Help, please, decoding

[Lindrlindr]

LGDBB41865
LGABB41865
LGEBB41865

What does the letter number 3 mean (E)? I have LGEBB41865 (i need to change the battery in the music column (harman kardon onyx studio 1)). I can't find the datasheet this model.

 

[jomax]

Hi,

LG= Brand name
number 3 lace of origin. : A,C,D are made in Korea. E and G is coming from China

have fun,

Johan

 

[Lindrlindr]

Hi,

LG= Brand name
number 3 lace of origin. : A,C,D are made in Korea. E and G is coming from China

have fun,

Johan

Thanks a lot.

 

[Korishan]

i need to change the battery in the music column (harman kardon onyx studio 1)

You can change the battery for one similar. It doesn't have to be the exact same model. The only thing you really want to make sure of that the "C" rating at least matches.
1C = Rated Capacity / 1000.
If your current battery is a 2000mAh cell, and has a rating of 1C, then it can discharge at 2A safely.

Then if you get a replacement, it needs to be able to be rated at 2A discharge minimum.
So with this example, if your replacement cell is a 3000mAh cell, and is rated at 0.5C, then this would be 1.5A. It doesn't meet the requirements. It would have to be at least 0.65C, or 1.9A, to be compatible.

The reason is because if your device regularly pulls power close to the rated amps, then you will 1) drain the battery faster if it's underrated, and 2) will cause the cell to overheat during usage. Both of these you want to avoid.

If you get a cell replacement that is higher in capacity, and has equal C rating, or higher, then you will add longevity to the life, and run time of that battery.

If you are in doubt, don't hesitate to ask here so we can verify your numbers

 

[floydR]

There is a datasheet in the cell database for the LGDBB41865 ;ocated at top of page under battery tools. https://secondlifestorage.com/index.php?threads/lg-lgdbb41865-cell-specifications.2527/ as Korishan says meet the minimum spec of the cells you are replacing. On the second life market LGM261865 cells meet or exceed the requirements they are plentiful too.
later floyd

 

[Lindrlindr]

Korishan / floydR:

Sorry for my English, but thank you for your response.

The description of the model "LGABB41865" says:
2.75V
500mA Standard
5000mA Maximum

The description of the model "LGDBB41865" says:
Discharging:
2.75V
500mA Standard
3750mA Maximum

Why are both models also called "ICR18650B4" if the parameters are different (maximum -- 5A and 3.75A)? Or is it a typo?

The documentation for "ICR18650B4" says:
max. discharge current:
-20~5*C - 0.5C (1250mA)
5~45*C - 2.0C (5000mA)
45-60*C - 1.5C (3759mA)

My harman/kardon studio onyx music speaker has an old battery. The battery is called "LGEBB41865". These are no longer produced. The markings are also different. I'm looking for a similar battery that might fit.

There is a lot of conflicting information on the internet. Many advise high current. Someone advises the NCR type. Head boils.

 

[OffGridInTheCity]

Some general comments:
In general, 18650 NMC chemistry cells fall into 2 general categories. Hi amp (3-5a+) continuous loads are ones rated for 10a or 20a continuous loads such as found in 'ebike' applications with hi amp motor surge requirements. The ones you're referencing on are in the 'laptop' category - e.g. lower continuous amp but steady loads. These are almost always 500ma (0.5a) standard specs.

If you actually try to pull 3.7a or 5a from a 'laptop' (0.5a standard) cell, the voltage will drop so much they hit bottom in a few minutes. Whereas hi-amp cells are made to support hi amp draw but not have so much voltage drop.

Korishan / floydR:

Sorry for my English, but thank you for your response.

The description of the model "LGABB41865" says:
2.75V
500mA Standard
5000mA Maximum

The description of the model "LGDBB41865" says:
Discharging:
2.75V
500mA Standard
3750mA Maximum

Why are both models also called "ICR18650B4" if the parameters are different (maximum -- 5A and 3.75A)? Or is it a typo?

The maximum (5a vs 3.75a) is not that important for laptop cell types with 500ma (0.5a) standard (continuous) loading. The load should be <=0.5a (500ma) for multi-hour use of the cell. It sounds like this is you're situation. So I wouldn't worry about the 3.75a vs 5a but focus on the normal loading of <=0.5a. The 3.75a vs 5a doesn't affect (much) the amount of run-time at standard 0.5a loading.

The documentation for "ICR18650B4" says:
max. discharge current:
-20~5*C - 0.5C (1250mA)
5~45*C - 2.0C (5000mA)
45-60*C - 1.5C (3759mA)

It's a fact that lithium-ion (NMC) chemistries are more prone to internal damage (shorter life span) as you pull hi loads at extreme temps. That's why the max discharge is different for the different temperature ranges - it implies that if you limit to 1.25a at -20-5C then you won't damage the battery so much compared to 5-45C where you can do max. But again, if you're load is standard (0.5a) or less then you're good to go thru the whole temperature range and these numbers do affect the situation.

 

[Korishan]

Yeah, agree with OffGridInTheCity. You don't need to worry about "max" load as much, considering your device is pretty much a steady discharge. So if the original cell was rated at 500mA (0.5A), then your replacement cell needs to meet this, or exceed it. Over all, it would be recommended to go higher for the nominal amp discharge as that means the cells will work less to deliver the same power. Kind of like an 8-cyl engine doesn't need to work as hard to pull 4000lbs as a 4-cyl would.

The other thing to take note of is the capacity. If you can get close to 3000mAh, that'd give you the most run time.

Note: The absolute max for 18650 Li-Ion cells is going to be about 3500mAh. If you see anyone selling these for anything over >=4000mAh for an 18650, they are lying and are fraudster, or super naive.