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Type: Posts; User: rupert

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1. ## Thread: Anyway to revive some capacity to a lipo?

by rupert
Replies
4
Views
374

### Never , ever have I found a way to add (real)...

Never , ever have I found a way to add (real) capacity to ANY lipo cell damaged or otherwise. Gaining the capacity at both ends compared to the sibling cells in a pack isn't really real , but works....
2. ## Thread: My 6400 mah 3s . Only 3500 mah charge. Is it 2parallel.

by rupert
Replies
21
Views
1,331

### Then the most important volt readings are going...

Then the most important volt readings are going to be the individual cells at least 5 minutes after your run.
3. ## Thread: My 6400 mah 3s . Only 3500 mah charge. Is it 2parallel.

by rupert
Replies
21
Views
1,331

### I'm saying that it is possible to estimate...

I'm saying that it is possible to estimate capacity remaining or required capacity to full mark or empty mark by using the open voltage of the pack or cells.

I guess another way to put it would be...
4. ## Thread: My 6400 mah 3s . Only 3500 mah charge. Is it 2parallel.

by rupert
Replies
21
Views
1,331

### resting volt readings are the key.

resting volt readings are the key.
5. ## Thread: My 6400 mah 3s . Only 3500 mah charge. Is it 2parallel.

by rupert
Replies
21
Views
1,331

### sorry, double post.

sorry, double post.<_<
6. ## Thread: My 6400 mah 3s . Only 3500 mah charge. Is it 2parallel.

by rupert
Replies
21
Views
1,331

### Capacity estimate is possible with before and...

Capacity estimate is possible with before and after charge resting voltages only. Or just use the two methods already in place (label and charger display)

Here's what I think you are asking. If...
7. ## Thread: Lipo charge help

by rupert
Replies
11
Views
1,057

### It's very likely that your charger's current is...

It's very likely that your charger's current is inaccurate. The first thing I'd do is to verify current at max setting.
8. ## Thread: Lipo voltage, is this ok?

by rupert
Replies
9
Views
967

### The answer to an unbalanced pack is almost ALWAYS...

The answer to an unbalanced pack is almost ALWAYS the same. Balance the pack. Pack is now balanced.
9. ## Thread: Biggest power gain?

by rupert
Replies
16
Views
1,323

### The biggest power gain is almost always...

The biggest power gain is almost always increasing voltage. If your set-up can handle more voltage then go to the max.
10. ## Thread: Mod 1 OR Mod .8

by rupert
Replies
2
Views
1,085

### Thanks, I'll stick w/ the 32. My set-up isn't...

Thanks, I'll stick w/ the 32. My set-up isn't real powerful anyways.
11. ## Thread: Mod 1 OR Mod .8

by rupert
Replies
2
Views
1,085

### Mod 1 OR Mod .8

I've been using Mod 1 on my e-maxx for a few years without trouble. I have a new set-up now where 32 pitch (mod.8) is a much easier way.

Does 32 pitch hold up well for Monster BL systems? OR am I...

by rupert
Replies
3
Views
398

### If I understand the question you are asking for a...

If I understand the question you are asking for a no load voltage spec for discharged NI type cell?

If so it can be user's preference , anything from 0-1.2 volts is essentially discharged. As long...

by rupert
Replies
4
Views
2,130

### 99% of the time my chargers get left on "max"...

99% of the time my chargers get left on "max" current because I'm in a hurry.
14. ## Thread: Battery help plz

by rupert
Replies
17
Views
685

### It may be easiest to think of this in total...

It may be easiest to think of this in total voltage. There's a direct correlation between voltage and (power/speed)

It seems most use around 16-18 volts. 12 volts is going to be slower than...
15. ## Thread: Battery help plz

by rupert
Replies
17
Views
685

### You can run it on one 3s pack. It will probably...

You can run it on one 3s pack. It will probably be fine in low gear , but may be too much in high gear. A nice combo would be your 2200 packs on the bec side and the 2000 packs on the other side.
16. ## Thread: Battery help plz

by rupert
Replies
17
Views
685

### Try them in parallel set-ups first to check them...

Try them in parallel set-ups first to check them out.

by rupert
Replies
8
Views
926

### To charge cells in series they must require the...

To charge cells in series they must require the same amount of capacity. Hopefully you already know if when using them they do require the same amount when recharged separately (you've compared them...

by rupert
Replies
8
Views
926

### Yes , if they are LI type No , if they are NI...

Yes , if they are LI type

No , if they are NI type
19. ## Thread: lipo decision, cant decide?

by rupert
Replies
43
Views
3,605

### Each specific graph must be searched to see if it...

Each specific graph must be searched to see if it exists yet OR graph can be generated if one has the pack in hand. Any 2 cba graphs can be overlaid by anyone with cba software. If you'd like I can...
20. ## Thread: lipo decision, cant decide?

by rupert
Replies
43
Views
3,605

### Although I don't use this 90% capacity rating...

Although I don't use this 90% capacity rating criteria , if asked how to describe the difference between the two packs I can't find any better way to describe the 4 graphs than the way you have done...
21. ## Thread: lipo decision, cant decide?

by rupert
Replies
43
Views
3,605

### It depends what you mean by "similar". Those...

It depends what you mean by "similar". Those voltages above are my best guess if the packs are truly as labeled. If 7.2, 7.4, and 7.6 are "similar" then sure. If I showed you all three (unlabeled)...
22. ## Thread: lipo decision, cant decide?

by rupert
Replies
43
Views
3,605

### Amp draw of course goes UP , and so does the...

Amp draw of course goes UP , and so does the ground speed. However, if the speed of the vehicle is such that it is not taxing the battery then as soon as top speed is reached the unloading says that...
23. ## Thread: lipo decision, cant decide?

by rupert
Replies
43
Views
3,605

### We are in a sense saying the same thing. Let's...

We are in a sense saying the same thing. Let's assume the ratings are correct and a max of 20C during the race. Comparing the 20C pack to a 60C pack would show the 60 C pack accellerating harder and...
24. ## Thread: lipo decision, cant decide?

by rupert
Replies
43
Views
3,605

### From my limited experience the difference is...

From my limited experience the difference is close to linear UNTIL the max is reached then it "falls like a rock"
It should look like this:

At 1 c discharge the difference is barely detectable....
25. ## Thread: lipo decision, cant decide?

by rupert
Replies
43
Views
3,605

### Jakey or myself can easily overlay a 40C pack...

Jakey or myself can easily overlay a 40C pack with a 20C pack of the same capacity showing a stark contrast between the voltages at 5-50C. Can we post pics here? It isn't traxxas stuff.
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