hi all i m in need of power supply for HK eco6 more than 18 volts 3amps,

all though i have an adopter of 12v 1.5 amps but when charging a 3s 2200 mah battery it says "input voltage error"

i figured that if the unit is not getting the same or more than the voltage needed how can it provide it to the output port.

so guys needed help here because no rc store is supplying the same, thanks to all

It's very easy to obtain what you need locally, Mumbai is not a tough place to find electronics I believe.
I have the same charger and faced the same problem. I searched locally and found a solution.

yes thanks but i m searching for a ready to use type

What do you mean by 'ready to use type'? You don't need to assemble an adapter when you buy it locally.

i got your point now, but i have done searching for one SMPS type more than 18 volts 3amps
specially, and was not able to find it, now i think may be i'll search for step down transformer based one....

The ECO6 does not support more than 18volts, why are you looking for one that goes higher ?

There are already threads here about using PC SMPS as power supply or using laptop power supplies or just getting purpose specific power supplies from RC stores... any of these options should work for you.

thanks anwar sir. but lil confusion here is if its a six cell charger so it should be 4.2*6 = 25.2 volts then how can it does not support more than 18 volts

Huh. of course it can give OUT more than 18V (ie. it 25.2V) but t can't take IN more than 18V.

That's the confusion does a chrger have an inverter circuit because In my knowledge no chargers have inverter circuit

May be its an in point for kalyan sir

DC-DC chargers have no inverter. They use a electronic switch-mode DC-DC convertor to change the voltage levels as far as I know . Anyways to charge any battery having any voltage(should be within the capacity of your charger) you only have to make sure that the input power>output power. Suppose you are trying to charge a 14V battery at 3A and you want to use a 10V power supply. Then the power supply should be able to provide atleast 5A (4.2A+losses).
Waiting for Kalyanda's reply

thats a correct theory,
as anwar sir and HK eco6 page also said that it does not take more than 18 volts as input, it looks like i should have a charger of 18 v <8 amps. to charge a 6 cell(25.2 v) 5a lipo.

If you are really into 6s batteries, then investing in a 200+ watt charger is a good idea.  Using a 50W charger (like the one discussed above), you can never really charge a 6s battery at anything over 2A  (25.2V * 2A is already above 50W, and then we have to consider losses).

correct anwar sir and i m searching for it any idea for (as i said above) ready to use type