Test / Review: Efest IMR10440 V1 350mAh (Black)

24 posts / 0 new
Log in or register to post comments
Last post
Tue, 12/18/2012 - 13:06
#1
HKJ
HKJ's picture
Offline
Last seen: 2 weeks 5 days ago
Joined: 05/24/2011 - 12:23
Posts: 7454
Location: Copenhagen, Denmark
Test / Review: Efest IMR10440 V1 350mAh (Black)

Efest IMR10440 V1 350mAh (Black)


DSC_0557

Official specifications:

  • Brand /model: Efest IMR 10440 350mAh 3.7V
  • spec: LiMn 10440 350mAh 3.7V
  • Material: IMR(LiMn)


Efest%20IMR10440%20V1%20350mAh%20(Black)-info

Internal resistance is calculated from 1A to 2A.

DSC_0513 DSC_0556

I got a pile of batteries in one envelope, not the best way to ship batteries, even when they are shrink wrapped. Efest have changed their packing.

DSC_0558 DSC_0559

DSC_0560
DSC_0561

Efest%20IMR10440%20V1%20350mAh%20(Black)-Capacity

1A is handled very well, but even 3A is possible with these IMR cells.

Efest%20IMR10440%20V1%20350mAh%20(Black)-CapacityTimeHours

Efest%20IMR10440%20V1%20350mAh%20(Black)-CapacityTime

Efest%20IMR10440%20V1%20350mAh%20(Black)-Energy

Efest%20IMR10440%20V1%20350mAh%20(Black)-PowerLoadTime

Efest%20IMR10440%20V1%20350mAh%20(Black)-TripCurrent

Thse IMR batteries handles a high load for their size.

Efest%20IMR10440%20V1%20350mAh%20(Black)-Charge



Conclusion

These IMR batteries have very good performance at high loads, but the capacity is, of course, not that high.
At the current time I can only rate them acceptable, because Efest is a new company, and the batteries is not from one of the big brands.



Notes and links

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
Comparison to other LiIon batteries

—

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

Edited by: sb56637 on 08/26/2014 - 17:45
Top
Tue, 12/18/2012 - 13:25
Rufusbduck
Rufusbduck's picture
Offline
Last seen: 1 month 4 weeks ago
Joined: 04/04/2012 - 15:34
Posts: 10401
Location: Golden state

Thanks for the test. I have a pair of these waiting for light(s) in which to use them.

—

Three Tanna leaves to give him life, nine to give him movement. But what if he eats the whole bag?

Scott

Top
Tue, 12/18/2012 - 16:13
kreisler
kreisler's picture
Offline
Last seen: 8 years 6 months ago
Joined: 11/12/2011 - 23:32
Posts: 3992
Location: Deutcheland

Thanks for the review!!

I like 10440's Smile

—
*FMI* i got 4 i/o sh
Top
Tue, 12/18/2012 - 16:15
scaru
scaru's picture
Offline
Last seen: 5 years 6 months ago
Joined: 03/22/2012 - 13:36
Posts: 6946
Location: Virginia

Any chance of 5 amp loads?

—

My LED comparison thread with links. 

Tint, Binning, and CRI Explanation (For the XM-L)

http://budgetlightforum.com/node

Top
Tue, 12/18/2012 - 16:44
HKJ
HKJ's picture
Offline
Last seen: 2 weeks 5 days ago
Joined: 05/24/2011 - 12:23
Posts: 7454
Location: Copenhagen, Denmark

scaru wrote:
Any chance of 5 amp loads?

I do not believe there is any point in a 5A test, look at the difference between 2A and 3A, the difference between 3A and 5A is going to be larger.

—

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

Top
Tue, 12/18/2012 - 17:09
scaru
scaru's picture
Offline
Last seen: 5 years 6 months ago
Joined: 03/22/2012 - 13:36
Posts: 6946
Location: Virginia

HKJ, do you have any suggestions for a IMR battery (18650) that could supply 20+ amps and still have enough of a voltage to power an XM-L?

—

My LED comparison thread with links. 

