hello friends

saw some videos on youtube and made my own diy lipo from lenovo r61 dead laptop battery

battery series in

panasinic CGR18650DA
details are as follows
http://c550715.tootoo.com/product-6261263/cgr18650da-panasonic-18650-2-45ah-3-7v-li-ion-battery-cell.html


here is the build idea


watch this
guy claims that it gives more then an hour of flight time with NCR18650B batteries capacity is 3450 mAH

my diy battery is in charging currently
i will keep you posted with how much flight time i got from it

here is 1 hour flight of NCR18650B



NOTE:-please friends if sombody have dead laptop batteries let me know. if my DIY battery is good to go then i am willing to buy dead lappy batteries

or you can try this for yourself it will save you lot of money

here are batteries
http://www.banggood.com/2PCS-NCR18650B-3400mAh-3_7V-Gold-Plating-Rechargeable-Li-ion-Battery-p-940444.html

NOTE:-some people doubt power output of these batteries . and according to my research over internet they are save for flying approx 1 meter length planes dont use it with more then 20-30 A ESC it will not deliver that kind of power but i must say it will give a long FPV flight for which i made this pack  


many many thanks to my friend hitesh who gave me his lappy battery so that i can complete my projecj

Wow That's a Really Good Idea. Really Appreciate That.
Regards,
Aman.

i think it will work currently battery voltage is around 9.5 and almost 10 amp current output

i will post new levels after fully charging the lipo

i am happy to inform all of you that the battery works pretty well it flew great my plane is flying wing speedster pro from vortex-rc ....

as compared to 2200 mah lipo it is light weight and small size and of 2450mah

one of the only flaw is its c rating is not parallel to lipo it delivers about 75-80 % of a 20c-30c lipo
but still it is good enough for flying and best for fpv

enjoy make diy batteries from laptop lipo and save money

More info like flight time ,end voltage, c rating,mah.and nice battery.
JK

till now i did a flight of 20min with it and battery was still in good charge
did not drained it to the end voltage still now
it give 10A current checked it and i think c rating is not hight 15-20c max and it gives constant discharge i dont think there is a burst current rating in these batteries because of obvious reason that they are made for laptop and not for rc

my model is a flying wing it requires less power glide ratio is very good 

you anyone wants to add an over discharge protection circuit to this battery pack then here is the link



but i think a low voltage alarm will suffice for park flying
enjoy