Test/Review of Charger Xtar VP2

59 posts / 0 new
Last post

Pages

HKJ
HKJ's picture
Offline
Last seen: 2 weeks 2 days ago
Joined: 05/24/2011 - 12:23
Posts: 7454
Location: Copenhagen, Denmark
Test/Review of Charger Xtar VP2

Charger Xtar VP2

DSC_5522
DSC_5524 DSC_5523

Xtar has many good LiIon chargers, this is an upgrade to their most advanced charger the VP1. It has two channels, each with a voltmeter, 3 current settings and 3 voltage settings. It can also be used as a usb power box.

DSC_5516 DSC_5517 DSC_5518 DSC_5519

It comes in a cardboard box with a window.

DSC_5521

In the box is the charger, a power supply, a car adapter, a instruction sheet, a warranty card and a sheet about LiIon batteries.
The sheet about LiIon list the advantage with using LiIon batteries and has a table with the 3 different types that this charger can handle.

DSC_5531

The charger has a DC connector for power input, a usb output and a voltage switch. The actual position of the voltage switch is shown on the display of the charger, when no batteries are in the charger, I believe this is a very good idea.

DSC_5525 DSC_5526


The slots have raised battery connections, i.e. flat top batteries can be used. The slider works very smooth and can take batteries from 30mm to 71.2mm.

DSC_5530

On the top of the charger is a switch to select charge current, it can select between 0.25A, 0.50A and 1.00A, the current will be the same in both slots. There is also two leds to show when the batteries are full. The leds are red when charging and green at other times. When usb output is activated the one for the usb battery is used to show the battery charge state.
Below the switch is the display, by holding the switch down the display can be turned off/on (but not the leds), this will not affect any function in the charger.

DSC_5557

Here is the display captured during startup, where all elements can be seen.

DSC_5554 DSC_5553
DSC_5552

When there is no battery in the charger, the display will show the selected charge voltage, this will also be shown if the switch is changed during charge. The selected current will be shown between the two voltage displays.

DSC_5555

During charge the display will show the actual battery voltage and the battery icon is animated.

The user interface is a good upgrade from VP1 with the charge leds and the white background lightning is shield much better on this charger.
The voltmeter has a good precision, when charging it will show slightly above the battery voltage, as expected. Sadly it will not really work above max. charge voltage: it will show one value and then stop updating.

DSC_5532

Xtar has recently started adding a product verification code to their equipment. This code can be verified on their website.

supportedBatteryTypes

supportedBatterySizes DSC_5536 DSC_5538 DSC_5537
DSC_5535 DSC_5540 DSC_5534 DSC_5533 DSC_5539

The charger can handle 70 mm long batteries, inclusive flat top cells.



Measurements

  • Changing the voltage selector will restart charging.
  • Below 2.0 volt the charge current is 1.5 mA.
  • Between 0.15 volt and 2.0 volt the battery symbol will flash and voltage will be updated, but it need 1 volt to start this mode (Led is red).
  • Between 2.0 and 2.9 volt the charger current is about 50mA/50mA/80mA in the 3 current ranges (Led is red).
  • Above 2.9 volt the regular CC/CV is used, see curve below.
  • Without power it will discharge the battery with about 12mA on usb channel and 5mA on the other channel.
  • With power it will charge with about 0.3 mA when the battery is full.
  • Build in voltmeter is within +/-0.01 volt when not charging.
  • Build in voltmeter about +0.01 volt at 0.25A
  • Build in voltmeter about +0.02 volt at 1.00A
  • The voltmeter can show voltages from 0.01 volt to above 4.35 volt, but will freeze the reading, when it is above selected charge voltage and not resume updating, before voltage is below again.
  • When selecting charge voltage without a battery in the charge the voltmeter shows selected voltage.
  • Charge will restart if battery voltage drops to 3.9 volt (3.3 in LiFePO4 mode).
  • The charger will restart when a battery is inserted or power is cycled.
  • Because each channel is independent, the different voltages varies between the channels with a small amount.



Xtar%20VP2%201A%20(PA18650-31)%20%231

First charge curve shows a very nice CC/CV curve with a termination about 70mA. This is a very good charge curve.

Xtar%20VP2%201A%20(PA18650-31)%20%232

The other channel does also work fine.

Xtar%20VP2%201A%20(BE18650-26)%20%231

Xtar%20VP2%201A%20(PA18650-34)%20%231

Different capacity batteries, need different charge time.

