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Search: Posts Made By: ggcrandall1
Showing results 1 to 25 of 35
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Forum: Batteries & Chargers
02-22-2016, 12:53 PM
Replies: 14
Views: 17,471
Posted By ggcrandall1

When parallel charging it is very easy to connect...

When parallel charging it is very easy to connect the multiple packs using a parallel adapter board. About the only thing to be concerned about is not connecting packs with a large difference in...
Forum: Batteries & Chargers
11-21-2015, 05:15 PM
Replies: 6
Views: 1,269
Posted By ggcrandall1

Best guess is you are killing your batteries in...

Best guess is you are killing your batteries in one or both of two ways.
1. Never discharge a LiPo cell below 3.4V under load (3.7V at rest).
2. Never leave a LiPo fully charged for any significant...
Forum: Batteries & Chargers
11-21-2015, 05:05 PM
Replies: 4
Views: 1,047
Posted By ggcrandall1

The increase in mAh will increase the flight...

The increase in mAh will increase the flight duration. The increase of the C rate will have no effect.

May I suggest you read this:
http://www.tjinguytech.com/charging-how-tos

There is a good...
Forum: Batteries & Chargers
11-21-2015, 04:46 PM
Replies: 8
Views: 728
Posted By ggcrandall1

Only if you want to burn up a battery and maybe...

Only if you want to burn up a battery and maybe the plane it's installed in.

You cannot connect batteries of different voltages in parallel.

Glen
Forum: RC Humor
11-18-2015, 12:15 AM
Replies: 4
Views: 4,656
Posted By ggcrandall1

How do you know if you haven't divorced her yet?...

How do you know if you haven't divorced her yet? ;)

Glen
Forum: Batteries & Chargers
11-18-2015, 12:05 AM
Replies: 2
Views: 614
Posted By ggcrandall1

What is the voltage of the NiMH pack you want to...

What is the voltage of the NiMH pack you want to charge?

Best charge rate for a 3000mAh pack would be 300mA. 400mA should be OK too.

Glen
Forum: Batteries & Chargers
02-09-2010, 08:40 PM
Replies: 8
Views: 1,561
Posted By ggcrandall1

RE: A123/Lipo Balancer???

Hey, you asked for a balancer that would do both LiPo and A123. I did the search that you could have done yourself. Then you beat me up about the price and found one cheaper. So why didn't you...
Forum: Batteries & Chargers
02-09-2010, 07:32 PM
Replies: 7
Views: 1,027
Posted By ggcrandall1

RE: Dead RX pack...Kicking myself

If the switch is between the ESC and RX then the ESC can still draw the battery down. You must unplug the battery from the ESC to prevent the battery from being discharged.

To dispose of a LiPo...
Forum: Batteries & Chargers
02-09-2010, 12:42 AM
Replies: 2
Views: 480
Posted By ggcrandall1

RE: What could it be?

Assuming your ESC has a LVC circuit the ESC thinks the lower voltage pack is still a 3 cell and is discharged. You will have to reprogram the ESC for a 2 cell pack.

Glen
Forum: Batteries & Chargers
02-09-2010, 12:33 AM
Replies: 8
Views: 1,561
Posted By ggcrandall1

RE: A123/Lipo Balancer???

Looks like this is one:

http://www.hobby-lobby.com/3_in_1_battery_balancer_lcd_4044_prd1.htm

Glen
Forum: Batteries & Chargers
02-06-2010, 08:01 PM
Replies: 4
Views: 682
Posted By ggcrandall1

RE: 2/3A discharge rate?

And BTW the physical size of the cells is not significant to this question. It would be the same for AAA, AA, C, or D.

Glen
Forum: Batteries & Chargers
02-06-2010, 07:57 PM
Replies: 4
Views: 3,251
Posted By ggcrandall1

RE: Lipo won't charge fully

Yes, It is probably worn out.

Glen
Forum: Batteries & Chargers
02-05-2010, 08:03 PM
Replies: 12
Views: 1,022
Posted By ggcrandall1

RE: Anyway to save a cell that's reversed pol.?

I beleive that it can happen sometimes if a NiCad or NiMh is discharged too low.

