Battery Holder info

Hello. I am looking for a standalone battery holder component for a single 3.7 volt lithium ion battery (2000 mAh) and don’t see any listed. Can anyone recommend correct search terms or a link? Thanks.

Hello. Welcome to the technical forum. Do you have the physical size of the battery? I would need that informaiton to try to find a battery holder.

Hi. Thanks for the quick reply. It looks like 6.5cm x 1.75cm. There is a number on the front that reads: 18650.

Garberiel 2000 mAh 3.7 lithium ion.

Here is the link for some barrey holders for the 18650:

Thanks so much!

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Hello and thank you so much for your help with the batter holders. They work great, but now I am having trouble with the lithium ion battery leaking. I will dispose of it safely, but I was wondering if you carried any kind of battery that would power the ICStation 8M Sound Module circuit board I am using. This may be out of your area of expertise, in which case, no worries. Just asking in case you had any idea what else I could use that might be safer. I’d like to do a small run of these items, once I can get a good prototype made.

Below is an image of the sound module in case that helps.

Hi @cburke ,

When batteries leak, they emit dozens of poisonous gasses and other physically toxic elements, they are also a chemical fire and regular fire hazzard so I hope you are taking proper measures for safety. When used and maintained properly they can be beneficial over other battery types. They are typically stable batteries however are pretty picky if something isn’t right with charging, discharging, physical damage, and/or improper storage.

Li-Ion batteries should be balanced charged to about 4.1v per cell max, and discharged no lower than about 2.9v-3.2v per cell minimum. Other factors to consider is the charge/discharge rate of the battery usually derrived by the “C” or C Rating (capacity). If the load is pulling more than the C rating of the battery it can also damage the battery -this is especially the case when operating the battery in hot or cold conditions. When storing Li-Ion, they like to be sitting at about 3.7v per cell and prefer cooler storage temperature. Manufacturers may have differences, please verify their exact specifications.

With all that, i’d make sure the battery and charger being used are compatible and the application is not discharging the battery too low otherwise you’d have to go over to NiMh or NiCd chemistries.

Click here for high quality battery 1908-LI18650JLPROTECTED-ND

Click here for single cell charger 2791-XTARSC1-ND

Other additional options, click here.

That’s abnormal, to say the least. If not caused by damage on your part, it would suggest a defective or poor quality cell, or that the battery management functions of the board you’re using are defective and causing damage. I would not be at all surprised if the latter possibility were the case.

The device appears intended for use with a Li-ion cell, and includes a charge function which (presumably) is adapted for that chemistry. Charge algorithms for nickel-based cells differ, and attempting to substitute them in an application designed for Li-x will yield results that are sub-optimal, if not hazardous.

Understanding the cause of the apparent cell leakage would seem quite important here, and I would strongly advise against using the board mentioned in a product offered for resale without validation of the battery management and charging functions.

Thanks for your time, Ryan. I don’t know for sure if it is leaking. I am using the board and the battery (in a digikey-purchased battery holder) in a DIY art project as a gift (essentially making a talking doll).
In assembling the base, I may have twisted the soldered battery leads from the board and caused a short. I didn’t hear or see anything at the time, but felt a slimy fluid on the battery, like it was sweating it out. I immediately disconnected it, washed up with soap and put the battery inside a metal lunchbox. It does not appear to have continued leaking the oily substance. I am taking it to be disposed today.

I bought the board on Ebay. It seems like something this simple should be able to be powered without resorting to dangerous options. I could ask the seller about “validation of the battery management and charging functions”. She has been very responsive but she is not native English speakers and I have a feeling I won’t understand her explanation.

The battery will be connected, the holder and the circuit board will be hot-glued inside a plastic base. Is this not advisable, in your opinion?

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Apologies! Rick.

I expect that “slimy fluid” would be the battery electrolyte–most definitely not something that should be leaking.

Don’t bother talking to the seller; in practice you assume all risks and liability for product safety when you buy low-cost product from overseas sources through unofficial channels. By “validating battery management and charging functions” I’m talking about doing your own engineering analysis to determine that the item wasn’t designed in a half-baked manner to save a few cents.

it’s also possible that you just got a bad cell, or that it was damaged in some as-yet unknown way. Defects do occur. It’s tough to diagnose such things from this side of the screen.

There are plenty of decent resources (example here) available on appropriate care & feeding of lithium cells. If that’s getting a bit too chewy, using a cell with built-in protection against over/under charge like the one linked above is a way to hedge one’s bets.

Thanks, Rick. I see your points. I will purchase the cell you suggest. And again, thanks for your time.

@cburke ,

And remember to clean out your metal lunchbox VERY good wearing proper PPE before using it again for a lunchbox! …you may want to dispose of the lunchbox and the doll if it has any battery toxins on it :slight_smile: