Modify Phone Battery: Is It Safe?

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Modifying a phone by using batteries from stockpiled devices is generally considered unsafe and impractical. Connecting batteries in parallel requires them to have the same chemistry and similar charge/discharge histories, which is difficult to verify. Even if the batteries are the same model, it's recommended to consult the manufacturer before proceeding. Many experts advise against this practice due to potential safety hazards, including the risk of fire. Overall, modifying a phone with mismatched or old batteries is not advisable.
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I want to modify my phone by using one of the batteries from phones I have stockpiled over the years and wiring them together. I doubt I have a battery that matches the battery my phone has, so I will have to check. Assuming I have the correct battery, is this a good idea?

By the way I have soldered batteries together before but I want to make sure it's fine since my phone is expensive, at least by my standards
 
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Stephenk53 said:
I want to modify my phone by using one of the batteries from phones I have stockpiled over the years and wiring them together. I doubt I have a battery that matches the battery my phone has, so I will have to check. Assuming I have the correct battery, is this a good idea?

By the way I have soldered batteries together before but I want to make sure it's fine since my phone is expensive, at least by my standards
Doesn't sound like a good idea. If you are intending to connect the batteries in parallel, that probably will not work. Only batteries with certain chemistries and very similar charge/discharge histories can be paralleled.
 
Do you know how I could check if the batteries have a chemistry that work in parallel? As for charge/discharge histories, could I instead get two new batteries or two equally old batteries and use them instead of my current battery. Again assuming the batteries are the same as the one I currently use
 
Stephenk53 said:
Do you know how I could check if the batteries have a chemistry that work in parallel? As for charge/discharge histories, could I instead get two new batteries or two equally old batteries and use them instead of my current battery. Again assuming the batteries are the same as the one I currently use

I would say the only two batteries that could be successfully paralleled would be if they are the same model and both brand-new. Even then, I would contact the manufacturer to ask if they recommend this.
 
Stephenk53 said:
Do you know how I could check if the batteries have a chemistry that work in parallel? As for charge/discharge histories, could I instead get two new batteries or two equally old batteries and use them instead of my current battery. Again assuming the batteries are the same as the one I currently use
What could possibly go wrong? Go for it!

http://l7.alamy.com/zooms/de6e99f55...burning-phone-in-jeans-back-pocket-eb1pyd.jpg
close-up-of-burning-phone-in-jeans-back-pocket-eb1pyd.jpg
 

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Stephenk53 said:
Do you know how I could check if the batteries have a chemistry that work in parallel?
You may want to go to the Battery University.
 
Stephenk53 said:
I want to modify my phone by using one of the batteries from phones I have stockpiled over the years and wiring them together.
Care to tell us some phone types?
Sometime it is possible: but in general, it is futile and dangerous. So without any details, it is a big NO-NO.
 
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