Tint, Binning, and CRI Explanation (For the XM-L)

http://budgetlightforum.com/node

Top
Tue, 12/18/2012 - 17:14
NightCrawl
Offline
Last seen: 6 years 3 months ago
Joined: 01/22/2012 - 08:20
Posts: 3071
Location: Karlsruhe, Germany

lol scaru, you are cheap! I ordered 5 different IMRs (2pc of each) to get them tested. Silly

Top
Tue, 12/18/2012 - 17:15
HKJ
HKJ's picture
Offline
Last seen: 2 weeks 5 days ago
Joined: 05/24/2011 - 12:23
Posts: 7454
Location: Copenhagen, Denmark

scaru wrote:

HKJ, do you have any suggestions for a IMR battery (18650) that could supply 20+ amps and still have enough of a voltage to power an XM-L?

 

The only 18650 I have tested at 20A is the AW IMR 18650 (Except A123, but they are lower in voltage).

—

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

Top
Tue, 12/18/2012 - 17:16
scaru
scaru's picture
Offline
Last seen: 5 years 6 months ago
Joined: 03/22/2012 - 13:36
Posts: 6946
Location: Virginia

NightCrawl wrote:

lol scaru, you are cheap! I ordered 5 different IMRs (2pc of each) to get them tested. Silly

Well, when I am already paying for 7 XM-Ls I need to save some money. Wink And you don't need that much power, you only need 12 amps. Wink

—

My LED comparison thread with links. 

Tint, Binning, and CRI Explanation (For the XM-L)

http://budgetlightforum.com/node

Top
Tue, 12/18/2012 - 17:27
HKJ
HKJ's picture
Offline
Last seen: 2 weeks 5 days ago
Joined: 05/24/2011 - 12:23
Posts: 7454
Location: Copenhagen, Denmark

scaru wrote:

Well, when I am already paying for 7 XM-Ls I need to save some money. Wink And you don't need that much power, you only need 12 amps. ;)

 

For 10A you can use this chart:

And then also check my protection test that goes to 15A.

I am going to add some Efest IMR cells to the chart soon.

—

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

Top
Tue, 12/18/2012 - 17:35
NightCrawl
Offline
Last seen: 6 years 3 months ago
Joined: 01/22/2012 - 08:20
Posts: 3071
Location: Karlsruhe, Germany

scaru wrote:

NightCrawl wrote:

lol scaru, you are cheap! I ordered 5 different IMRs (2pc of each) to get them tested. Silly

Well, when I am already paying for 7 XM-Ls I need to save some money. Wink And you don't need that much power, you only need 12 amps. Wink

You know nothing about my needs! Big Smile

Top
Tue, 12/18/2012 - 17:41
scaru
scaru's picture
Offline
Last seen: 5 years 6 months ago
Joined: 03/22/2012 - 13:36
Posts: 6946
Location: Virginia

NightCrawl wrote:

scaru wrote:

NightCrawl wrote:

lol scaru, you are cheap! I ordered 5 different IMRs (2pc of each) to get them tested. Silly

Well, when I am already paying for 7 XM-Ls I need to save some money. Wink And you don't need that much power, you only need 12 amps. Wink

You know nothing about my needs! Big Smile

Triple MTG-2? Evil

—

My LED comparison thread with links. 

Tint, Binning, and CRI Explanation (For the XM-L)

http://budgetlightforum.com/node

Top
Tue, 12/18/2012 - 18:05
NightCrawl
Offline
Last seen: 6 years 3 months ago
Joined: 01/22/2012 - 08:20
Posts: 3071
Location: Karlsruhe, Germany

Great idea, but I want my lights to be useful. I'm no multicell guy.. did I say useful? Big Smile

Top
Tue, 12/18/2012 - 22:35
texaspyro
Offline
Last seen: 3 years 3 days ago
Joined: 04/29/2011 - 12:43
Posts: 4593
scaru wrote:
Well, when I am already paying for 7 XM-Ls I need to save some money.

Do it right… dump’em and use XML2’s…

Top
Mon, 01/28/2013 - 11:26
sb56637
sb56637's picture
Offline
Last seen: 4 hours 18 min ago
Joined: 01/08/2010 - 09:29
Posts: 7190
Location: The Light

Thanks very much! Frontpage’d and Sticky’d.

—

Budget Light Forum ...where Frugal meets with Flashlight!

