LiitoKala Lii-S1, successor of the revered Lii-100

[Lightbringer]

@hIKARInoob

I really love a voltage display, but to me this is initially of interest if I charge multiple cells at once from one light to check if the cells have discharged evenly. So for a single cell this is of no interest.

It is if you want to stop charging at, say, 3.6V for storage.

[Finnno]

@Barkuti

@will34

I’m sure the current display is not a real reading, that feature alone would cost the same as the charger tiself

Displaying the current value is as easy as reading the sense resistor voltage drop and displaying the corresponding I = V_sense / R_sense value, no big fuzz really. Just matter of a few extra lines of microcontroller code any widespread and cheap multimeter already has. Actual weighted per unit cost: negligible.

Cheers :partying_face:

…and the cost of display?

Have a doubt it is measured value though, why else show the rounded up value of 0.5A, namely 0.5A?

So, if the display showing either 0.1A or 0.5A is all the benefit, then…

Voltage reading I find not as important as amps

[Finnno]

@Lightbringer

@hIKARInoob

I really love a voltage display, but to me this is initially of interest if I charge multiple cells at once from one light to check if the cells have discharged evenly. So for a single cell this is of no interest.

It is if you want to stop charging at, say, 3.6V for storage.

That combined with automatic stopping of charging would make sense, otherwise…

[Finnno]

…yeah, and the power bank thing on Lii-100 tends to stop working in some circumstances anyway

[Barkuti]

Just sent the following email to these fellows:

@Myself to ShenZhen LiitoKala Power Co. Ltd. (charger factory)

Hello,

Recently brought up the “LiitoKala Lii-S1, successor of the revered Lii-100” thread on BudgetLightForum.com: https://budgetlightforum.com/t/-/49693

After the success of the Lii-100 we're thrilled with the Lii-S1. The charger's product page states “Ø Built-in digital tube indicator shows the real-time charging status of voltage and current”, we just want to get confirmation about this so, is the displayed current value actually calculated from the voltage drop at the sense resistor or sort of? If this is so we should witness the constant voltage phase current tapering on the display, right?
Thank you in advance. (^̮^)

Best regards,
Salvador Barqueros Provencio

We'll know soon.

Cheers ̿̿̿̿ ̿̿ ̿̿ ̿'̿'\̵͇̿̿\з= ( ▀ ͜͞ʖ▀) =ε/̵͇̿̿/’̿’̿ ̿ ̿̿ ̿̿ ̿̿

[Pete7874]

Uh… oh… we need a coupon code… a significant one at that. I am not paying more than $2.99 for it.

[Pete7874]

Features cell polarity detection and does away with the powerbank function.

I don’t see a NiMH display, but the description does mention NiMH support. Weird.

[Finnno]

@Pete7874

Features cell polarity detection and does away with the powerbank function.

And also no NiMH support.

So…
Instead of fixing relatively high 100mAh for NiMH they remove support altogether?
Instead of fixing power bank function they remove it?

Instead of that we get (useless?) display

Wow

Hope above proves wrong though

But if it is not, then this is not Lii-100 relacement

[Pete7874]

@Finnno

@Pete7874

Features cell polarity detection and does away with the powerbank function.

And also no NiMH support.

So…
Instead of fixing relatively high 100mAh for NiMH they remove support altogether?

I misread. Description does mention NiMH support, but there appears to be no NiMH indicator light on the display.

[Pete7874]

@Finnno

…yeah, and the power bank thing on Lii-100 tends to stop working in some circumstances anyway

My 100B (the one without power bank function) actually does not overcharge cells like the 100 does. I wonder if it’s the power bank circuitry that’s to blame somehow. Maybe this S1 will not overcharge because it has no power bank function?

[Barkuti]

The display features indicators for lithium chemistries: this is termination voltage adjustment. There's no charging parameter or algorithm ambiguity for Ni-MH thence no need for an indicator.

The powerbank function may be a bit tricky with the rail and contact resistances getting in the way.

Cheers

[ZoomieFan]

Sure it looks nice, but what’s the use of it?
I just put my cells in a charger and that’s it. I’m not going to watch the numbers on the charger for several hours.
What I would like is time remaining until 100%

[mrheosuper]

No Ni-mh charging?

[hIKARInoob]

@mrheosuper

No Ni-mh charging?

Yes there is.

@Pete7874

@Finnno

…yeah, and the power bank thing on Lii-100 tends to stop working in some circumstances anyway

My 100B (the one without power bank function) actually does not overcharge cells like the 100 does. I wonder if it’s the power bank circuitry that’s to blame somehow. Maybe this S1 will not overcharge because it has no power bank function?

I think they fixed the over charging of the 100. I can’t remember if I’ve tested all three, but at least the one I tested terminates at 4.18V.

[Pete7874]

I think they fixed the over charging of the 100. I can’t remember if I’ve tested all three, but at least the one I tested terminates at 4.18V.

The one I received last month overcharges.

[hIKARInoob]

@Pete7874

I think they fixed the over charging of the 100. I can’t remember if I’ve tested all three, but at least the one I tested terminates at 4.18V.

The one I received last month overcharges.

… Then it’s a cheap charger? If there is variance resulting in some samples over charging… I think I’ll re-test all three of mine soon.

[Barkuti]

My home Lii units pump up to these voltages when set to 4.2V li-ion:

• Lii-100 Mk1: 4.22V.
• Lii-202: 4.14 and 4.16V.

Furthermore, my Lii-202 fills up Ni-MH cells significantly more than the old Lii-100 Mk1.

Cheers :-)

[hIKARInoob]

^ Do you think final voltage is also dependent on type of cell and internal resistance?

[Barkuti]

The maximum cut-off voltage of each charging rail can be directly read over it when the charger is in CV mode, which is easily caused on purpose by attaching some high resistance in series with a cell like alligator clamps with magnets. Actual maximum resting voltage will be somewhat below this value depending on termination current and rail to cell total resistance.

Cheers :-)

[Pete7874]

@Barkuti

My home Lii units pump up to these voltages when set to 4.2V li-ion:

• Lii-100 Mk1: 4.22V.

How do you tell if you have an Mk1 or some other version?

Also, is 4.22V cell’s resting voltage right after you’ve removed it from the charger? Or voltage while still charging?