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Old 02-26-2013, 11:47 PM   #1 (permalink)
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Question Charging multiple batteries at the same time ?

my question is, when charging multiple batteries at the same time do you add the amps? so if I were to be charging 5 300mha batteries what I set my charger to 300mha or 1500mha?
oh yeah and these are 1s 3.7 volt batteries.also if it is 1500 and these are 1 C batteries do I set my charging amperage to.3 or 1.5
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Old 02-27-2013, 04:30 AM   #2 (permalink)
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If you are parallel charging using a "squid" or paraboard, you are correct - add the amperage together for the number of batteries you have connected.

Ex: if you want to charge a single 1s-300mah battery, you would set you charger at 1s (3.7v) and .3 amps for a 1c charge rate, a 2c charge rate would be .6 amps.

Your example of charging five, 1s-300mah batteries at 1c you would set the charger at 1.5 amps.

Here's a real good read: http://www.rchelicopterfun.com/rc-lipo-batteries.html

Post back with any other questions you may have.
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Old 02-27-2013, 10:25 AM   #3 (permalink)
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If I charge 5 300mah batterys do I set the charger to 1500mah at 1.5 amp for 1c?
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Old 02-27-2013, 10:28 AM   #4 (permalink)
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If I charge 5 300mah batterys do I set the charger to 1500mah at 1.5 amp for 1c?
Yes, set the charger to 1.5 amps to charge 5 300mAh battereis at 1C. 3 amps for 2C and so forth.
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Old 02-27-2013, 12:39 PM   #5 (permalink)
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Depending on the manufacturer and how your batteries take it - you can probably charge them safely at 2C or maybe 3C.

I charge 6 nano-tech 300mAh batteries at 2C. So for me: 6 x 300mAh = 1800mAh. 1C = 1.8 A charge rate or 2C = 3.6A charge rate.

Cuts the charge time almost in half and gets me back in the air sooner.
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Old 02-27-2013, 12:57 PM   #6 (permalink)
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Yes I understand the charge rate but do I allso add the total mah? So 5 300mah at one c my amps would be 1.5, but would I set the mah to 1500 or just 300. In other words is it like charging a single 1500mah 1s lipo?
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Old 02-27-2013, 01:04 PM   #7 (permalink)
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Yes I understand the charge rate but do I allso add the total mah? So 5 300mah at one c my amps would be 1.5, but would I set the mah to 1500 or just 300. In other words is it like charging a single 1500mah 1s lipo?
I don't understand the 1500 mAh example. On my iCharger, you set the type of battery, the cell or cells voltage and the charge amperage, .1 amps up to 20 amps. The charger doesn't know if your charging one or six batteries.
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Old 02-27-2013, 01:06 PM   #8 (permalink)
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Default Re: Charging multiple batteries at the same time ?

Exactly, 1.5amps for qty five 300mah batts at 1c; equivalent to a single 1s 1500mah battery.
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Old 02-27-2013, 01:06 PM   #9 (permalink)
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Originally Posted by helisteve60 View Post
Yes I understand the charge rate but do I allso add the total mah? So 5 300mah at one c my amps would be 1.5, but would I set the mah to 1500 or just 300. In other words is it like charging a single 1500mah 1s lipo?
there are two types of charge. One is serial and the other is parallel.

With serial, you add the voltage when charge so if you are charging 3 1S (3.7v) 300mah batteries, you will be charging as if you have a 3 cell (3s) 300mah so you would set your charger to charge at 11.1v 300mah (or .3amp).

in contrast, if you are charging by parallel, you add the capacity together so if you are charging 3 1S 300mah batteries, you will set your charger to charge at 3.7v 900mah (or .9amp or at least close to it) for 1C charge.

