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Liitokala Engineer Lii 500 Charger
#11
I am just getting started which unit is better the LiitoKala Lii-500 or Opus BT - C3100 V2.2
Or does each have their place? I have TP4056 and a iMax B6AC V2 but want to be able to do more.
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#12
(11-16-2017, 12:48 PM)SemaJG Wrote:
(11-16-2017, 12:03 PM)jestronix Wrote: Just ordered 3 of these, being cheap I'm not expecting the world, I like the norm test, if they play up I'll move over to the opus.

Norm test works ok... if your chargers aren't faulty like mine Big Grin
I think it only discharges at 700mA though which is ok for me, could be wrong. Might be worth pre-charging the cells somehow if possible and testing in the Liitokalas to save the units which is what I plan to do from now on.

Jimmy

Max discharge is 500ma

If you select Nor Test and 700ma or 1000ma, it will charge at up to 1000ma, but discharge at 500ma.
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#13
you rekon the charging is killing these ? getting too hot?
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#14
(11-17-2017, 03:05 AM)jestronix Wrote: you rekon the charging is killing these ?  getting too hot?

I'm not sure. I've always set mine to Nor Test 1000ma. The cells are usually charged in another charger before going into the LitoKala for the test cycle, but they are fully charging in the LitoKala after the discharge test. 


Mine have been going okay, but it's only a sample of 2 (I haven't had the third one long), so I might have been lucky.
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#15
My three arrived and all working well Smile. They really sit for a long time to soak in at 4.2, they might be pushing in 20mah for half hour of your time.
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#16
(11-17-2017, 03:05 AM)jestronix Wrote: you rekon the charging is killing these ?  getting too hot?

I wish I knew, I have charged my share of Sanyo's which can get pretty hot and some Sony cells which can also get red but they are usually bad cells unlike many of the Sanyo's.
I didnt notice any really bad heat on the day they both malfunctioned but I could have been distracted.
I was doing a norm test on some pink Samsung cells as far as I can remember. I was in the office with the chargers and one failed when I checked them at intervals during the day. The following day I noticed the other one when I loaded the cells for another charging session. I couldnt switch between slots with the buttons it would only show the last cell I put in. Possibly a component could be software maybe?

J
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#17
(11-17-2017, 06:49 PM)SemaJG Wrote:
(11-17-2017, 03:05 AM)jestronix Wrote: you rekon the charging is killing these ?  getting too hot?

I wish I knew, I have charged my share of Sanyo's which can get pretty hot and some Sony cells which can also get red but they are usually bad cells unlike many of the Sanyo's.
I didnt notice any really bad heat on the day they both malfunctioned but I could have been distracted.

J

Mine just started to act the same as yours after getting 2 Sanyo cells HOT, I cannot use any buttons, is stuck in charging mode(what I was doing last) @500mA.
Noticed one cell was leaking but opened the charger and electrolyte didn't got on pcb, so it must be the hot temp who kill it, was planing to add a big fan on the back to cool it a bit, now is too late.
There are 2 temperature sensors inside but I am not sure on what they are used b/c no temp info or no safety close on hot cells...
Bad design with no cooling and also how the battery stay in, upside down  that makes any leak to get inside and also no safe at all found the other day a cell that was not finishing charging and was getting over 5000 mAh total charge!
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#18
(12-07-2017, 05:04 AM)KaminoReal Wrote:
(11-17-2017, 06:49 PM)SemaJG Wrote:
(11-17-2017, 03:05 AM)jestronix Wrote: you rekon the charging is killing these ?  getting too hot?

I wish I knew, I have charged my share of Sanyo's which can get pretty hot and some Sony cells which can also get red but they are usually bad cells unlike many of the Sanyo's.
I didnt notice any really bad heat on the day they both malfunctioned but I could have been distracted.

J

Mine just started to act the same as yours after getting 2 Sanyo cells HOT, I cannot use any buttons, is stuck in charging mode(what I was doing last) @500mA.
Noticed one cell was leaking but opened the charger and electrolyte didn't got on pcb, so it must be the hot temp who kill it, was planing to add a big fan on the back to cool it a bit, now is too late.
There are 2 temperature sensors inside but I am not sure on what they are used b/c no temp info or no safety close on hot cells...
Bad design with no cooling and also how the battery stay in, upside down  that makes any leak to get inside and also no safe at all found the other day a cell that was not finishing charging and was getting over 5000 mAh total charge!

Mine have been sent back to the seller in China, not too hopeful of a good outcome or replacements which I need. Will post here how I get on. I will have five in total when the ones I orderd arrive, if they replace the broken ones then great.
I think the culprit in my case was a hot cell which leaked its hot electrolyte onto the board.
Theres two temprature sensors on the charger but they didnt kick in in time.
Luckily I had ordered some TP4056 pcb's and cell holders and they are now doing most of the charging.
Im precharging all the cells with these and will charge test with the Liitokalas once the replacements arrive.
Using this method can help save the chargers as many cells only seem to get really hot on the first charge when the damage can be done. If these discharge enough before the capacity test then they never make it to the Liitokalas.
Even Opus chargers die but the Liitokalas seem more fragile but they are also half the cost so....
I recommend making a 20 cell charger from an old pc psu, some TP4056 boards and single cell holders (not the spring type). Its fun and saves in the long term.

Jimmy
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#19
(12-07-2017, 09:07 AM)SemaJG Wrote: I recommend making a 20 cell charger from an old pc psu, some TP4056 boards and single cell holders (not the spring type). Its fun and saves in the long term.
Heh you didn't saw my "workspace" or how I like it to say: battery corner Tongue

I used some of the TP4056  but the board is mostly used for testing so I don't have time to use them anymore for charge.

Anyway I found what was the fault with mine, one of the Sanyo cells was heating and leaked electrolyte, at first look I didn't saw it, I tough is white silicone, but after the ultrasonic cleaning the board came up as new and recovered:

After:

I also applied a layer of NanoProtech for future leaking...

Lazy now but I will do the same for the other chargers I have.
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#20
Super post KaminoReal and great work.... love the workspace too btw! Smile

That very same resistor? is what I suspected to be the problem on mine.

I'm going to treat mine with the Nano Protect .... whatever that is Smile Might even try it on myself at this stage... need something Big Grin

Thanks

Jimmy
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