RC India

Just wanted to know where I can get a good battery for my sky surfer as two LIPO  11.1 v  :banghead: :banghead:batteries I purchased got damaged in two months.

If i may ask, How did it got damaged? :headscratch:

Dont knoew exactly  when I put it to charging it shows voltage error and does not charges.

Hmm, It's always advisable to learn and grab as much as knowledge as possible about various RC Components before flying any model
(Infact even before buying any model)

The worst thing to do is to 'not being able to know what happened'
These are not toys and one of these 'not being able to know what happened' can result in some serious situation that you never want to get into.
Have you watched any video, etc to understand LiPo's?

There are a lot of reasons due to which a LiPo can get damaged, the most common of it is letting the voltage of any of the cells go below 3 volts.
Lithium Polymer batteries (No matter which brand) are quite different than Lithium Ion batteries as once the voltage on any of it's cell goes below 3 volts than a chemical reaction takes place in it making that particular cell permanently unusable and unchargeable.

LiPo Buzzer alarms works best in that case as it gives you an alarm as soon as voltage on any cell of a LiPo goes below let's say 3.7 volts (you can customize this threshold)

So if the damage happened after letting the voltage drop or if after letting the LiPo stay connected to the model for prolonged amount of time, etc then this need to be optimized first before finding any new LiPo as no matter which brand, all have the same characteristics when it comes to discharging a cell below 3.0 volts.

I think this is a big handicap to electric planes with lipos are there not more smarter batteries in the market.

@marvic, i think its a input voltage problem not the battery problem.  :headscratch:

wht cld have gone wrong while charging..I do have a tester can check all the cells voltage. I tried to do a balance charging with 11.1 volts and 2.2 A.

which charger are you using ??

I am using  ....Imax b6 ac rc lipo charger /1-6 cells 22.2v Balance charger....http://www.alibaba.com/product-gs/1565909530/Imax_b6_ac_rc_lipo_charger.html (http://www.alibaba.com/product-gs/1565909530/Imax_b6_ac_rc_lipo_charger.html)

And power adopter??

if you have access to multimeter, chek the voltage of each cell. if it reads somewhere around 2.5-3volt/cell, its fine i would say. if below that, you can hack it to skip the particular cell and use it as a 2S battery.

http://www.youtube.com/watch?v=uchFUiXPdQU# (http://www.youtube.com/watch?v=uchFUiXPdQU#)
try the above mentioned method if the charger is showing LOW VOLTAGE warning.worked for me couple of times.

Thank you so much....I have exactly the same problem but my questions is how long do we have to charge like this.

one minute and then stop it and change the settings to lipo and charge it

I am looking for a good Lipo battery for my sky surfer burned two LIPOS WOLF Pack batteries just two flights with them...wolf pack battary discharge is heavy and they get worn out pretty soon. Can any one suggest where some good batteries and where they can be bought.

specification
• Capacity: 2200mAh
• Voltage: 11.1v
• Continuous Discharge Rate: 25C (Burst 35C)

Sorry I ma unable to get your message.

Maveric

Check this out

http://stores.ebay.in/Indian-Hobby-Shop/3Cell-LiPo-/_i.html?_fsub=7033990013&_sid=1125855133&_trksid=p4634.c0.m322 (http://stores.ebay.in/Indian-Hobby-Shop/3Cell-LiPo-/_i.html?_fsub=7033990013&_sid=1125855133&_trksid=p4634.c0.m322)

get the ind power stuff from rcdhamaka it seems have got lots of positive reviews

Here...
http://www.rcdhamaka.com/index.php?main_page=index&cPath=94&zenid=vee6lge4ba47bjm1rn5f7vql21 (http://www.rcdhamaka.com/index.php?main_page=index&cPath=94&zenid=vee6lge4ba47bjm1rn5f7vql21)

Thank you all for your suggestions...

[Admin Note] Please do not start multiple threads on the same topic.  Merged. And post in the right boards.

my suggestion is if u wanna know where the problem is then dissect ur battery,and check it with multimeter,will be a good experience but with very careful

The balance connector brings out terminals from your battery. You can very carefully insert paper clips in the balance connectors and connect them to the multimeter to read your individual cell voltage without dissecting the battery. Whatever happens, dont shortcircuit the paper clips. Use a small piece of cardboard between the clips to reduce risk of shortcirctuit

Usually the problem with LiPo is letting the voltage drop below 3 volts on any of the cells.
Instead of the focus being 'Avoiding similar situation in future', the focus is on 'how to fix this LiPo'

Well LiPo have more advantages for the RC community than the issues
If there's a problem then look for a solution to that issue and you'll never have a problem again.

Well, you might be able to fix this LiPo but then you'll damage it (or the other one) again later.
I would get myself a LiPo insurance viz. LiPo Alarm

Once you get a LiPo Alarm and you still need a High Quality LiPo then get yourself a Turnigy Nano-Tech.

Learn from a mistake, learn from a loss. That's the way to enjoy this wonderful hobby :thumbsup: