RC India
Welcome Guest, please login or register.
 
Pages: [1] 2  All   Go Down
0 Members and 1 Guest are viewing this topic. Topic Tools Topic Tools 
Read
« on: October 28, 2014, 10:32:39 PM »
sooraj.palakkad
with eyes in sky
Heli Lover
Forum Hero

*****

Reputation Power: 21 
sooraj.palakkad barely matters.sooraj.palakkad barely matters.
Offline Offline

City: Palakkad
State: Kerala
RC Skills: Expert
Posts: 2058
Join Date: Aug, 2014

SPN




 
                              I received my first Radio system from Arun.sreelakam, A few days back. It is a Flysky FS-T6 , This transmitter runs on 8 AA cells .
So this transmitter either need 8 AA size NiMh or Alkaline Cells Or 3S transmitter LiPo pack.
I was in a hurry to get this working , And while trying to search for a suitable battery pack for the transmitter, I found there are very few that fits in transmitter the Battery bay is Length wise bigger but Height wise It Only have 15mm .

                        As I don't really like off the shelf solutions for bigger price, I decided to make my own LiPo batter pack.
                        For that I used Old mobile phone batteries, I have a few lying around - And I selected Three Identical ones, BL-4C battery of nokia phones is the best because they are very thin.
And the BL-4C duplicate only costs 80/- For new one.

 As the battery pack making is already finished I am afraid I can't upload step by step Photos, How ever for this purpose only I will make another battery pack and will post pictures along.....Stay tuned  Hats Off
Logged

RC Hobbyist and an Aerial Cinematographer..
 

Read
« Reply #1 on: October 28, 2014, 10:40:00 PM »
akhilzid
Heli Lover
Forum Hero

*****

Reputation Power: 5 
akhilzid has no influence.
Offline Offline

City: Ernakulam
State: Kerala
RC Skills: Advanced
Posts: 541
Join Date: Sep, 2014



if you are buying try bl-5c, this one have more mah than bl4c
Logged
 

Read
« Reply #2 on: October 28, 2014, 10:46:11 PM »
sooraj.palakkad
with eyes in sky
Heli Lover
Forum Hero

*****

Reputation Power: 21 
sooraj.palakkad barely matters.sooraj.palakkad barely matters.
Offline Offline

City: Palakkad
State: Kerala
RC Skills: Expert
Posts: 2058
Join Date: Aug, 2014

SPN



Hi, Akhil eatta, I haven't baught any thing I just used batteries lying around !!
Why BL-4C ? , tht's because the total size is smaller than what is that of BL-5C , Infact I tried BL-5c stacked up and found out it doesn't fit inside the battery bay of My FS-T6 as it have a single row battery bay, But if the radio has double raw battery bay, I could have used any battery I like.

And guess what, the existing pack with BL-4C (700maH)  Itself gives more than 3 Hrs, continues run.  !!!!!!!
Logged

RC Hobbyist and an Aerial Cinematographer..
 

Read
« Reply #3 on: October 28, 2014, 11:08:41 PM »
akhilzid
Heli Lover
Forum Hero

*****

Reputation Power: 5 
akhilzid has no influence.
Offline Offline

City: Ernakulam
State: Kerala
RC Skills: Advanced
Posts: 541
Join Date: Sep, 2014



yes yes anyway good if you have batteries already, in my old fs-ct6b(is single row 8 X AA) used BP-6M in 2P3S config  and a little tight but fit. gave me 2400Mah.
Logged
 

Read
« Reply #4 on: October 28, 2014, 11:22:39 PM »
sooraj.palakkad
with eyes in sky
Heli Lover
Forum Hero

*****

Reputation Power: 21 
sooraj.palakkad barely matters.sooraj.palakkad barely matters.
Offline Offline

City: Palakkad
State: Kerala
RC Skills: Expert
Posts: 2058
Join Date: Aug, 2014

SPN



I will also try giving another 3S pack in parallel, there is a lot of space in lengthwise !!!
Logged

RC Hobbyist and an Aerial Cinematographer..
 

Read
« Reply #5 on: October 29, 2014, 12:05:28 AM »
KALYANPRODHAN
Global Moderator
Forum Hero

*****

Reputation Power: 17 
KALYANPRODHAN has no influence.
Offline Offline

City: Kolkata
State: West Bengal
RC Skills: Intermediate
Posts: 1584
Join Date: Jul, 2010

Information sharing improves knowledge of both.



The duplicate BL4C or BL5C are infact LiPO instead of original Li-ion. The C rating is more than 3C for duplicate but original Li-ion is not more than 2C Discharging the cell using Transmitter is no problem (As without RF Power Module). But charging through high current charger may ruin the cell pack. Just take a little bit caution.