Depending on the type of batteries, you can charge more than 1C but from what I read, charging at 1C will possibly prolong the battery life.
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Old 02-27-2013, 06:42 PM   #10 (permalink)
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I run a hyperion duo3 charger and I can set both the charge mah and the capacity mah of the battery to be charged. So I know if im charging 5 300mah lipos I set my charge amps to 1.5 amps but do I set the capacity of the lipos to 300 or add them all to get 1500mah? I think maybe the differences I have a few more settings then the I charger
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Old 02-27-2013, 10:02 PM   #11 (permalink)
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Default Charging multiple batteries at the same time ?

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Originally Posted by helisteve60 View Post
I run a hyperion duo3 charger and I can set both the charge mah and the capacity mah of the battery to be charged. So I know if im charging 5 300mah lipos I set my charge amps to 1.5 amps but do I set the capacity of the lipos to 300 or add them all to get 1500mah? I think maybe the differences I have a few more settings then the I charger
Again, if you read my post carefully, for parallel charge you add the capacity but keep the voltage the same. Thus for you, you need to set your Hyperion to charge at 1S (3.7v) at 1500 mah
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Old 02-27-2013, 11:13 PM   #12 (permalink)
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I charged my 3x200 mah stock with 0.2 A & 3x300 mah nano with 0.3A but sometimes I went for 2C that is 3x200 mah with 0.4 A and 3x300 mah with 0.6A. Im using these :



....now Im looking into this one....
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Old 02-28-2013, 05:28 AM   #13 (permalink)
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Default Re: Charging multiple batteries at the same time ?

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Originally Posted by cpmboy View Post
I charged my 3x200 mah stock with 0.2 A & 3x300 mah nano with 0.3A but sometimes I went for 2C that is 3x200 mah with 0.4 A and 3x300 mah with 0.6A. Im using these ]
I cant see that first cable well enough to tell, but Serial, or Parallel charging? If parallel, your numbers are off....3x200mah at 1c would be .6amps on your charger....not .2amps.

2c would be 1.2 amps for the same set of batteries (in parallel).
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Old 02-28-2013, 07:45 AM   #14 (permalink)
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Originally Posted by cpmboy View Post
I charged my 3x200 mah stock with 0.2 A & 3x300 mah nano with 0.3A but sometimes I went for 2C that is 3x200 mah with 0.4 A and 3x300 mah with 0.6A. Im using these :



....now Im looking into this one....
The small 3 lead cable is for Series charging. It sees the 3 batteries as a single 3s battery and charges it as such. It also hooks up to the balancing post.I hate mine as it takes so long even at a 3c charge rate. It sits in my box.

The Hyperion parallel board is nice and what I use. http://media.hyperion.hk/dn/g3lipo/lgum6p.htm

* The adapter can charge 1 cell to 6 cells at the same time. However, note that this connection is PARALLEL. As such, all batteries should be at approximately the same state of discharge when connected to the adapter.

* Due to the parallel arrangement, any small differences in cell voltage will be balanced after the batteries are connected together for a few minutes. A balancer connection is not required, therefore, as each cell will automatically balance to the other after connection and during charge.

I charge my Hyperion G3 250's at 5c charging rate. They have done excellent. Hyperion G3 LiPo can be charged at up to 6C rates, but Hyperion recommends 5C maximum. The time saved at 6C is inconsequential to to CC/CV charge curves, and 5C guarantees ZERO reduction in lifecycle performance with Hyperion G3 technology. Many other brands allow only 1C max charge rate, so be careful about this point.

I have 2 stock chargers so if my batteries vary too much I use the board for 1 and with the stock charges at .7 I can charge 3 batteries in about 15-20 minutes so in an hour I can have about 8 batteries ready in the time it takes the Series cable to charge 3.
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Old 02-28-2013, 08:15 PM   #15 (permalink)
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I cant see that first cable well enough to tell, but Serial, or Parallel charging? If parallel, your numbers are off....3x200mah at 1c would be .6amps on your charger....not .2amps.

2c would be 1.2 amps for the same set of batteries (in parallel).
series...
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