RC India

RC Models => Electric Planes => Topic started by: Mehul Anand on June 21, 2018, 04:34:44 PM

Title: Charging 3s with imax b3..
Post by: Mehul Anand on June 21, 2018, 04:34:44 PM
Hi I have a imax b3 and a 3 s 1000 mah 30C orange lipo, the manual of the lipo says not to charge above 0.5C will the imax b3 supply the same???
Title: Re: Charging 3s with imax b3..
Post by: sanjayrai55 on June 21, 2018, 05:20:44 PM
Recheck the manual. If it does indeed says so, contact the supplier (Robu?) as there is a mistake

You should be able to comfortably charge it at 1 A (1C)
Title: Re: Charging 3s with imax b3..
Post by: Mehul Anand on June 21, 2018, 07:29:15 PM
So for sure the cheap b3 will provide 1C??
Title: Re: Charging 3s with imax b3..
Post by: sanjayrai55 on June 21, 2018, 07:34:29 PM
Check the IMAX manual, not the lipo manual. Or check with the supplier.

Robu says quite clearly this charger is not recommended for anything except field charging; it seems to me the balancing will not be very accurate, thus impacting the LiPo life

Sent from my Moto G (4) using Tapatalk
Title: Re: Charging 3s with imax b3..
Post by: taksh on June 21, 2018, 07:52:19 PM

@Mehul Anand
iMax b3 is wrost charger.  Charger is not a balance charger and i charged my lipo few times and only one cells is fully charged and remaining two cells are not fully charged and charger led is changed to green from red which means cells are fully charged but all cells are not fully charged.
Then I tried to balance with TP4056 using USB and USB was connected with my laptop and my laptop instantly turned off when i connect pins of TP4056 module to lipo.I suggest you to purchase a good and balance charger else you will face same problem.
Checking voltage with low voltage Alaram buzzer is a bad thing because i have 3 buzzer and different buzzer showing different voltages of lipo cells and i am getting same voltage of only one cell and other cells is differ from different buzzer.
I suggest you to not to use iMax b3 charger if you can't balance lipo cells.






Title: Re: Charging 3s with imax b3..
Post by: Mehul Anand on June 21, 2018, 07:56:55 PM
Hmm... What would be a cheap balance charger then
Title: Re: Charging 3s with imax b3..
Post by: taksh on June 21, 2018, 09:10:13 PM
@Mehul Anand
This hobby is expensive not cheap. Set these words in your mind.
I have lost more than Rs.1500 in AliExpress fraud. So, anything can be happen
I am not a person who can tell you about cheap balance charger.
Title: Re: Charging 3s with imax b3..
Post by: Mehul Anand on June 24, 2018, 06:49:33 PM
I checked the Imax b3 with a multimeter for 3s it showed that the b3 had fluctuating voltage between 4.15 v to 4.23 v in each consecutive pins...
And the whole voltage was about 12.6 v so safe to use??
Title: Re: Charging 3s with imax b3..
Post by: sanjayrai55 on June 24, 2018, 07:03:41 PM
I have never used a B3, only a B6, but it does appear that this only charges, not balance accurately. I suggest you check the manual. If it is the case, avoid using this except for occasional field charging. If the LiPo's are unbalanced, their life will be greatly reduced

Sent from my Moto G (4) using Tapatalk
Title: Re: Charging 3s with imax b3..
Post by: Imperial fire on June 24, 2018, 07:50:34 PM
ive used the b3 ...
it does NOT balance correctly... plus takes forever to balance
but it does have an advantage...
you see it charges a battery even if its almost dead.
my original skyrc charger refuses to charge if voltage is too low.   ...so i kinda need both the chargers.
Title: Re: Charging 3s with imax b3..
Post by: Mehul Anand on June 24, 2018, 08:05:56 PM
But I think having above 4v is enough...
Title: Re: Charging 3s with imax b3..
Post by: Imperial fire on June 24, 2018, 08:08:09 PM
its enough yes.. but is it good for the life of a battery to be improperly balanced? i am not so sure. would like to read more about it.
Title: Re: Charging 3s with imax b3..
Post by: Mehul Anand on June 24, 2018, 08:10:42 PM
The actual problem arises when a cell drops voltage below 3.2 v cause it can't power any more so there is a improper power supply...
Alas Li-Fe is better when will it be centralised...
Title: Re: Charging 3s with imax b3..
Post by: Mehul Anand on June 24, 2018, 08:17:52 PM
To discharge my 4 year old turnigy 2s lipo should I just toss it into salt water...
Are there any laws in India regarding throwing lipo's???
Title: Re: Charging 3s with imax b3..
Post by: taksh on June 24, 2018, 08:22:13 PM
@Mehul Anand
There is difference btw dispoing & discharging.
A topic regarding disposing lipo is available in this forum.
And you can also recover low voltage cell using a good charger
Title: Re: Charging 3s with imax b3..
Post by: Mehul Anand on June 24, 2018, 08:23:21 PM
:facepalm: your english is bad @taksh
Title: Re: Charging 3s with imax b3..
Post by: saikat on June 24, 2018, 08:27:03 PM
Yes the Supreme Court delivered a landmark verdict in 1956