Xtar%20VP2%200.5A%20(PA18650-31)%20%231

Reducing the charge current to 0.5A, does reduce the termination current slightly and it uses the same good CC/CV curve.

Xtar%20VP2%200.25A%20(PA18650-31)%20%231

The 0.25A charge current uses same termination as 0.5A, this time the termination current is on the high side.

Xtar%20VP2%201A%20(AW16340-IMR)%20%231

Trying to provoke the charger with my old 16340 cell does not show any problems, the charger handles it nicely.

Xtar%20VP2%200.25A%20(AW16340-IMR)%20%231

Reducing the charge current to the 16340, makes the curve more smooth.


Xtar%20VP2%200.5A%20(KP14500-08)%20%231

A 14500 cell at 0.5A works fine.

Xtar%20VP2%200.5A%20(AW18350-IMR)%20%231

Same with a 18350 at 0.5A.

Xtar%20VP2%201A%20(2xPA18650-31)

There is not much difference between charging one and two cells at the same time.

Xtar%20VP2%201A%2012V%20(2xPA18650-31)

Using an external 12V supply, the charger draws nearly 1A while charging.

Temperature1

M1: 43,4°C, M2: 42,1°C, M3: 44,3°C, HS1: 59,2°C

Temperature2

M1: 43,2°C, M2: 41,8°C, M3: 44,2°C, HS1: 56,0°C
There is no surprise in the temperature profile: The electronic generates some heat, this makes the usb connector hot and increases the temperature of the batteries.

Poweron

The charger needs about 10 seconds to turn on and will always turn on at the 0.25A setting.

CurrentChange

When selecting a higher current, the charger will slowly increase the charge current, until the new setting is reached.

ChemistryChange

A chemistry change stops the charger and restarts it a bit later.




3.0 and 3.2 volt batteries (LiFePO4)

Some LiIon are marked 3.0 volt, they are usual 3.2 volt LiFePO4 batteries and must be charge with a 3.6 volt charger. The VP2 has a setting for this.

Xtar%20VP2%201A%20(18650-LiFePO4)%20%231

Again the charge does a nice CC/CV and turns off when the battery is full.

Xtar%20VP2%200.5A%20(14500-LiFePO4)%20%231

I did start with the cell fully discharged and the charger starts reviewing the cell, first going to full current when the voltage reach 2.9 volt.
It does not adjust that setting when changing battery voltage. The actual charge curve is fine.



4.35 volt charging (Switch at 3.8 volt)

A few LiIon batteries can be charged with a higher voltage than the usual 4.2 volt, either 4.30 volt or 4.35 volt. This charger supports the 4.35 volt type, the 4.30 volt type must be charged with 4.20 volt or can be charged with the 4.35 volt if the voltage of the charger is slightly low (This MUST be verified on the charger first).

Xtar%20VP2%201A%20(LG18650-30)%20%231

The 4.35V charging does also look perfect.



USB output

  • Does not turn output off automatic when unloaded, this requires a button press.
  • Usb output is coded as Apple 1A
  • Display is off when using usb output.
  • The green led is on above 3.5 volt battery voltage.
  • The red led is on above 3.15 volt battery voltage.
  • Below 3.15 volt the red led is flashing.
  • When a lower voltage led indication has been activated, the battery must be removed to reset it.
  • Usb will discharge the battery with 24mA when nothing is connected, but it is turned on.
  • Only one slot is used for usb output power.
  • Usb output can only be used when the charger is without 12 volt power.
  • The usb output has a fairly high current drain, also when off. I.e. do not store batteries in the charger (It can drain a battery in about 10 days).



XTAR%20VP2%20load%20sweep

The usb output is very stable, even at 2A load, I would have preferred that there was a overload cutout.

Xtar%20VP2%20out%205ohm%20(PA18650-31)

The usb output has no problems with a 1A load, the efficiency is about 90% and it turns off the output when the battery is down to 3 volt. This looks very good.

Xtar%20VP2%20out%2010ohm%20(PA18650-31)

Same with 0.5A load (I let the recording run for a few hours after the output turned off).

Xtar%20VP2%20out%2010ohm%20(BE18650-26)
Xtar%20VP2%20out%2010ohm%20(PA18650-34)

Other battery capacities changes the time the output is on, but the function is still good.

5ohm

There is very little noise in the output, 8mV rms and 60mVpp with a 1A load.

