Test/review of Keeppower 18650 3200mAh P1832U (Blue-white) 2020

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HKJ
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Test/review of Keeppower 18650 3200mAh P1832U (Blue-white) 2020

Keeppower 18650 3200mAh P1832U (Blue-white) 2020
DSC_4090
Official specifications:


  • Protected 18650 Li-ion Rechargeable Battery
  • Minimum Capacity: 3100mAh
  • Typical Capacity: 3200mAh
  • Normal Voltage: 3.6V
  • Standard Continuous Charging Current: 750mA (by USB), 1A (by li-ion battery charger)
  • Maximum Continuous Discharging Current: 8.0A
  • In Built Safety Circuitry
  • Protection Circuit (Against over charge, over discharge, over current and short-circuit.)
  • Charge voltage: 4.20V maximum voltage and 2.50V cut-off voltage (by li-ion battery charger), 5.0V (by USB)
  • Over 500 charge-discharge cycles

Keeppower%2018650%203200mAh%20P1832U%20(Blue-white)%202020-info
A fairly high capacity protected 18650 that can be charged from USB.
DSC_4089
DSC_4091 DSC_4092
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The battery box includes a dual USB charge cable.
Keeppower%2018650%203200mAh%20P1832U%20(Blue-white)%202020-Capacity
The two cells tracks very nicely and can also deliver the rated 8A, the protection triggers at about 15A.
Keeppower%2018650%203200mAh%20P1832U%20(Blue-white)%202020-Temp-7.0
Keeppower%2018650%203200mAh%20P1832U%20(Blue-white)%202020-Temp-10.0
Keeppower%2018650%203200mAh%20P1832U%20(Blue-white)%202020-Temp-15.0
Keeppower%2018650%203200mAh%20P1832U%20(Blue-white)%202020-CapacityTimeHours
Keeppower%2018650%203200mAh%20P1832U%20(Blue-white)%202020-CapacityTime
Keeppower%2018650%203200mAh%20P1832U%20(Blue-white)%202020-Energy
Keeppower%2018650%203200mAh%20P1832U%20(Blue-white)%202020-PowerLoadTime
Keeppower%2018650%203200mAh%20P1832U%20(Blue-white)%202020-TripCurrent
Keeppower%2018650%203200mAh%20P1832U%20(Blue-white)%202020-Charge
USB%20Charge%20Test%2020201207030040
Discharge-Keeppower%2018650%203200mAh%20P1832U%20%28Blue-white%29%202020-pulse-1.0%2010%2010-IR
Conclusion
A good protected battery with decent capacity, the USB charging can be useful on the go or if you only have a few 18650 batteries.
Notes and links
The batteries was supplied by Keeppower for review.
How is the test done and how to read the charts
How is a protected LiIon battery constructed
More about button top and flat top batteries
Graphical comparison to 18650 and other batteries
Table with all tested LiIon batteries

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

kennybobby
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Thank you for the great test data, it is an interesting cell with all the protection features plus USB. Nearly an 18700 by the dimensions.

Now i used to think that i was cool,
drivin' around on fossil fuel,
until i saw what i was doin',
was drivin' down the road to ruin. --JT

question465
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Hi!

Does this battery have little holes in it to let overpressure go in the case of an emergency?

HKJ
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question465 wrote:
Hi!

Does this battery have little holes in it to let overpressure go in the case of an emergency?

Not really, it is not the way it works.
The actual cell probably has vent holes into the USB/protection top, it could also be a weak spot designed to blow out.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

question465
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Thank you!

I found this battery test on your website: Lumintop 18650 3400mAh usb (White) LM34C

The battery almost looks like the Keeppower battery, but the Lumintop has vent holes at the plus pole. So, is the Lumintop the better and/or safer battery compared to the Keeppower USB?

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Thanks for all these tests, HKJ.

I’d really have no clue how to choose a battery without them (or I’d have to spend much more time looking at disparate info from different places).

HKJ
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question465 wrote:
Thank you!

I found this battery test on your website: Lumintop 18650 3400mAh usb (White) LM34C

The battery almost looks like the Keeppower battery, but the Lumintop has vent holes at the plus pole. So, is the Lumintop the better and/or safer battery compared to the Keeppower USB?

It is not vent holes, but for leds.
Both batteries has a big vent hole that is used for the USB connector.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

question465
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Hello Smile

I am not referring to the charging/charge complete LEDs, but to the holes that can be seen at the top of the Lumintop battery you tested. The golden positive pole in the middle of the top features two holes. They are used to vent gas and realease pressure, right?

“Both batteries has a big vent hole that is used for the USB connector.” —> I don’t really understand this. Sorry, please help me, I’m a newbie! So, do the vent holes still work, even when you connect a USB cable to the USB connector or will it block the vent hole so that overpressure cannot get out of the battery?

Do you think that the Lumintop battery is safer than the Keeppower?

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question465 wrote:
I am not referring to the charging/charge complete LEDs, but to the holes that can be seen at the top of the Lumintop battery you tested. The golden positive pole in the middle of the top features two holes. They are used to vent gas and realease pressure, right?

No, vent holes on LiIon batteries are not made that way.

