New XTAR VC8

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bmengineer
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New XTAR VC8

XTAR posted these images in their Facebook group - looks like they're working on their biggest charger yet!

No other word yet, but the picture of the back of the charger shows some information:

  • USB-C input up to 9V/2A
  • Charges cells at 1x3A, 2x2A, 4x1A, or 8x0.5A
  • Support for all common Li-Ion cell formats from 10440 and 16340 through 21700 and 26650 (no word on max cell length at this time)
  • Support for all common NiMH cell formats from AAAA through C

The left display has mode/current buttons whereas the right display has display/current beneath it - the presence of a "mode" button may indicate the charger has some basic storage/capacity rating functions like the VC4S, which may make the enormous capacity more useful for some.

8 bay chargers aren't all that common (for good reason - I rarely find myself using more than 2 bays at once), but there's a market for them, and I think this is the first with USB-C.

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Mishanchik
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9V-2A input =18W = fail

Why not use PD input:
USB PD:
5V@2А
12V@1.5А
12V@3А
12-20V@3А
12-20V@4.75-5А

It was possible to take up to 100W from a power supply with support PD 3.0

It could give up 8×3A!!!

18Wt input in 2019 charger – this is fail!

Lexel
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Mishanchik wrote:
9V-2A input =18W = fail

Why not use PD input:
USB PD:
5V@2А
12V@1.5А
12V@3А
12-20V@3А
12-20V@4.75-5А

It was possible to take up to 100W from a power supply with support PD 3.0

It could give up 8×3A!!!

18Wt input in 2019 charger – this is fail!

They could also use an internal 50W PSU, so only a normal wall cable needed, should, not make it bigger, the Miboxer 4 slot C12 has internal and has 4×1.5A

jojosupir
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bmengineer wrote:
Support for all common Li-Ion cell formats from 10440 and 16340 through 21700 and 26650 (no word on max cell length at this time)

I read somewhere it supported protected 21700/20700 cells.
d_t_a
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The Xtar VC8 is listed in Xtar’s AliExpress store:

https://www.aliexpress.com/item/4000245100112.html

Quote:

  • 8-slot charger with LCD (VC8=VC4+VC4S)
  • Support QC3.0 input, max. 3A charge current
  • Type-C input
  • Five optional charging current(3A/2A/1A/0.5A/0.25A)
  • Can charge most of your batteries Apply to 3.6V/3.7V Li-ion IMR/INR/ICR 10440-26650 and 1.2V Ni-MH/Ni-CD A-AAAA batteries , btw,it can also charge protected 20700/21700 protected batteries
  • Store function and battery capacity grade function


It’s probably the first USB-powered 8-slot li-ion battery charger that I’ve encountered.

Although as mentioned, the input power (assuming 9v @ 2A = 18-watts max) would be very limiting if charging 8 slots at the same time.

