old tablet Li-ion battery as Powerbank?

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Pistolero_1

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Dec 4, 2015
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This is a small DIY project that i want to make.I got a working Li-ion battery (5000 mah) from the old tablet, i wonder if i could make a powerbank for my phone with that battery. If you know how please reply!
 
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Ralston18
Full disclaimer upfront: Do not know how.

That said if I had to do that there would be two requirements:

1) I would need to build the necessary circuitry to recharge the working Li-ion battery from a power source be it a local wall outlet or maybe USB.

2) I would need to build the necessary circuitry to recharge the phone from the Li-ion battery.

In both cases would need to map and match the required voltages, amps, etc. with the necessary circuitry to indicate status, prevent overcharging etc..

It should be fairly easy to find schematics on the internet for such circuits. Especially if you are an electronics hobbyist or EE type and can read the circuits. All you would be doing thereafter is applying the circuitry for a...
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Ralston18

Ralston18

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Oct 11, 2014
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Full disclaimer upfront: Do not know how.

That said if I had to do that there would be two requirements:

1) I would need to build the necessary circuitry to recharge the working Li-ion battery from a power source be it a local wall outlet or maybe USB.

2) I would need to build the necessary circuitry to recharge the phone from the Li-ion battery.

In both cases would need to map and match the required voltages, amps, etc. with the necessary circuitry to indicate status, prevent overcharging etc..

It should be fairly easy to find schematics on the internet for such circuits. Especially if you are an electronics hobbyist or EE type and can read the circuits. All you would be doing thereafter is applying the circuitry for a specific purpose.

Most of the work is probably in the design effort and getting the components together.

Even being given a "how to" or circuit plan involves some risk.

If the battery and phone that you have are expendable go for it. Breadboard or solder up the circuits and try.

Could be a fun learning project. Just be sure you can truly risk the phone and/or battery.

 
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