Top
Sun, 02/02/2014 - 18:12
Helios-
Helios-'s picture
Offline
Last seen: 2 years 7 months ago
Joined: 01/18/2012 - 21:12
Posts: 2099

A few low current chargers for 10440s: XTAR XP1 (250mA), Micro Lipo mcp73831 (100mA / 500mA, default 100mA), LipoNano (100mA / 500mA, default 500mA). Lipo nano / mcp73831 test. You can even connect an AAA battery holder to the micro lipo without soldering (twist & tape).

Modding a $1.50 tp4056 charger board would be the least expensive option. A 5.1k resistor gives 250mA, 10k for 130mA. A through hole resistor works or a 0805 resistor. Original resistor is 0603 but 0805 does fit on the pads. FT $1.56 0805 3.9K-62K Resistor pack 270-Piece

With efest10440 250mA is 0.81C, 150mA is 0.49C. LiMn might be able to tolerate more but don’t want to risk losing any capacity from charging too quick.

—

•
Counterfeit 18650s, 2,<a href=“http://

Top
Mon, 03/17/2014 - 14:34
koyotee
koyotee's picture
Offline
Last seen: 6 months 2 weeks ago
Joined: 11/22/2012 - 11:12
Posts: 1684
Location: Slovenia

So is the 250ma option good for these batteries?

—

Finaly, proud owner of a Powerex Maha mh c-9000 for my Eneloops:)

Top
Mon, 03/17/2014 - 14:39
HKJ
HKJ's picture
Offline
Last seen: 2 weeks 5 days ago
Joined: 05/24/2011 - 12:23
Posts: 7454
Location: Copenhagen, Denmark

koyotee wrote:
So is the 250ma option good for these batteries?

Yes, 250mA charge current is fine for 10440

—

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

Top
Mon, 03/17/2014 - 14:44
koyotee
koyotee's picture
Offline
Last seen: 6 months 2 weeks ago
Joined: 11/22/2012 - 11:12
Posts: 1684
Location: Slovenia

Thanks! Smile

—

Finaly, proud owner of a Powerex Maha mh c-9000 for my Eneloops:)

Top
Mon, 03/17/2014 - 23:58
B25364
B25364's picture
Offline
Last seen: 8 years 3 months ago
Joined: 01/16/2014 - 17:50
Posts: 97

i see that in the protection test, you run the batteries
down to below 2 volts and sometimes below 1.75 volts.

these batteries have no protection circuit.

Is this safe to do with this chemistry.?
can i run these without protection until dead
and then recharge ?

thanks for the great info

Top
Tue, 03/18/2014 - 01:50
HKJ
HKJ's picture
Offline
Last seen: 2 weeks 5 days ago
Joined: 05/24/2011 - 12:23
Posts: 7454
Location: Copenhagen, Denmark

B25364 wrote:
i see that in the protection test, you run the batteries down to below 2 volts and sometimes below 1.75 volts. these batteries have no protection circuit. Is this safe to do with this chemistry.? can i run these without protection until dead and then recharge ? thanks for the great info

I am only below 2 volt for about 2 seconds and then at a high load. The batteries are not discharger below 2 volt.

No, you will damage the batteries if you run them below 2 volt and probably also below 2.5 volt.

—

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

Top
Thu, 06/18/2015 - 07:56
Halo...
Halo...'s picture
Offline
Last seen: 5 years 10 months ago
Joined: 12/15/2011 - 02:39
Posts: 3304
Location: Halo island

200mA is good.

—

xkcd.com/1603      Li-ion battery safety 101.

Top
Thu, 06/18/2015 - 12:40
Halo...
Halo...'s picture
Offline
Last seen: 5 years 10 months ago
Joined: 12/15/2011 - 02:39
Posts: 3304
Location: Halo island

Does the bt-c3100 do pulse charging?

I don’t like pulse personally.

—

xkcd.com/1603      Li-ion battery safety 101.

Top
Thu, 06/18/2015 - 23:36
Rufusbduck
Rufusbduck's picture
Offline
Last seen: 1 month 4 weeks ago
Joined: 04/04/2012 - 15:34
Posts: 10401
Location: Golden state

Xstar MC-0 does ok at 250 mA but it’s not too hard to mod a tp4056 board to even lower charge current.

—

Three Tanna leaves to give him life, nine to give him movement. But what if he eats the whole bag?

Scott

Top