10ohm

Reducing the load to 0.5A, does also reduce the noise to 6mV rms and 50mVpp.



Testing the mains transformer with 2500 volt and 5000 volt between mains and low volt side, did not show any safety problems.



Conclusion

This charger can be used for nearly all LiIon batteries on the market and will charge them correctly. The usb output delivers very clean power, but it lacks a overload cutout.

This charger is a nice update to the VP1 charger and like the VP1 I will call it a very good charger.

Is there a reason to upgrade from the VP1? The actual charging is the same, but VP2 support more chemistries, larger batteries and it has a very visible led, showing when it is finished with charging. If you are using or going to use any of these batteries that it now support, an upgrade might be a good idea.


Could I wish for more in this charger? The answer is yes, there are a few minor details I would have liked: 0.1A setting (Some small lights use very small LiIon batteries) and 4.30 volt charging.



Notes

The charger was supplied by Xtar for review.

Here is an explanation on how I did the above charge curves: How do I test a charger

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

Edited by: sb56637 on 06/25/2015 - 14:21
mm166
Offline
Last seen: 8 months 2 weeks ago
Joined: 04/28/2013 - 16:27
Posts: 344
Location: If you want, enter your geographic location here.

Thank you a lot for a review!

jacktheclipper
jacktheclipper's picture
Offline
Last seen: 17 hours 52 min ago
Joined: 10/31/2010 - 21:18
Posts: 4919
Location: Florida , U.S.A.

Thanks for your ( as always ) well done review .

What I do

 

Krümelmonster
Offline
Last seen: 1 year 4 months ago
Joined: 02/18/2014 - 06:34
Posts: 3
Location: Earth
HKJ wrote:
Could I wish for more in this charger? The answer is yes, there are a few minor details I would have liked: 0.1A setting (Some small lights use very small LiIon batteries) and 4.30 volt charging.

Best Statement ever!

I would still like a charge option for store Li-ion Batteries 3,7V for Panasonic NNP-serie and 3,9V for other LiCoO2 Battreries Smile

pipifax
Offline
Last seen: 4 years 8 months ago
Joined: 01/05/2014 - 05:50
Posts: 310
Location: BLF

Very good charger of a very good review!!

Thank you! :Grade:

 

Your Lifepo cells must be in poor condition. After the 3.6V termination they don't hold the voltage.

HKJ
HKJ's picture
Offline
Last seen: 2 weeks 2 days ago
Joined: 05/24/2011 - 12:23
Posts: 7454
Location: Copenhagen, Denmark

Krümelmonster wrote:
I would still like a charge option for store Li-ion Batteries 3,7V for Panasonic NNP-serie and 3,9V for other LiCoO2 Battreries Smile

I try to limit my wishes to functions that would fit the charger, anything with discharging or more bays is other charger models.

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

RaceR86
RaceR86's picture
Offline
Last seen: 6 years 4 months ago
Joined: 02/22/2012 - 08:32
Posts: 3777
Location: Norway

Like others said. Thanks for another great review..

Fingers crossed there will be a 4-bay version (with room for four 26650) and no MAP.  0:)

BLF LED database – collaboration spreadsheet and latest news about where to buy LEDs
http://budgetlightforum.com/node/19342

HKJ
HKJ's picture
Offline
Last seen: 2 weeks 2 days ago
Joined: 05/24/2011 - 12:23
Posts: 7454
Location: Copenhagen, Denmark

pipifax wrote:

Your Lifepo cells must be in poor condition. After the 3.6V termination they don't hold the voltage.

They never do and a charger that tries to keep the voltage up will get a lower rating.

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

musicmagic
Offline
Last seen: 7 years 4 months ago
Joined: 10/28/2013 - 09:53
Posts: 984
Location: CT

great review, thanks as always!

If you can’t blind them with your brilliance, baffle them with your bullcrap.

The real currency in the world is not money, it’s trust.

dazed1
dazed1's picture
Offline
Last seen: 1 year 8 months ago
Joined: 05/31/2013 - 11:16
Posts: 1557

50$ for 2 bays….hmm…

Thanks for the review btw, as always amazing HKJ!

