I had a quick question. Would it be fine to use a basic Bluetooth speaker charging circuit for a larger battery? The original battery is a 3.7v Li-Po at 300 mAh and the one I want to use is a 3.7v Li-Po at 4000mAh. Would it charge properly and would it charge to the max? Can I use the leads from the larger battery or would I need new ones?

 

LiPO chargers, if well designed, charge a constant current until battery reaches
a specifc V, then a topping charge at fixed V.

https://batteryuniversity.com/learn/article/charging_lithium_ion_batteries

https://rogershobbycenter.com/lipoguide

So answer to your question depends on how well designed is the charger.
Is it cut for general chemistry or a specific cell type/array.

LiPO cells have very active chemistry, so to do all this safely they have to
be designed to handle the cell you are working with.


Regards, Dana.

 

LiPO chargers, if well designed, charge a constant current until battery reaches
a specifc V, then a topping charge at fixed V.

https://batteryuniversity.com/learn/article/charging_lithium_ion_batteries

https://rogershobbycenter.com/lipoguide

So answer to your question depends on how well designed is the charger.
Is it cut for general chemistry or a specific cell type/array.

LiPO cells have very active chemistry, so to do all this safely they have to
be designed to handle the cell you are working with.


Regards, Dana.

I believe it’s just for general chemistry because it’s a cheapo speaker and the battery it charges isn’t anything special. Thanks for your reply!!

Sincerely,
Ken Thom

 

It will probably work ok, but make take 10 times longer to charge..

 

It will probably work ok, but make take 10 times longer to charge..

Thanks will keep that in mind, it doesn’t use much charge anyways and it’s not something I’m always using so the longer charge isn’t going to be a problem. Thanks again