And surely you have removed the circuits inside cell and connect/solder directly to battery terminals. Otherwise balance charger may not sense proper during charging. If you are using separate 12 volt adapter for balance charger, use an 500mA 12 volt transformer based charger for safety.
If you have infra-red thermometer, please check temp diff of the cell pack first during charging with the charger set up you are using. If temp rise 1.5 - 2 OC after 5 minute of charging, you can use the charger but if the temp rise is higher, you have to be cautious, otherwise the life of the cell pack be less.

Waiting to here from you about result.
« Last Edit: October 29, 2014, 12:31:00 AM by KALYANPRODHAN » Logged

We have to unite and to prove ourself to make indigenous products as well as marketing / Canvasing them. I'm sure we must achieve success if we try unitedly.
 

Read
« Reply #6 on: October 29, 2014, 12:11:47 AM »
sooraj.palakkad
with eyes in sky
Heli Lover
Forum Hero

*****

Reputation Power: 21 
sooraj.palakkad barely matters.sooraj.palakkad barely matters.
Offline Offline

City: Palakkad
State: Kerala
RC Skills: Expert
Posts: 2058
Join Date: Aug, 2014

SPN



T
The duplicate BL4C or BL5C are infact LiPO instead of original Li-ion. The C rating is more than 3C for duplicate but original Li-ion is not more than 2C Discharging the cell using Transmitter is no problem (As without RF Power Module). But charging through high current charger may ruin the cell pack. Just take a little bit caution.
Waiting to here from you about result.

Thanks for new knowledge and the suggestions,
Of course I have removed the extra circuitry from battery.
It has been a week since I made this pack ,and I have added balance port also. But not yet tried charging this pack, as the battery voltage hasn't gone down 11.9 yet!!

I don't have an infrared thermometer ....
Logged

RC Hobbyist and an Aerial Cinematographer..
 

Read
« Reply #7 on: October 29, 2014, 12:36:28 AM »
KALYANPRODHAN
Global Moderator
Forum Hero

*****

Reputation Power: 17 
KALYANPRODHAN has no influence.
Offline Offline

City: Kolkata
State: West Bengal
RC Skills: Intermediate
Posts: 1584
Join Date: Jul, 2010

Information sharing improves knowledge of both.



Overcharging beyond rated rate will generate heat and can be sensed by hands too.. after 10-15 minutes even if you use balance charger. Balance charger will drops the charging current after it attains full charge voltage. So overheat due to overcharge will not occur. But charging with over-current may generate heat even if the cell pack have not fully charged and attains it's voltage for each cell. So don't worry...
Logged

We have to unite and to prove ourself to make indigenous products as well as marketing / Canvasing them. I'm sure we must achieve success if we try unitedly.
 

Read
« Reply #8 on: October 29, 2014, 12:45:07 AM »
akhilzid
Heli Lover
Forum Hero

*****

Reputation Power: 5 
akhilzid has no influence.
Offline Offline

City: Ernakulam
State: Kerala
RC Skills: Advanced
Posts: 541
Join Date: Sep, 2014



recomended charging current for BL-4C is 350ma, they use charger of 450ma and regulated. according to nokia service manual
Logged
 

Read
« Reply #9 on: October 29, 2014, 12:47:18 AM »
sooraj.palakkad
with eyes in sky
Heli Lover
Forum Hero

*****

Reputation Power: 21 
sooraj.palakkad barely matters.sooraj.palakkad barely matters.
Offline Offline

City: Palakkad
State: Kerala
RC Skills: Expert
Posts: 2058
Join Date: Aug, 2014

SPN



Thanks for the Info, I will keep that in mind.
Logged

RC Hobbyist and an Aerial Cinematographer..
 

Read
« Reply #10 on: October 29, 2014, 01:03:12 AM »
KALYANPRODHAN
Global Moderator
Forum Hero

*****

Reputation Power: 17 
KALYANPRODHAN has no influence.
Offline Offline

City: Kolkata
State: West Bengal
RC Skills: Intermediate
Posts: 1584
Join Date: Jul, 2010

Information sharing improves knowledge of both.



But just open any genuine NOKIA charger used for cellphone having BL4C of BL5C.
Reverse engineer the circuitry. You will laugh that the charger will be 500-800mA Capacity and the diode is of 1A (sometime it is glass-case fast diode. 0.5C charging is optimum for Li-Ion battery. But LiPO are little bit different.
Logged

We have to unite and to prove ourself to make indigenous products as well as marketing / Canvasing them. I'm sure we must achieve success if we try unitedly.
 