If it’s similar to the Xtar VC4S (when using 9v/2A input power), then the limit could be the same: 1× 3A, 2× 2A, 4× 1A (these are for the VC4S), and then 8× 0.5A (for the VC8).

~~~

for comparison:

The Miboxer C8 (8-slot charger, uses external power, DC12v @ 3A = 36-watts) can charge at 4× 1.5A, 8× 0.8A (based on specifications).

In my actual observation for the C8, I notice that when charging between 4 to 8 slots (5, 6 or 7 li-ion batteries), the charging current automatically balances and appears to total to around 6.0 Amps (based on LCD display).

Thus if the Miboxer C8 had been charging 4 slots at 1.5A, adding another battery will automatically modify each slot charging current (assuming “automatic charging current” selection to 5× 1.2A charge current each. If add another battery, that will become 6× 1.0A each. And adding another battery to 7 batteries, becomes 0.85A each. (the “charging current” is based on what’s displayed on the C8’s LCD screen)

4× 1.5A = 6.0A
5× 1.2A = 6.0A
6× 1.0A = 6.0A
7× 0.85A = 5.95A
8× 0.8A = 6.4A

amishbill
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Assuming there are no Gotchas with NiMH support or charging protocols in general, I think my buddy will be very interested in this. He needs to charge lots of batteries while on vacation, but they’re not all completely dead and he has all night for the charging to complete.

DIY LT1 battery wrap image. "PDF on Google Drive":https://drive.google.com/open?id=1IHIEOi1NXu868IYNCzIM7D2Ulpxchmww

Fresh Sanyo NCR18650GAs already wrapped "for sale HERE":http://budgetlightforum.com/node/69120 if you like.

d_t_a
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amishbill wrote:
Assuming there are no Gotchas with NiMH support or charging protocols in general, I think my buddy will be very interested in this. He needs to charge lots of batteries while on vacation, but they’re not all completely dead and he has all night for the charging to complete.

Hopefully Xtar added some “safety” charging current limit based on battery length? (eg. VC4S can charge a new low-resistance AAA NiMh battery @ 2 Amps charging current, which is not good for the small capacity AAA NiMh battery…). Hopefully the VC8 will limit charging of AAA NiMh to maybe max 1A for AAA NiMh.

Glenn7
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I’m looking at this one Efest

bmengineer
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d_t_a wrote:
amishbill wrote:
Assuming there are no Gotchas with NiMH support or charging protocols in general, I think my buddy will be very interested in this. He needs to charge lots of batteries while on vacation, but they’re not all completely dead and he has all night for the charging to complete.

Hopefully Xtar added some “safety” charging current limit based on battery length? (eg. VC4S can charge a new low-resistance AAA NiMh battery @ 2 Amps charging current, which is not good for the small capacity AAA NiMh battery…). Hopefully the VC8 will limit charging of AAA NiMh to maybe max 1A for AAA NiMh.

I’d be surprised, most chargers can’t detect length.

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Photonica
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Don’t the dual NiMH/LiIon chargers detect the chemistry? I always assumed it was by voltage.

BTW, BMEngineer – what’s the orange pen-like thing in the picture at the top of your blog?

bmengineer
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Photonica wrote:
Don’t the dual NiMH/LiIon chargers detect the chemistry? I always assumed it was by voltage.

BTW, BMEngineer – what’s the orange pen-like thing in the picture at the top of your blog?

It’s a cheap knock-off of those Exotac fire strikers. I should probably update that image eventually…

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d_t_a
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bmengineer wrote:
d_t_a wrote:
amishbill wrote:
Assuming there are no Gotchas with NiMH support or charging protocols in general, I think my buddy will be very interested in this. He needs to charge lots of batteries while on vacation, but they’re not all completely dead and he has all night for the charging to complete.

Hopefully Xtar added some “safety” charging current limit based on battery length? (eg. VC4S can charge a new low-resistance AAA NiMh battery @ 2 Amps charging current, which is not good for the small capacity AAA NiMh battery…). Hopefully the VC8 will limit charging of AAA NiMh to maybe max 1A for AAA NiMh.

I’d be surprised, most chargers can’t detect length.

Checking HKJ’s reviews and also tested some of them, these chargers use battery length to sort of limit charge current — they differ in battery length threshold to charge at the lower 0.5A current: (quotes are from HKJ’s review)

Xtar/AllMaybe TC2 <= if AllMaybe (an Xtar brand or subsidiary) uses battery length to have lower charge current, I wonder why it’s not done on the higher VC4S model)

Charge will use 0.5A charge current when battery is below about 52mm

Xtar MC1 Ant Plus

Just above 54mm battery length it will switch between 0.5A and 1A charging

Nitecore F1

Around 61mm battery length it will switch between 0.5A and 1A charging

Nitecore SC4

Charger will change between 0.5A and 2A at around 54mm

I haven’t checked which other chargers, but pretty sure there are others.

Mishanchik
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Also Nitecore UM2/UMS2/UM4/UMS4

Fox
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What a huuuuge charger.

I dont have room on my desk for it. XP

The most ugly place in the world! Surprised

RapidLux
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Does it have thermal sensors? I don’t buy chargers without temperature control as this is one of the most important security features.