I have disassembled some USB charged batteries here: https://lygte-info.dk/info/BatteryDisassembly18650usb%20UK.html

question465 wrote:
“Both batteries has a big vent hole that is used for the USB connector.” —> I don’t really understand this. Sorry, please help me, I’m a newbie! So, do the vent holes still work, even when you connect a USB cable to the USB connector or will it block the vent hole so that overpressure cannot get out of the battery?

The top of the battery is hollow with a electronic circuit inside, any hole into that space can be used as a vent hole.

question465 wrote:
Do you think that the Lumintop battery is safer than the Keeppower?

That depends on the cell inside the battery and I do not know what either brand uses.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

question465
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Hello HKJ!

 

Your help and expertise is very much regarded, so thank you very, very much! Smile

I just received the Keeppower 18650 3200mAh P1832U (Blue-white) today.

On your webpage, you have an interesting article about "The Anatomy of a Protected LiIon Battery": https://lygte-info.dk/info/battery%20protection%20UK.html

 

It states as following: "The wire is connected to the plus pole on the battery and the other end goes to the circuit in the bottom of the battery. The vent holes, from the pressure valve, can also easily be seen here, including two more."

 

I can't see or touch the wire which should connenct the plus pole and the bottom of the battery. Doesn't the Keeppower USB feature such a wire? I have another proceted battery where I can easily touch and feel the wire. And if so, is the protection good enough anyway? I also can't see any vent holes. Like you mentioned before, they might be hidden underneath the cover, right?

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question465 wrote:

It states as following: “The wire is connected to the plus pole on the battery and the other end goes to the circuit in the bottom of the battery. The vent holes, from the pressure valve, can also easily be seen here, including two more.”

That was written when all batteries had protection at the back, with front protected batteries you do not need a wire on side of the battery.
The reason for the wire is that the protection electronic need connection to both + and – on the battery. At the back there is only the – (The can) and need a wire to the front, but at the front the electronic can connect to both + and – without any wires.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

question465
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Thank you very much for your fast reply!

question465
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There are many different versions of the Convoy M21B flashlight. There are different LEDs you can choose from and different amps (3A – 8A I presume).

This version seems to use a maximum of 5A. There is a review of another version of the M21B, featuring a different LED. The review states about 5A for the 100 % mode, 1,5A for the 30 % mode.

The maximum continuous discharging current of the Keeppower battery is declared to be 8A.

Question: Am I right to presume that the battery is powerful enough to work with the Convoy M21B flashlight at every time and mode?

Funtastic
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question465 wrote:
Question: Am I right to presume that the battery is powerful enough to work with the Convoy M21B flashlight at every time and mode?

That battery doesn’t trip the protection until 13-14 amps, so that’s not a problem. If it’s the 8A driver in the Convoy you might want to go for an unprotected 15A+ battery. A battery’s voltage will sag on load and the higher amp battery you use, the less it will sag at 8A.

I use a Samsung 30Q in the C8+ and a Molicel P42A in the M21B

Texas Ace Lumen Tube calibrated with maukka lights

New Zealand store – https://www.piercingthedarkness.co.nz (NZ customers only)

YouTube channel – https://www.youtube.com/channel/UCIUWi2vYp4CWrRkOJM70t_w/videos (Demos for my customers, and reviews)

question465
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Hi!

I have tested the Keeppower 18650 3200mAh P1832U (Blue-white) 2020 in a Convoy M21B (XHP 50.2, 5A maximum output).
On high mode, the battery lasts for about 1 hour and 45 minutes, on turbo it lasts for about 35 minutes.

Here is a review that covers the SST-40 LED version of the M21B: https://zeroair.org/2019/10/30/convoy-m21b-flashlight-review/#Power_and_...

The M21B doesn’t have a low voltage protection, it just starts to blink when the voltage gets too low. I have a question concerning safety issues here. Let’s imagine I would not turn off the flashlight when the low voltage warning starts to blink: is there no problem because the Keeppower battery is protected against over discharge? Would the flashlight just turn off when the battery’s safety will kick in? And what will happen next? Is it safe to charge the battery again and keep using it even after the over discharge protection has been activated?

And finally, here is just another question: a couple of days ago I forgot that I was charging the Keeppower battery via it’s USB-port. Probably it was connected to the charger for about 3 hours after charging has been completed. When I cut off the power plug of the charger, the Keeppower’s blue “charging complete” lamp was still on. Is this a sign of a probable overcharge, despite the battery has a protection against over charging?

Thank you!

HKJ
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question465 wrote:
The M21B doesn’t have a low voltage protection, it just starts to blink when the voltage gets too low. I have a question concerning safety issues here. Let’s imagine I would not turn off the flashlight when the low voltage warning starts to blink: is there no problem because the Keeppower battery is protected against over discharge? Would the flashlight just turn off when the battery’s safety will kick in? And what will happen next? Is it safe to charge the battery again and keep using it even after the over discharge protection has been activated?

Any LiIon battery with build in protection cannot be over discharged in any serious degree and it will be safe to recharge the battery.

question465 wrote:
And finally, here is just another question: a couple of days ago I forgot that I was charging the Keeppower battery via it’s USB-port. Probably it was connected to the charger for about 3 hours after charging has been completed. When I cut off the power plug of the charger, the Keeppower’s blue “charging complete” lamp was still on. Is this a sign of a probable overcharge, despite the battery has a protection against over charging?

That was probably due to the capacitors in the charger and had nothing to do with the battery.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

question465
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Thank you!