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How do I know when Battery is fully charged see pic

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How do I know when Battery is fully charged see pic

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Old 01-13-2018, 06:34 AM
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Originally Posted by NitroB810 View Post
Thanks guys for your help.

It beeps when full and also max charge per cell is to be 4.2 as you have mentioned so max 8.4 for 2s battery - 16.8v max for a 14.8v 4s battery etc.

Should the storage charge per cell be about 3.8v?
Yes, 3.75 - 3.85v per cell is good for storage. The charger should have a STO or storage charge mode which will automatically either discharge or charge as applicable until the pack reaches whatever storage charge voltage is set in the menu (or the default value which will be detailed in the manual).
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Old 01-14-2018, 11:02 PM
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Originally Posted by olds45512 View Post
Since your battery is 3200mah you should be balance charging it at 3.2amp. whenever you balance charge you want to do it at 1x the capacity so it you have a 4400mah pack you would charge at 4.4amp and if it's 5000mah you would charge at 5.0amp.

Does this still hold true for new chargers and batteries?

I have an orion 4400 110c (carbon fiber look) graphite case or whatever, Reedy Zapper 4800 100c (7.6v max) and some SMC 4400 100c. Always balance charger / storage charge after use. Typically charge at 6-7 amps. Storage charge at 1 amp. Using a venom pro dual charger (brand new)
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Old 01-15-2018, 03:34 AM
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Originally Posted by olds45512 View Post
Since your battery is 3200mah you should be balance charging it at 3.2amp. whenever you balance charge you want to do it at 1x the capacity so it you have a 4400mah pack you would charge at 4.4amp and if it's 5000mah you would charge at 5.0amp.
I got the same info at the local track

Why is that ??
What’s the point of all this high amp chargers then ha
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Old 01-15-2018, 09:12 AM
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a lot of the new batteries can be charged at a higher "C" rate.
So people charge at the higher rates to speed up the charge time and the performance is usually better.
Most of the new batteries can safely be charged between 2C-5C and some even higher.
To be safe charging at 1C or 2C is better until you get more experience.

One mistake and at a minimum you lose a battery, maybe a charger and power supply, above that it could be a RC Shop or your house that burns down.
If you haven't seen a Lipo fire it is like a road side flare, once lit its almost impossible to put out because its a chemical fire and if it started it wont stop until all of the fuel is burned up.
Be Safe
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Old 01-15-2018, 10:23 AM
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Originally Posted by Losi T-Racer View Post
a lot of the new batteries can be charged at a higher "C" rate.
So people charge at the higher rates to speed up the charge time and the performance is usually better.
Most of the new batteries can safely be charged between 2C-5C and some even higher.
To be safe charging at 1C or 2C is better until you get more experience.

One mistake and at a minimum you lose a battery, maybe a charger and power supply, above that it could be a RC Shop or your house that burns down.
If you haven't seen a Lipo fire it is like a road side flare, once lit its almost impossible to put out because its a chemical fire and if it started it wont stop until all of the fuel is burned up.
Be Safe
Thanks

Also found this after googling c rating ha

Battery C Rating - The C rating of a battery (or cell) is used to indicate the continuous current draw (amps) the cell will support. By multiplying the C rating times the cell capacity in milliamperehours (mAh), the continuous current in milliamperes (mA) of a cell is easily calculated. Example - For a 2000 mAh battery with a 15C rating, the continuous current that may be drawn out of the battery is 2000 mAh x 15 = 30000 mA, or 30 Amps (A) (divide by 1000). There is also another rating that is applicable to a battery known as peak or "burst" current discharge rating. Peak current is higher than continuous C rating. It indicates that a battery will deliver higher current than the C rating for brief instances. For ease of calculations, LiPo Calc does not take peak current into account. This figure varies widely with battery type and in most applications is not required for calculating a suitable battery pack configuration. Instead, LiPo Calc calculates battery pack configurations such that current draw will never exceed the continous C rating of the battery. Of course, the calculation is only as good as the inputs supplied, so make certain to enter an accurate number in the Amps field. If you aren't sure how many amps your specific motor/prop/gear train configuration pulls, use an amp meter to measure the current draw between the motor and the ESC in static condition using a known good power source of approximately the same voltage as the LiPo configuration you intend to use. Put that number into the Amps field.
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Old 01-15-2018, 12:18 PM
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Read the instructions. There is a lot of valuable info in there re: Lipo battery care.
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Old 01-15-2018, 04:22 PM
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IF you select Balance on the charger - If its like mine (I use a Venom charger)
When I select my Right arrow (3rd button) it shows what each Cell is registering voltage wise.

*EACH CHARGER IS DIFFERENT, SO CONSULT YOUR MANUAL*

(Public safety warning)



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Old 01-22-2018, 08:07 AM
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Out of interest what exactly is the cause of a battery going on fire?
Is it charging at too high amps? faulty charger? what else?
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Old 01-22-2018, 09:47 AM
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Originally Posted by NitroB810 View Post
Out of interest what exactly is the cause of a battery going on fire?
Is it charging at too high amps? faulty charger? what else?
When the cell gets damaged in any way it will become dangerous.
- physical damage
- over voltage -> like charging with a wrong setting
- under voltage -> mostly the cell wil expand to a boll shape

In any way this can cause fire and sometimes not directly but after many hours as wel or the next charging.

Thats why to keep these batteries in a LiPo bag or some people use a munition storage box
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Old 01-22-2018, 11:53 AM
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Originally Posted by Roelof View Post
When the cell gets damaged in any way it will become dangerous.
- physical damage
- over voltage -> like charging with a wrong setting
- under voltage -> mostly the cell wil expand to a boll shape

In any way this can cause fire and sometimes not directly but after many hours as wel or the next charging.

Thats why to keep these batteries in a LiPo bag or some people use a munition storage box
Ah yes okay, thanks Roelof
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Old 01-23-2018, 06:36 AM
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Originally Posted by NitroB810 View Post
Thanks guys for your help.

It beeps when full and also max charge per cell is to be 4.2 as you have mentioned so max 8.4 for 2s battery - 16.8v max for a 14.8v 4s battery etc.

Should the storage charge per cell be about 3.8v?
3.7-3.8 per cell for storage
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Old 01-26-2018, 10:00 AM
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Originally Posted by JPAPA26 View Post
3.7-3.8 per cell for storage
How long can you store a battery for a good quality lipo?
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Old 01-26-2018, 10:03 AM
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1-1.5 years?
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Old 01-26-2018, 10:09 AM
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sorry i should reword that!

How long can you store a good quality lipo battery? 1-1.5 years more?
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Old 01-29-2018, 09:50 AM
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HEY,

Is it okay to run a starter box off a 4s lipo?
this battery to be exact> https://www.aliexpress.com/item/Gian...288511725.html

the suggest battery pack for the starer box is a 12v or two 7.2v

Let me know thanks guys
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