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Old 05-22-2008, 03:06 AM
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jacob711
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Default charging lipos

hi i am going to be running 2x2s lipos in series and charging them in series and i have a few questions,

1. should i charge them up fully on the first charge

2. im not sure if for the first charge i should charge them separately

3. should i go easy on the trigger for the first few runs to break them in or whatever

4. when storing them do i need to charge them



Old 05-22-2008, 07:34 AM
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WakeBoardnBash
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Default RE: charging lipos

Use the SEARCH FEATURE Please
Old 05-22-2008, 07:46 AM
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Default RE: charging lipos

Charge them individually first to ensure they are at the same voltage. Always run them together. If you are not comfortable with charging them in series you can charge them in parallel at double the current.

You don't need to go easy on the packs.

Store them at 3.4v per cell. This is less than 50% capacity.

Ryan
Old 05-22-2008, 08:02 AM
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number40
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Default RE: charging lipos

always charge them seperately.
charge them fully the first time.
always charge them seperately.
you can run them as hard or as easy as you want the first time or afterwards, lipos have no memory.
always charge them seperately.
they should never be allowed to drop below their recommended minimum voltage whether while running them or during storage. i always follow the factory recommended procedures for packs whether charging or for voltage cutoff and storage voltage which I've never seen below 3.4v per cell. personally I don't store at less than 50% or 3.7v per cell.
Old 05-22-2008, 08:35 AM
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jacob711
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Default RE: charging lipos

why do you say charge them separately because most of the guys out there charge them together
Old 05-22-2008, 10:27 AM
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secretsg
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Default RE: charging lipos


ORIGINAL: ryan_t888

Charge them individually first to ensure they are at the same voltage. Always run them together. If you are not comfortable with charging them in series you can charge them in parallel at double the current.

You don't need to go easy on the packs.

Store them at 3.4v per cell. This is less than 50% capacity.

Ryan
LIPO storage charge is 60% of capacity.
Old 05-22-2008, 11:22 AM
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ryan_t888
 
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Default RE: charging lipos


ORIGINAL: secretsg


ORIGINAL: ryan_t888

Charge them individually first to ensure they are at the same voltage. Always run them together. If you are not comfortable with charging them in series you can charge them in parallel at double the current.

You don't need to go easy on the packs.

Store them at 3.4v per cell. This is less than 50% capacity.

Ryan
LIPO storage charge is 60% of capacity.

It's stated very clearly right on Flight Power cells made by Enerland (best cells money can buy) 3.4v/cell storage. That is 40% capacity. Any more or less will result in reduced life span, test proven.

Ryan
Old 05-22-2008, 08:30 PM
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GregS
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Default RE: charging lipos

why do you say charge them separately because most of the guys out there charge them together
If you only have one balancer you cannot balance charge when charging the two connected in series. If you have unlimited time it is better to balance charge them separately. I balance charge them separately prior to a race day when I have time. Between heats on race day when there is limited time I'll charge them in series without the balancer. They do not seem to go much out of balance on only 2 charge/discharge cycles.

Greg
Old 05-23-2008, 10:16 PM
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Stinger9d9
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Default RE: charging lipos


ORIGINAL: GregS

If you only have one balancer you cannot balance charge when charging the two connected in series...
I'm pretty sure you can according this thread...

[link]http://www.rcuniverse.com/forum/m_7505384/tm.htm[/link]
Old 05-23-2008, 10:42 PM
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GregS
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Default RE: charging lipos

I'm pretty sure you can according this thread...
I didn't look at the link but I assume it's a diagram showing you how to rig your own adapter so you can balance charge both packs with one balancer. I've been aware of this for some time as well as the source that it originated from. However, it requires one to specially make this adapter. With the standard equipment you can only balance charge one pack with one balancer.

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