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lipo charge question

lipo charge question

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Old 05-16-2009, 09:00 PM
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i just picked up a reedy 7.4 2 cell lipo. im all ready to charge and set my esc to the proper cutoff. any ways i take it from the manual the cutoff is 6.2

what voltage should i charge it at ?
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Old 05-16-2009, 09:05 PM
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Your charger should have a mode for LiPo's. Set it for a 2-cell LiPo at 1C. (1C = mah of battery/1000)
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Old 05-16-2009, 09:27 PM
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The SAFE mandetory voltage is 6.0v
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Old 05-16-2009, 09:36 PM
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soo.... basicly 5.0-6.0 charge rate is ok. its a 5000mah battery
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Old 05-16-2009, 10:18 PM
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You want to charge at 5 AMPS. Not VOLTS.
Just to clear things up.
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Old 05-16-2009, 10:18 PM
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Originally Posted by crawldad91 View Post
soo.... basicly 5.0-6.0 charge rate is ok. its a 5000mah battery
1C charge rate is the safesest charge rating for all batteries unless they specify otherwise. In this case, charge no more then 5 amps or your gonna ruin that battery.
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Old 05-16-2009, 10:29 PM
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Take advantage of Reedy's tech support. That's what they're there for. For instance, I talked to MaxAmps' support and they say that their high capacity lipos can be charged at 2C rating any day.

But like the good folks here say, 1C rate is the safest and ensures a long life for your lipos. So I suggest you get more lipos so that you'll never have the need to charge quickly.
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Old 05-17-2009, 08:44 AM
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With your charger set to lipo, you will only be asked for the lipo capacity (mah) and number of cells (2s = 2 cells). You should not be able to vary anything else if the charger is using a proper lipo charge protocol. It will set the voltage and set the charge rate based on the # of cells and capacity.

If you have one of the newer chargers, it may give you the option to select what "C" rate you want to charge at (1C, 2C, 3C, etc). If not, it will charge at 1C.

make sure you are using the proper lipo mode - charging a lipo in any other mode is not safe and can ruin the lipo.
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Old 05-17-2009, 12:11 PM
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If I am in a hurry I'll charge my 5000mah @ 5 amps but if there is no hurry then I charge @ 1amp for a nice slow deep charge.
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Old 05-17-2009, 03:28 PM
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What could cause a Lipo to blow?
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Old 05-17-2009, 03:33 PM
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Originally Posted by arcarle View Post
If I am in a hurry I'll charge my 5000mah @ 5 amps but if there is no hurry then I charge @ 1amp for a nice slow deep charge.
You gain nothing by chargeing that slow.
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Old 05-17-2009, 03:43 PM
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Originally Posted by last View Post
What could cause a Lipo to blow?
Damaged cells, and charging at too high of voltage and current...

As long as you charge at the right voltage, and 1C you'll be fine.

Discharging too low, and too fast can also cause it too puff-up...

Generally, it won't explode, except during charging... As long as you take proper care of 'em, no problems, and if it's puffed up, don't charge it
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Old 05-17-2009, 03:50 PM
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Originally Posted by drperry View Post
Damaged cells, and charging at too high of voltage and current...

As long as you charge at the right voltage, and 1C you'll be fine.

Discharging too low, and too fast can also cause it too puff-up...

Generally, it won't explode, except during charging... As long as you take proper care of 'em, no problems, and if it's puffed up, don't charge it
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Old 05-18-2009, 07:10 AM
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Hey last, Put your electronic questions in the "radios/electronics" section on here and you'll get more help with them. The off-road forum is way to busy for your questions to get enough views.
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