Read
« Reply #11 on: October 29, 2014, 01:21:40 AM »
akhilzid
Heli Lover
Forum Hero

*****

Reputation Power: 5 
akhilzid has no influence.
Offline Offline

City: Ernakulam
State: Kerala
RC Skills: Advanced
Posts: 541
Join Date: Sep, 2014



checked before through my old 1100 charging terminals that ll be always below 400ma using genuine charger. if you want samples i ll take pics and send you tomorrow. and the over powered chargers are the main reason for bulging of these batteries.
Logged
 

Read
« Reply #12 on: October 29, 2014, 01:55:51 AM »
v2 eagle
AK
Plane Lover
Forum Hero

*****

Reputation Power: 12 
v2 eagle has no influence.
Offline Offline

City: chennai
State: Tamil Nadu
RC Skills: Beginner
Posts: 1178
Join Date: Jun, 2013



Kalyan sir,

Aint that too much work fiddling with cell phone batteries when there is good alternative like normal lipo for cheaper cost available.
http://www.rcbazaar.com/products/1328-wolfpack-900mah-25c-111v.aspx
this one seems to fit the case at just 3cm wide. after removing all those casing you can save a few mm. a zippy 100mah 3S will fit perfectly after removing the outer jacket and exposing the bare cells. best thing about lipo in TX is that you dont need to worry about carrying another specific charger. I know its fun to hack things and have played a lot with lipos. but wouldnt take a chance with TX.

Ashok.P
Logged

 

Read
« Reply #13 on: October 29, 2014, 02:19:02 AM »
akhilzid
Heli Lover
Forum Hero

*****

Reputation Power: 5 
akhilzid has no influence.
Offline Offline

City: Ernakulam
State: Kerala
RC Skills: Advanced
Posts: 541
Join Date: Sep, 2014



But the thickness of the whole battery you provided is 2.8CM and For a AA battery is less than 1.5CM so we cant close cover.

and the cells may fit like in the picture

bat.jpg
Re: DIY - Transmitter battery pack from mobile phone batteries.
* bat.jpg (8.69 KB, 373x198 - viewed 2039 times.)
Logged
 

Read
« Reply #14 on: October 29, 2014, 03:02:25 AM »
v2 eagle
AK
Plane Lover
Forum Hero

*****

Reputation Power: 12 
v2 eagle has no influence.
Offline Offline

City: chennai
State: Tamil Nadu
RC Skills: Beginner
Posts: 1178
Join Date: Jun, 2013



Wouldnt recommend splitting lipos. keeping them as is doesnt seems to fit the case. well, i remember seeing a 800mah turnigy lipo with my friend, that sure is slimmer than a zippy. will test and get back.

Ashok.P
Logged

 

Read
« Reply #15 on: October 29, 2014, 03:22:35 AM »
akhilzid
Heli Lover
Forum Hero

*****

Reputation Power: 5 
akhilzid has no influence.
Offline Offline

City: Ernakulam
State: Kerala
RC Skills: Advanced
Posts: 541
Join Date: Sep, 2014


Re:

I too not recommend to Split lipos.(But i did Many times)

I think the turnigy 800 mah lipo will be slimmer, but can't be slim as 1.5CM, because in 3s pack each cell must be less than 5mm thick.
please correct me I'm wrong.
Logged
 

Read
« Reply #16 on: October 29, 2014, 06:41:12 AM »
KALYANPRODHAN
Global Moderator
Forum Hero

*****

Reputation Power: 17 
KALYANPRODHAN has no influence.
Offline Offline

City: Kolkata
State: West Bengal
RC Skills: Intermediate
Posts: 1584
Join Date: Jul, 2010

Information sharing improves knowledge of both.



Oh, you done perfectly and on right way... GRATE
Logged

We have to unite and to prove ourself to make indigenous products as well as marketing / Canvasing them. I'm sure we must achieve success if we try unitedly.
 

Read
« Reply #17 on: October 29, 2014, 07:04:49 AM »
sooraj.palakkad
with eyes in sky
Heli Lover
Forum Hero

*****

Reputation Power: 21 
sooraj.palakkad barely matters.sooraj.palakkad barely matters.
Offline Offline

City: Palakkad
State: Kerala
RC Skills: Expert
Posts: 2058
Join Date: Aug, 2014

SPN



And this is why guys I have to mod my own battery pack !!!
But now I found Turnigy nano tech 1450maH or somewhat pack is suitable for this transmitter ... But I have no any plans to change my battery pack, > It have been a week since I put the modded batterypack in my transmitter with fullcharge, and it still counts 11.9V. !!
Logged

RC Hobbyist and an Aerial Cinematographer..
 