Fenix TK61 MOD> resistor, transistors, copper heatsink, Artic Cooling MX4, dedome, 3A > 5.7A ~ 1700 lumens > (600.000cd)

pipifax
Offline
Last seen: 4 years 8 months ago
Joined: 01/05/2014 - 05:50
Posts: 310
Location: BLF

HKJ wrote:
They never do and a

0.20V drop "self-discharge" from 3.6V to 3.4V. within 15minsSurprised

HKJ
HKJ's picture
Offline
Last seen: 2 weeks 2 days ago
Joined: 05/24/2011 - 12:23
Posts: 7454
Location: Copenhagen, Denmark

pipifax wrote:

HKJ wrote:
They never do and a

0.20V drop within 15mins i meant :innocent:

Yes, LiFePO4 does not work the same was a LiCoO2. When you start discharging them they will drop to about 3.2 volt very fast and stay at that voltage until they are empty.

Here is a full test of a LiFePO4 cell: http://lygte-info.dk/review/batteries2012/Unknown%20RCR123A%203.0V%20500...

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

Ouchyfoot
Ouchyfoot's picture
Offline
Last seen: 1 year 4 months ago
Joined: 09/01/2012 - 06:15
Posts: 5089
Location: Canada

How are the sliders on the VP2. I stopped using my VP1 for 18650 because trying to pry back the slider and holding it in place while the cell is inserted became too much of a pain. I now mostly just use side by side SP2s.

lionheart_2281
lionheart_2281's picture
Offline
Last seen: 1 hour 23 min ago
Joined: 10/25/2012 - 18:32
Posts: 3160
Location: Brisbane, Australia
Ouchyfoot wrote:
How are the sliders on the VP2. I stopped using my VP1 for 18650 because trying to pry back the slider and holding it in place while the cell is inserted became too much of a pain. I now mostly just use side by side SP2s.

“The slots have raised battery connections, i.e. flat top batteries can be used. The slider works very smooth and can take batteries from 30mm to 71.2mm”

scottyhazzard
scottyhazzard's picture
Offline
Last seen: 3 years 4 weeks ago
Joined: 08/09/2011 - 19:02
Posts: 1127
Location: Northern California

Awesome review, thanks. I have been wondering about this one. I share the same idea as others in that I hope they make a 4 bay version soon.

"Those who hammer their guns into plows will plow for those who do not."

lionheart_2281
lionheart_2281's picture
Offline
Last seen: 1 hour 23 min ago
Joined: 10/25/2012 - 18:32
Posts: 3160
Location: Brisbane, Australia
scottyhazzard wrote:
Awesome review, thanks. I have been wondering about this one. I share the same idea as others in that I hope they make a 4 bay version soon.

‘ken oath

_the_
_the_'s picture
Offline
Last seen: 2 months 1 week ago
Joined: 07/08/2011 - 06:22
Posts: 3647
Location: Finland

Great review, thanks!

Can't wait to receive mine. Smile

=the=

 

WarHawk-AVG
WarHawk-AVG's picture
Offline
Last seen: 2 years 1 month ago
Joined: 01/04/2014 - 06:47
Posts: 5071
Location: H-Town

HKJ wrote:

pipifax wrote:

HKJ wrote:
They never do and a

0.20V drop within 15mins i meant Innocent

Yes, LiFePO4 does not work the same was a LiCoO2. When you start discharging them they will drop to about 3.2 volt very fast and stay at that voltage until they are empty.

Here is a full test of a LiFePO4 cell: http://lygte-info.dk/review/batteries2012/Unknown%20RCR123A%203.0V%20500...


Daggum…look how flat those discharge volts are…wow!
300winmag
Offline
Last seen: 3 years 5 months ago
Joined: 07/17/2012 - 23:53
Posts: 93
Location: Calgary, Canada
:santa: “VP4 sample is still being tested now, we still need a couple of months for the development.” :santa:
tatasal
Online
Last seen: 5 min 27 sec ago
Joined: 02/15/2012 - 08:40
Posts: 5718
Location: Far East

Oh yes, I have one of this hot charger coming up at no cost at all. Thanks Xtar!

lionheart_2281
lionheart_2281's picture
Offline
Last seen: 1 hour 23 min ago
Joined: 10/25/2012 - 18:32
Posts: 3160
Location: Brisbane, Australia

I imagine the VP4 will be the long anticipated replacement for my i4

dazed1
dazed1's picture
Offline
Last seen: 1 year 8 months ago
Joined: 05/31/2013 - 11:16
Posts: 1557
lionheart_2281 wrote:
I imagine the VP4 will be the long anticipated replacement for my i4

But will it be good enough to replace the Opus?

