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[mukulmw]

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Can we use Li-ion mobile battery for our rc airplane?If no then what is problem with that?
It would really save my money buying lipo battery and charger.

[Harish Nagisetty]

There is really no difference between "Li-Po" and "Li-Ion" as we know them. The difference between batteries for mobile phone applications and for RC applications is in the discharge rate. Phones don't need as much power as planes.

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[Partha Dubey]

The idea will not work on normal models because of the required discharge rate 'C' as read on batteries. The difference is in the chemistry of the batteries. Lipo batteries have a layer of polymer gel in between the electrode sheets to enable higher discharge. If the same is done with li-ion batteries the model will not get enough power moreover it might prove dangerous! So only go for good lipo and good balancer chargers.

[Imperial fire]

It depends on how much power ur motor is gonna draw....if it's a really small brushless motor...then maybe u can make a indoor flier...but always better to get a lipo..you can get a decent 2s  700 mah for 500..

[hellfire]

The battery chemistry in the phones and tablets,laptops are not designed for high discharged rate.They will explode or catch fire.

You will need batteries that are of IMR chemistry used in Tesla cars and cordless power tools.These have very low IR and designed for continous high discharge applications.

[K K Iyer]

Can we use Li-ion mobile battery for our rc airplane?If no then what is problem with that?
It would really save my money buying lipo battery and charger.

@mukulmw,
Note that this was your first post.
So, first of all, welcome to this hobby and this forum.

Several members have posted answers to your query mentioning 'discharge rate'

I don't know your age or your exposure to science, but to get a meaningful and satisfying answer to your doubt, and to get the fundamentals clear, try to answer (or find the answers) to the following questions.
(I guess you are aware of volts, amps, watts, ohms, but perhaps not of mah capacity, or discharge rate)

1. How many watts is a ceiling fan? How many amps does it draw? (At 220 volts)
2. How many watts is a car starter motor? How many amps does it draw? (At 12 volts). What is the size/weight of the battery? How thick are the wires?
3. How many watts does a cellphone need? Voltage? Amps?

Then compare with a typical small RC airplane BLDC motor
A small motor of less than 30mm dia, weighing say 40gms, may be rated for perhaps 240watts. Meaning it will draw 20 amps at 12volts.
So your battery has to be capable of delivering 20 amps (compare with cellphone)
To deliver 20amps for an hour needs 20 amp hours capacity, or 20,000mah
2000mah capacity will deliver 20 amps for 6 minutes.
Since we do not usually discharge below 50%, it will last for 3 minutes
However, since the average draw during a flight may only be 50%, it will last 6 minutes.

Now you can check the max amps and duration possible with a cellphone battery!
Hope this was not toooo much
Regards