordered a couple of powerbank cases from china for 8 21700 cells, a case is between 8 and 15 euros.
put 8 of these in them and works perfectly.

real 25k powerbank that can do 12v as well for under 25 euros that actually has cells in it that i know are new and from a reputable brand, and not some crappy chinese ones.

can't beat that i think.

when removing the tags sometimes it leaves little high points from the welding, but these are easilly removed.

very happy (Posted on 06-01-23)
It is possible! Review by Tabasco
Just like Artjom, I wanted to try if spotwelding is possible on these cells for decent battery storage. Can't wait till we begin to see the LFP batteries outside... In the meantime, I wanted to limit the money flow towards... and go with this NCM cell.

It is possible to spot-weld these batteries enough for a fixed battery storage if you have a decent spotwelder and play a little with setup. They do not hold if if pull very hard, but good enough for my use at least.

I used 0.15mm pure nickel(I think). (Posted on 07-10-22)
Best bang for your buck Review by BarNiy
They can be spot welded using 0.1mm nickel plated steel. I'm using a "Schmidt-Instrumente UIP-1000" with 1.3 ms / 500 W ~ for the positive aluminium capped side and 0.4 ms / 250 W for the negative side. (Posted on 02-07-22)
soldering possible? Review by df
now if welding does not work, will solder stick mayhemP

It's only possible to laser point weld it

NKON-Team (Posted on 11-07-21)
you really cannot spot weld this Review by Artjom
I could not believe the previous review. So I tried it out. I have experience in spot welding. This one did not work. Negative on the cell is holding with 100Joule, no problem. But the positive on the cell just crumbles down on the contact points. Never seen a cell like this. (Posted on 16-05-21)
BEWARE! Not for spotwelding Review by the Battery Doctor
Capacity test at 500-2000ma shows 3300-3400mah. However these cells are not for spotwelding and does most likely not have an internal fuse system. The top cap is solid and most likelly only for wirebounding machines, Regular nickel will just not stick to it. BEWARE! (Posted on 23-04-21)

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Take care

  • Li-ion batteries can be dangerous when used wrong, short circuit or wrong usage can lead to fire or an explosion
  • Do not put the battery in a charger or equipment with wrong terminals connected
  • Never short cut the battery. Take care you don’t short cut it accidentally, do not put it in your pocked together with bunch of keys
  • Do not disassemble or deform the battery. Dispose it if the battery is deformed
  • Do not immerse in water
  • Avoid excessive physical shock or vibration
  • Do not expose to, dispose of the battery in fire
  • Keep out of the reach of children
  • Never use a modified or damaged charger
  • Do not leave battery in charger over 12 hours
  • Store the battery in a cool, dry and well-ventilated area
  • Dispose of in accordance with local regulations
  • Do not solder on these cells