Read
« Reply #18 on: October 29, 2014, 11:08:04 PM »
sahilkit
LOVE MICRO RC
Plane Lover
Forum Hero

*****

Reputation Power: 18 
sahilkit has no influence.
Offline Offline

City: Hyderabad
State: Telangana
RC Skills: Beginner
Posts: 1533
Join Date: Mar, 2009

MICROSTAR 2000



I had to do similar mod because my radio battery pack died, 2S @ 4000mah Li-ion with on/off switch for charging and connection. Works Great  Grin
Logged

Today might be a great and wonderful day. It depends on you.
 

Read
« Reply #19 on: October 29, 2014, 11:27:50 PM »
sooraj.palakkad
with eyes in sky
Heli Lover
Forum Hero

*****

Reputation Power: 21 
sooraj.palakkad barely matters.sooraj.palakkad barely matters.
Offline Offline

City: Palakkad
State: Kerala
RC Skills: Expert
Posts: 2058
Join Date: Aug, 2014

SPN



2S? which is your transmitter?
Logged

RC Hobbyist and an Aerial Cinematographer..
 

Read
« Reply #20 on: October 30, 2014, 07:12:48 AM »
sahilkit
LOVE MICRO RC
Plane Lover
Forum Hero

*****

Reputation Power: 18 
sahilkit has no influence.
Offline Offline

City: Hyderabad
State: Telangana
RC Skills: Beginner
Posts: 1533
Join Date: Mar, 2009

MICROSTAR 2000



Sanwa SD-10G
Logged

Today might be a great and wonderful day. It depends on you.
 

Read
« Reply #21 on: October 30, 2014, 03:39:56 PM »
sooraj.palakkad
with eyes in sky
Heli Lover
Forum Hero

*****

Reputation Power: 21 
sooraj.palakkad barely matters.sooraj.palakkad barely matters.
Offline Offline

City: Palakkad
State: Kerala
RC Skills: Expert
Posts: 2058
Join Date: Aug, 2014

SPN



Gr8
Logged

RC Hobbyist and an Aerial Cinematographer..
 

Read
« Reply #22 on: October 30, 2014, 04:58:59 PM »
allthatido
Plane Lover
Forum Hero

*****

Reputation Power: 11 
allthatido has no influence.
Offline Offline

City: Mumbai
State: Maharashtra
RC Skills: Intermediate
Posts: 910
Join Date: Apr, 2009

Happy is a man whose hobby is his profession



Pics ?
Logged

 

Read
« Reply #23 on: October 30, 2014, 07:40:26 PM »
sooraj.palakkad
with eyes in sky
Heli Lover
Forum Hero

*****

Reputation Power: 21 
sooraj.palakkad barely matters.sooraj.palakkad barely matters.
Offline Offline

City: Palakkad
State: Kerala
RC Skills: Expert
Posts: 2058
Join Date: Aug, 2014

SPN



Will upload soon.........
Logged

RC Hobbyist and an Aerial Cinematographer..
 

Read
« Reply #24 on: November 03, 2014, 03:11:31 PM »
sooraj.palakkad
with eyes in sky
Heli Lover
Forum Hero

*****

Reputation Power: 21 
sooraj.palakkad barely matters.sooraj.palakkad barely matters.
Offline Offline

City: Palakkad
State: Kerala
RC Skills: Expert
Posts: 2058
Join Date: Aug, 2014

SPN



Pics uploaded.......

Img00105.jpg
Re: DIY - Transmitter battery pack from mobile phone batteries.
* Img00105.jpg (26.58 KB, 800x600 - viewed 1968 times.)
This post has 3 more images(s)/attachment(s). Please login or register to view them.
Logged

RC Hobbyist and an Aerial Cinematographer..
 

Pages: [1] 2  All   Go Up
Jump to:  

Related Topics
Subject Started by Replies Views Last post
how to connect wires to a mobile battery
Batteries and Chargers
teja 13 11029 Last post May 21, 2011, 07:39:55 PM
by vishwasvm
Homemade lipo battery pack from cellphone batteries?
Batteries and Chargers
Bilal 6 9287 Last post May 01, 2011, 11:37:26 AM
by vineet
MOBILE PHONE as FPV Tx and Rx ????
RC General Topics
jj4u 7 4715 Last post February 09, 2015, 09:18:26 AM
by sundaram
5.8 GHz OTG FPV Receiver For Android Mobile Phone
Radios and Receivers
Dharmik 4 4809 Last post May 05, 2017, 09:57:57 AM
by Swapnil
Can I use li- ion mobile battery for my rc aircraft?
RC India Forum
mukulmw 5 3328 Last post May 08, 2017, 08:23:23 PM
by K K Iyer