Battery Pack Cell Identification (18650)

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Hank33
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Battery Pack Cell Identification (18650)

Long story short, was told from scooter place that battery pack will either be LG or Samsung batteries. So from the photo, label says "S3500mAh". Safe to assume it's the Samsung 35E battery then?

 

 

 

                                                                                             

zoulas
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If you trust what it says. It could be a rewrap. You can try measuring the IR and see how it matches the spec sheets.

Hank33
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zoulas wrote:
If you trust what it says. It could be a rewrap. You can try measuring the IR and see how it matches the spec sheets.

Ok thanks but I don't wanna open the battery pack to measure. Actually I found their site label and it does say Samsung 35E so I'm pretty sure it's the 35E one.

 

                                                                                             

Sirstinky
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35E’s are often copied, so you won’t know unless you measure the cells (dimensions, weight, internal resistance, capacity) and compare it against the data sheet. If this is a reputable manufacturer, then they may be trustworthy.

Hank33
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Sirstinky wrote:
35E’s are often copied, so you won’t know unless you measure the cells (dimensions, weight, internal resistance, capacity) and compare it against the data sheet. If this is a reputable manufacturer, then they may be trustworthy.

Okay I’ll have to think about it. Thanks again. Smile

 

                                                                                             

chops728
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What are you wanting to do —use as a pack or repurpose the cells

Hank33
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chops728 wrote:
What are you wanting to do —use as a pack or repurpose the cells

I’m using it as a pack only. They told me their battery’s that come in only use LG or Samsung. I just wanted to be doubly sure. Smile

 

                                                                                             

chops728
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to get those kind of specs it must have 108 — 35Es in it —- must of been pricey

Hank33
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Yeah quite a few of em in the pack huh. Takes a while to charge em too. But I always charge to 80% anyways so not that bad.

The 60V 21aH 3000w (5A) goes for around $500 USD at aliexpress. It's not that bad I guess. It's gone down in price recently.smile

 

                                                                                             

chops728
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I’ve been testing and Repurposing a ton of cells lately —from most of my testing I’d charge to around 90% and only drain down to around 30% —your cycle life should double up

51volt —- 65 volt range

Hank33
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chops728 wrote:
I’ve been testing and Repurposing a ton of cells lately —from most of my testing I’d charge to around 90% and only drain down to around 30% —your cycle life should double up

51volt —- 65 volt range

Hey thanks for the tip and yes I’ve been doing the 80% to 90% charging way. I always charge to 80% though and for longer runs at 90%. About once a month I’ll go 100%. Hmmmm maybe next time if I repurpose, I can still use em for flashlights! Cash

 

                                                                                             

chops728
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You’d be surprised how many are still good in your old Pack — sometimes just the Electronics in the pack go bad

bilakos10
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As said, you can never be sure about who manufacturers a certain cell, unless you measure its exact specifications (and even that can be faked to a certain degree).
Provided that the seller is trusted, I would just roll with it Big Smile

funwok
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Yeah, agree with bila here. When it comes to batteries a lot of shenanigans are in play. If you can trust your seller then good for you, but remember only because the package says something doesn’t mean the content will be like stated. Wink

See the good old Ultrafire 5000mAh batteries: https://lygte-info.dk/review/batteries2012/UltraFire%20TR18650%205000mAh...