Vamo simulation. Real world battery test

The guys here http://www.e-cigarette-forum.com/forum/vamo/355592-vamo-battery-thread-16.html were wondering about the performance of the VAMO e-cig with 1 28650 battery or with 2 18350 stacked.

I have some Efest batteries from the last test and awsum140 measured some current consumptions for me.

So we created a "vape" simulation with both batteries, it draws the same power that the Vamo uses during vaping for 5 seconds and rests for 25 seconds. All that to simulate the actions of the user while using it. It's like chain vaping until the battery reaches the 3.3 cut off voltage. (we didn't use the 2.750V cut off since users tend to recharge the batteries at 3.3V)

The 18650 gave us 250 puffs both times. Continuous vaping for 2 hours

The stacked 18350 gave us 477 puffs (?!?) the first time and 479 the second time. Continuous vaping for 4 hours

Seems like using two stacked batteries performs a lot better.

Get the files here:

Efest 18650 525 Vape test

Efest 18350 525 Vape test


Note: the stacked 18350 batteries ran cooler than the 18650 mainly because the mod draws 1.02A at 7W so there was not so much stressing.

Orbtronic PD-18650 2900mAh IMR high drain

Special thank's tto Roland (awsum140) from the states for sending me batteries to test :)

Orbtronic PD-18650

Fenix ARB-L2 18650 2600mAh Discharge test.

Here is an interesting battery. This is not a high drain (IMR or Li-Mn if you prefer) battery but it's protected for over currents and temperature.

The test was performed with a 1A charge current as Fenix recommends but i didn't used  the 3V cut off but the normal 2.75V.

Take a look on the temperature of this unit. On 1.92C (5A) Discharge the battery has reached 60 Celcius and the analyzer paused to let the battery cool down. The protection didn't kick in so i guess it goes further but no need to risk it.

It's a neat battery for flashlights anyway, in most cases you do not need to discharge at higher C ratings.

Here is the file Fenix ARB-L2

Efest IMR 18490V2, 16340V2, 18350V1, 18650V1, 18500V2 test results.

Here are a few more of the efest batteries you might be interested.

You can get the result files here:

Efest IMR16340V2

Efest IMR18350V1

Efest IMR18490V2

Efest IMR18650V1

Efest IMR18500V2

Efest IMR18350V2 1C and 2C Test

Battery performs as it should. Here you can get both files. Efest IMR18350V2 1C and 2C

Sanyo Eneloop (AA) 1900mAh test

Excellent batteries, performed 102.0%!!!!!

Remember anything above 80% is fine but this was amazing.

Usually the first discharge is out of the box and the batteries perform a little lower, after charging with the analyzer during the routine the battery is more refreshed and performs almost full.

Here is the data Eneloop AA

I also have to thank Ms Anita Gross from Eneloop Sales & marketing division who sent me samples of their batteries. Excellent customer service (pretty fast too) and they were happy to answer all my questions.

Sanyo Eneloop (AAA) 750mAh discharge test

Out of the box they gave me 100.5% when discharged the second time. Excellent performance.
Here is the data Eneloop AAA 750mAh

Sanyo Eneloop XX (AA) 2450mAh 1C discharge test

If not the best, probably one of the best batteries on the galaxy.

This battery straight out of the box gave me 91% and then after a charge it gave me 97.9%. I'm pretty sure if cycled one or two times more it will reach 100% or more but i am having the analyzer testing two AAA eneloops right now so i may test later.

Get the test data here Sanyo Eneloop XX (AA)

Panasonic CGR18650CH 2.22C (5A) test

Discharge curves at 5C

Discharge curves at 1C

Above you can see the test curves plotted by the Vencon analyzer.

Please disregard that temp spike in the middle, it happened because i touched the sensor.

Initial No-Load Voltage

  Duration (h:m:s): 00:02:00

  

That is the start of the test.

One Hour Discharge

  Duration (h:m:s): 00:25:13

  Load current: 5,003 A

  Cut-off voltage: 2,750 V

  Battery discharged capacity: 2,103 Ah

  Exit condition: Battery cut-off voltage reached.

The battery gave me 2.103Ah for 25 minutes continuously, note the temperature rise, it has reached around 36 Celcius.

Then there is a 10 minute rest, the temperature starts to fall now.

Then there is a pre-qualify charge which finishes in a few seconds and the main charge starts.

