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My apologies if this is the wrong forum to ask.. But, I would like to DIY a phone case with a built-in additional battery. Preferably Li-Po because they are flat in shape. I don't want to remove my original phone battery. It's new and works well. I just want to take a power bank concept...

That does make sense. But I would also like to evade the soldering if I can. I will think about it and decide which way to go. Either way I am covered now as I know what are the steps to do it ?

DThames thanks so much for your trouble! I will get those cells with the screw on them so that there is no need fo soldering. Everything else should stay as you described. It may not be tiny but it will be safer and easier to make :)

Thank you everyone for your help!! You can't imagine how helpful your replies are! I will most likely be getting a LiFePo4 cell and doing what DThames suggested! Thanks again! This place is a blessing!

96v with 480A means 46Kwh ?? Thats a lot of power! Thanks for explaining. I just watched a YT video of someone explaining parallels and series. It seems like some sort of a witchcraft xD but there must be a good reason based in physics and chemistry as to why one increases the voltage and the...

I know how to solder. Not much of a professional at it but I learned it from my grandpa and did it often with him. I can make it fast too. Now when it comes to the LiFePo4 cells they just seem too advanced or am I mistaking? Also do they come in cylindrical form? When i google the LiFePo4 all I...

Sounds like NiMH is a hard no xD hopefully I didn't propose something dangerous there or something like that xD Thanks for your reply! I will keep the battery in its limits under the 4.2v

So I have decided to finally dive in and try to make a tiny system. I am planning on taking either a NiMH or a Li-ion cell. A single cell will probably be enough. Then wire it with a tiny solar charger in order to charge it. Literally trying to make one of those solar power bank chargers that...

Wow those batteries sound incredibly sophisticated! So basically if the battery gets too cold outside it will start heating itself up? Just a quick question.. When you say 2s 4p does that mean you lined up to cells linearly and 4 of such in parallel? I am still very new to the forum and the...

Did you have some more time to do further testing about how this works? It seems very advanced that they added such a complex feature to the batteries.

Thank you everyone for your replies. I thik I get it now.. It was incorrect to assume that everything can be concluded about energy spending by observation of mAh. I am checking out all of the links you posted and further searching everything you wrote. Thanks again for your trouble! This...

I assumed something like that is the case. Turning smaller voltage in a higher voltage must drain the battery in the process too.. Thank you for your input! Now onto further learning. I still don't understand properly the whole KWs. Why do we even use Watts when we could use the capacity of...

Okay so this is probably something extremely obvious for everyone here.. But if I were to build a battery pack of let's say 12v.. How would I power a household device that needs 110v to function. Lets say a hairdryer that is plugged in a regular outlet and spends 1kw of electricity. Would I...

Thanks for sharing that! Its very difficult digesting everything about batteries. There are hundreds of things to understand. Its been a month now and I still trying to learn on and off when I get the time. I am thinking about trying to make the most basic DIY project where i take either NiMH...

Never would have occurred to me. Thanks for the FYI there. So it is basically like a water boiler only its purpose is to supply the pressure. Man you can learn so much on this forum.

Does this mean that the battery has 4 cells in it? You showed 4 values so I am presuming 4 cells? Sorry.. I am still very new to all of this and can't seem to digest it all!

Thanks for clearing that up for me. That goes for all batteries that are generally used for solar purposes?

I am wondering.. Is there any further use for the battery bank that is just old and no longer performs well.. lost its capacity and etc. Can it still be used somewhere usefully for a few years? Like can it be given/sold for some other low end purposes? I remember watching a video from...

Interesting! Thanks for sharing my friend!

Sounds like you did a great job protecting your investment and making sure you get what you needed. But since I am new to this. I have one further question. Do people buy on alibaba because it is cheaper or? I am wondering are there US based sellers and if there are, do they source from alibaba...

Is it a good idea to get LiFePO4 cells from the alibaba and such sites? Aren't there risks of getting fake stuff? I am still a beginner so I am asking..

I hope that they can utilize the enormous funds they have to bring some sort of a breakthrough in the battery field.. Hopefully they don't do it just for greed and money but that's almost impossible not to happen.

I think that it is easily doable with a regular battery charger :)

I wonder how long would it last on a low current drain? Like just using small appliances