Glen
Forum: Batteries & Chargers
02-05-2010, 08:06 AM
Replies: 12
Views: 1,022
Posted By ggcrandall1

RE: Anyway to save a cell that's reversed pol.?

Mixstich.

Lets clarify some things. I assume you have a NiCad or NiMh 5 cell 1100mah battery. Two of the cells are bad.

You could replace the two bad cells. There will be no problem if...
Forum: Batteries & Chargers
02-05-2010, 07:51 AM
Replies: 8
Views: 1,703
Posted By ggcrandall1

RE: Lipo Battery Parallel noob question

The C rate of a battery does not change regardless of series/parallel connection. The C rate will always be the lowest of the batteries being ued.

While you can use batteries of different...
Forum: Batteries & Chargers
02-04-2010, 11:07 PM
Replies: 12
Views: 24,077
Posted By ggcrandall1

RE: what is cycle a lipo battery, and why is it important?

[/quote]

OK

But if I have 3 new LiPo batteries, never charged for my $ 10k+ jet just about to maiden, should I charge and discharge them just for testing their condition or should I rely...
Forum: Batteries & Chargers
02-04-2010, 03:00 PM
Replies: 2
Views: 519
Posted By ggcrandall1

RE: Battery help

Rodney gave you a good pace to check for information.. Here is another one:

http://sites.google.com/site/tjinguytech/charging-how-tos

Glen
Forum: Batteries & Chargers
02-04-2010, 02:56 PM
Replies: 3
Views: 722
Posted By ggcrandall1

RE: Checking a new A123 pack

Yes, but you can charge an A123 cell pack at higher than 1C. If your charger can handle it you can easily go as high as 5C.

Glen
Forum: Batteries & Chargers
02-04-2010, 02:39 PM
Replies: 5
Views: 1,005
Posted By ggcrandall1

RE: asize of cells

Check out cheapbatterypacks.com. They have loose NiCad cells and will custom make a battery for you.

http://www.cheapbatterypacks.com/?menu=EB09CEDAE4&sid=127027

Glen
Forum: Batteries & Chargers
02-04-2010, 02:28 PM
Replies: 14
Views: 17,471
Posted By ggcrandall1

RE: Lipo wiring parallel vs. series

I beg your pardon but increasing the mah size of a battery will not overheat the motor. Increasing the mah of the battery will not increase the amount of current the motor pulls. It will only allow...
Forum: Batteries & Chargers
02-04-2010, 12:49 PM
Replies: 0
Views: 653
Posted By ggcrandall1

New Charger From FMA

FMA has announced a new charger. The FMA CellPro PowerLab 8 is an 8 cell 1000watt charger.

Check here for details:

http://www.fmadirect.com/new_applications/powerlab8.html

The...
Forum: Batteries & Chargers
02-04-2010, 12:38 PM
Replies: 12
Views: 24,077
Posted By ggcrandall1

RE: what is cycle a lipo battery, and why is it important?

Usually chargers incorporate cycling, to condition NiMh or NiCad batteries. This usually consists of a charge fallowed by a discharge, or a discharge followed by a discharge. This feature was...
Forum: Batteries & Chargers
02-01-2010, 03:25 PM
Replies: 21
Views: 3,489
Posted By ggcrandall1

RE: How big deep cycle battery to charge 5amp lipos at the field?

How about a permanent mount on the back bumper of the van. That would keep you from having to lift the battery and also keep the charging gsses from the interior.

Glen
Forum: R/C Sky Diving
04-16-2007, 04:36 AM
Replies: 11
Views: 2,862
Posted By ggcrandall1

RE: Sneak peak of the NEW paraplane!

I just got home from the Weak Signals Show in Toledo. I met Dave there and got to see his new Paraplane. Very impressive. Good luck with it Dave.

Glen
Forum: R/C Sky Diving
03-29-2007, 02:54 PM
Replies: 106
Views: 15,664
Posted By ggcrandall1

RE: RC SKDIVING FORUM

Juanf,

Another skydiver here. I made my first jump in '73. 5 second ff under a paracommander. Last jump was about 5 years ago. I have a bit of age and weight on me and I became concerned...
Showing results 1 to 25 of 35
 
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