Fenix TK61 MOD> resistor, transistors, copper heatsink, Artic Cooling MX4, dedome, 3A > 5.7A ~ 1700 lumens > (600.000cd)

tatasal
Online
Last seen: 5 min 27 sec ago
Joined: 02/15/2012 - 08:40
Posts: 5718
Location: Far East
dazed1 wrote:
lionheart_2281 wrote:
I imagine the VP4 will be the long anticipated replacement for my i4

But will it be good enough to replace the Opus?

We can’t compare the 2 chargers since the Opus is an analyzing charger/discharger, including facility for Nimh, while the other one (VP2) is a pure Li-ion charger only, (full list of functions not yet known) for the ‘VP4’.

dazed1
dazed1's picture
Offline
Last seen: 1 year 8 months ago
Joined: 05/31/2013 - 11:16
Posts: 1557

I agree Smile

Fenix TK61 MOD> resistor, transistors, copper heatsink, Artic Cooling MX4, dedome, 3A > 5.7A ~ 1700 lumens > (600.000cd)

300winmag
Offline
Last seen: 3 years 5 months ago
Joined: 07/17/2012 - 23:53
Posts: 93
Location: Calgary, Canada

I can’t wait months, anybody have a Canadian source for the VP2? The shipping, Customs/Duty is killing me!!!

Ouchyfoot
Ouchyfoot's picture
Offline
Last seen: 1 year 4 months ago
Joined: 09/01/2012 - 06:15
Posts: 5089
Location: Canada

300winmag wrote:
I can’t wait months, anybody have a Canadian source for the VP2? The shipping, Customs/Duty is killing me!!!

Coming soon
http://www.hidcanada.com/collections/led-products/products/xtar-vp2-ulti...

Coupon code(if still valid) GIMME5 or 5LIGHT
Free shipping over $50

RaceR86
RaceR86's picture
Offline
Last seen: 6 years 4 months ago
Joined: 02/22/2012 - 08:32
Posts: 3777
Location: Norway

dazed1 wrote:
lionheart_2281 wrote:
I imagine the VP4 will be the long anticipated replacement for my i4
But will it be good enough to replace the Opus?

If there is a VP4 it will probably replace the Opus in every day use just because its silent.

Even my SP2, VP1 and various Nitecore chargers gets used before the noisy "dreamcharger".

The Opus is nice due to certain features. But for normal "everyday charging", not so nice due to fan noise.

Looking forward to get a VP2 too. Smile

BLF LED database – collaboration spreadsheet and latest news about where to buy LEDs
http://budgetlightforum.com/node/19342

my9221
Offline
Last seen: 18 min 43 sec ago
Joined: 07/26/2011 - 02:18
Posts: 872
Location: United States

Thanks for the pics & very detail reviews. I like this charger with a switch to change different voltage.

300winmag
Offline
Last seen: 3 years 5 months ago
Joined: 07/17/2012 - 23:53
Posts: 93
Location: Calgary, Canada

Ouchyfoot wrote:
300winmag wrote:
I can’t wait months, anybody have a Canadian source for the VP2? The shipping, Customs/Duty is killing me!!!

Coming soon
http://www.hidcanada.com/collections/led-products/products/xtar-vp2-ulti...

Coupon code(if still valid) GIMME5 or 5LIGHT
Free shipping over $50

Thanks for the link!
Already emailed them, contrary to the website they don’t carry them and won’t be for a long time if at all…

TehSpaz
Offline
Last seen: 3 years 4 months ago
Joined: 05/18/2013 - 04:02
Posts: 266
Location: Texas

HKJ, I don’t think I’ve ever said this before, but I’ve come to greatly appreciate what you do over my past year on BLF: reviews, discussions, and otherwise. Thank you for yet another excellent post!

“That’s why I got two, one for the each of ya”

MountainKing
Offline
Last seen: 22 hours 32 min ago
Joined: 12/01/2011 - 03:20
Posts: 2262
Location: Lost Islands ™

Thanks for the review. Currently considering my first LION charger….Is this the best lion charger from xtar as at date?

Never ever forget and forgive. Niwal**er new kid on the block trying to act tough.
http://budgetlightforum.com/node/24847
Do not support this brand.

DINODIRECTSCAM COMPANY. DO NOT BUY
http://budgetlightforum.com/node/11324?page=2#comment-254983

Pages