At 2.22C (5A) loads

Lithium-ion Charge

  Duration (h:m:s): 01:46:26

  Charge current: 1,575 A

  Charge voltage: 4,200 V

  Battery charged capacity: 2,124 Ah

  Battery charged energy: 8,351 Wh

  Exit condition: Final charge current reached.

This took 1 hour and 46 minutes.

After charging the 5A discharge took place one more time.

One Hour Discharge
  Duration (h:m:s): 00:25:13
  Load current: 5,003 A
  Cut-off voltage: 2,750 V
  Battery discharged capacity: 2,103 Ah
  Battery discharged energy: 6,773 Wh
  Battery initial-point voltage: 3,734 V
  Battery mid-point voltage: 3,135 V
  Battery end-point voltage: 2,752 V
  Battery midpoint current: 5,003 A
  Exit condition: Battery cut-off voltage reached.

Pass!    Capacity=2,086 Ah (92,7% rated); Energy=6,744 Wh

Summary:
1. One Hour Discharge: Pass; Capacity=2,103 Ah (93,5% rated); Energy=6,773 Wh; IPV=3,734V; MPV=3,135V; EPV=2,752V; MPI=5,003 A.
2. Lithium-ion Charge: Capacity=2,124 Ah (94,4% rated); Energy=8,351 Wh.
3. One Hour Discharge: Pass; Capacity=2,086 Ah (92,7% rated); Energy=6,744 Wh; IPV=3,762V; MPV=3,149V; EPV=2,751V; MPI=5,003 A.
4. Li-ion 30% Charge: Capacity=675,1 mAh (30,0% rated); Energy=2,520 Wh.

At 1C (2250mA) loads


Pass!    Capacity=2,103 Ah (93,4% rated); Energy=7,302 Wh

Summary:
1. One Hour Discharge: Pass; Capacity=2,186 Ah (97,2% rated); Energy=7,611 Wh; IPV=4,013V; MPV=3,264V; EPV=2,752V; MPI=2,250 A.
2. Lithium-ion Charge: Capacity=2,130 Ah (94,7% rated); Energy=8,334 Wh.
3. One Hour Discharge: Pass; Capacity=2,103 Ah (93,4% rated); Energy=7,302 Wh; IPV=4,000V; MPV=3,268V; EPV=2,753V; MPI=2,250 A.
4. Li-ion 30% Charge: Capacity=675,3 mAh (30,0% rated); Energy=2,505 Wh.

One Hour Discharge

  Duration (h:m:s): 00:58:18

  Load current: 2,250 A

  Cut-off voltage: 2,750 V

  Battery discharged capacity: 2,186 Ah

  Battery discharged energy: 7,611 Wh

  Battery initial-point voltage: 4,013 V

  Battery mid-point voltage: 3,264 V

  Battery end-point voltage: 2,752 V

  Battery midpoint current: 2,250 A

  Exit condition: Battery cut-off voltage reached.

Lithium-ion Charge

  Duration (h:m:s): 02:05:07

  Charge current: 1,575 A

  Charge voltage: 4,200 V

  Battery charged capacity: 2,130 Ah

  Battery charged energy: 8,334 Wh

  Exit condition: Final charge current reached.

One Hour Discharge

  Duration (h:m:s): 00:56:04

  Load current: 2,250 A

  Cut-off voltage: 2,750 V

  Battery discharged capacity: 2,103 Ah

  Battery discharged energy: 7,302 Wh

  Battery initial-point voltage: 4,000 V

  Battery mid-point voltage: 3,268 V

  Battery end-point voltage: 2,753 V

  Battery midpoint current: 2,250 A

  Exit condition: Battery cut-off voltage reached.

Li-ion 30% Charge

  Duration (h:m:s): 00:32:17

  Charge current: 1,575 A

  Charge voltage: 4,200 V

  Battery charged capacity: 675,3 mAh

  Battery charged energy: 2,505 Wh

  Exit condition: Maximum charge reached.

This battery has been rated around 92-93% capacity when discharged at 5Amps and 97 to 93% at 1C which seems to be great (i got 95% with a different battery at 5A). Anything above 80% seems to be OK but i prefer to get the most. After that the analyzer charges the battery up to 30% for storage mostly. Soon i'll be able to discharge at maximum rates (10A for the panasonic.) Also take a note on the temperature and how it varies depending on the current.