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Best way to determine 18650 capacity, resistance and condition ?

o.thornwall

I'd like to get idea on the best way or process to check the capacity, resistance and usable condition of used 18650 batteries ?

I plan on buying several hundreds of these batteries for an up coming project .

 

Thank you, Oscar.

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  • Hi Oscar,

     

    To do this would require banks of equipment, most likely battery testers (example is BA6010), and power supplies and DC loads, and without enough equipment it will be hundreds of hours of testing (not to mention the time+cost to automate this, and getting someone to swap batteries in/out every hour or so).

    I think the testers will cost more than several hundred used batteries.

    By the way (since you have discussion comments about series/parallel batteries), you may need to consider buying more batteries, in order to find sufficient ones that are similar, and it could still be risky with used batteries. It may be better to just buy new batteries from a trusted manufacturer+distributor.

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  • Hi Oscar,

     

    To do this would require banks of equipment, most likely battery testers (example is BA6010), and power supplies and DC loads, and without enough equipment it will be hundreds of hours of testing (not to mention the time+cost to automate this, and getting someone to swap batteries in/out every hour or so).

    I think the testers will cost more than several hundred used batteries.

    By the way (since you have discussion comments about series/parallel batteries), you may need to consider buying more batteries, in order to find sufficient ones that are similar, and it could still be risky with used batteries. It may be better to just buy new batteries from a trusted manufacturer+distributor.

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