The govt of india on the instructions of the ministry of home affairs formed
A special agency for the purpose ..
To be headed by a chief secretary level officer and having monitoring cells in each state.
Title: Re: Charging 3s with imax b3..
Post by: taksh on June 24, 2018, 08:27:54 PM
@Mehul Anand
I know my english. So edit your comment.
I am trying to help u and u said for my english.
Title: Re: Charging 3s with imax b3..
Post by: ambattuhari on June 24, 2018, 10:55:34 PM
At least type English, not english
Title: Re: Charging 3s with imax b3..
Post by: ambattuhari on June 25, 2018, 05:31:40 PM
And there is a spell checker !!!!!!!!!!nobody is using
Title: Re: Charging 3s with imax b3..
Post by: ambattuhari on June 25, 2018, 05:42:28 PM
And, what is the qualification , to be a senior member?
AGE........?
Experience.......?
Joining date...?

OR  Ignorance !
  K.K sir, or Anwar ,must reply,!!l!!!kl.  ????? :banghead:
Title: Re: Charging 3s with imax b3..
Post by: K K Iyer on June 25, 2018, 07:30:30 PM
Quote from: ambattuhari on June 25, 2018, 05:42:28 PM
And, what is the qualification , to be a senior member?
AGE........? Experience.......? Joining date...?
OR  Ignorance !
K.K sir, or Anwar ,must reply,!!l!!!kl.  ????? :banghead:

Ans: NOTA (None Of The Above)  ;D

Quote from Anwar sir's post of 22.2.2010:
Above 250 posts = Senior  and above 500 posts = Forum hero

You can see this thread:
http://www.rcindia.org/rc-india-forum/profile-status/msg14460/#msg14460

Many new entrants to this hobby/forum often feel a compulsion to respond to every thread, without a thought to their own competence/ experience. But with time, they grow out of it.

Many of such compulsive posters are quite an irritant.
But the trick is to avoid showing our irritation in our own responses.

Takes all types to make this world, and not everyone can know 'the englis as she is spoke', eh?

For example, I don't know what is meant by '!!l!!!kl'.  ???
Regards
Title: Re: Charging 3s with imax b3..
Post by: jayeshjain88 on June 27, 2018, 05:34:05 PM
Quote from: Mehul Anand on June 21, 2018, 04:34:44 PM
Hi I have a imax b3 and a 3 s 1000 mah 30C orange lipo, the manual of the lipo says not to charge above 0.5C will the imax b3 supply the same???

Imax B3 has max output of 0.85A.
Our lipo manual recommends 0.5C. Manual also mentions 1C as standard charging current. In an emergency, you can even go upto 2C easily. It's your choice. 1C is absolutely safe though.

But B3 is not good charger. It reduces battery life. We do not wish to sell it. We even discontinued it for some time. But in turn our battery sales also went down. So we had to start selling it again. But we mentioned this issue on the product page. https://robu.in/product/b3ac-compact-balance-charger-2s-3s-lipo/. (We might be loosing some sales but still it is the hot seller, I can't understand why people still buy it)

You can go for https://robu.in/product/skyrc-e3-ac-2s-3s-li-po-battery-charger-v2-original/. Or b6. My personal favourite is b6 mini. SKYRC chargers quality is good. Bit expensive but keeps your battery healthy. So in long run you save lot of money.
Title: Re: Charging 3s with imax b3..
Post by: sanjayrai55 on June 27, 2018, 05:39:53 PM
Quote from: jayeshjain88 on June 27, 2018, 05:34:05 PMImax B3 has max output of 0.85A.
Our lipo manual recommends 0.5C. Manual also mentions 1C as standard charging current. In an emergency, you can even go upto 2C easily. It's your choice. 1C is absolutely safe though.

But B3 is not good charger. It reduces battery life. We do not wish to sell it. We even discontinued it for some time. But in turn our battery sales also went down. So we had to start selling it again. But we mentioned this issue on the product page. https://robu.in/product/b3ac-compact-balance-charger-2s-3s-lipo/. (We might be loosing some sales but still it is the hot seller, I can't understand why people still buy it)



Words of wisdom! Well said Jayesh Bhai. And why people buy it? Because they want cheap, but don't realize that most of the time Cheap = Poor Quality or Lower Specification
Title: Re: Charging 3s with imax b3..
Post by: Mehul Anand on June 28, 2018, 08:34:04 PM
Ok!! so i have decided to buy the b6 it costs 2100...
i don't have the guts to ask my dad so i have a 3 year old maestro rock crawler jr. which was gifted to me (Rs.2000).I am thinking to sell it but the problem is that it doesn't work any ideas?? :???:
i also have a hexbug skate park (Rs.1200) gifted again i will sell it somehow...
Anyone has idea how to fix the crawler??
plz help...
it is not moving...
i need to fix it as it will provide a lot maybe enough to buy the b6... :help: