Turnigy LiFEPO4 packs

[lutach]

Originally Posted by himalaya

I failed to find ANY CLUE to verify that they really do the "IR and capacity matching" job when building a pack as they claimed. I mean the big names, their triple or quad price tag that customers have to pay is only for the name, the service and much of their pocket, IMO.

Here's what I found between a cheap Turnigy 5000mAh and a big name hot product 4200mAh. These are the last 1/4 ending section of the discharge curve taken from a same charger and the packs are both brand new. Can anyone say it has tighter capacity tolenrance than the much cheaper one?

Turnigy:


a hot big name pack:


Also, at 3.2A discharge(due to 80W discharge limit of my charger) my Turnigy 5000mAh delivers 5184mAh while the big name 4200mAh delivers 4043mAh. And there come many complaint the Turnigy packs are heavier than SIMILAR RATED packs.

Awesome info. I think the companies in Asia are stepping up quality faster then most think. It's also up to the customer to choose how well they want something made. I like how some Hobbycity packs have 8AWG wires and other similar rated packs from other places have 12 or 10AWG and claim a much higher C rating. Some say in our application 12 or 10AWG is enough, but if some one is going to push their packs to the limits, a thicker AWG is better.

[lutach]

Originally Posted by lincpimp

A rapper also said " I've got that fire, holla at a nizzle if you want that oscar mayer"

Good advice to live by if you ask me!

I only bought 1 of the 2s2p 4500 packs, but I plan to test it in situations that would easily outclass a maxamps pack. Thats right, not 1 but 2 tamiya silver can motors and a 8lb truck that is geared for 5mph! And no lvc!!! Lets see any maxamps pack stand up to that abuse. My jugg2 will conquer all, after I overnight some parts from japan.

James,

In my high power car audio days, that song used to pop the hatch open in my hatchback, so a latch was needed .

I'll be looking out for more resulsts from you guys that got the cheaper life packs.

[suicideneil]

Rhetoric is my middle name*

*its actually matthew, but anyways- I stand by my previous statement

hmm, if they were a tad shorter I think they would be a perfect 4s setup for my ve8 with RX8 2650

[sikeston34m]

Originally Posted by lutach

James,

In my high power car audio days, that song used to pop the hatch open in my hatchback, so a latch was needed .

I'll be looking out for more resulsts from you guys that got the cheaper life packs.

I got the good packs. The "cheaper" ones come from Maxamps, don't they?

[lutach]

Originally Posted by sikeston34m

I got the good packs. The "cheaper" ones come from Maxamps, don't they?

I actually should've phrased it a bit better . I should've said cheaper priced and not just cheaper . You guys know what I meant though .

[lincpimp]

Originally Posted by lutach

James,

In my high power car audio days, that song used to pop the hatch open in my hatchback, so a latch was needed .

I'll be looking out for more resulsts from you guys that got the cheaper life packs.

Hope they work well. My application could use a stick pack, but for 25 bucks they have more capacity than any nimh you can get for that price. Plus nimhs blow.

Originally Posted by sikeston34m

I got the good packs. The "cheaper" ones come from Maxamps, don't they?

Oh so true!

Originally Posted by suicideneil

Rhetoric is my middle name*

*its actually matthew, but anyways- I stand by my previous statement

Neil Matthew, sounds kinda like a redneck name!!! But you lack the hyphen. Redneck Neil for da UK!!! Your new online dating handle!

[lincpimp]

Ok, anyone think I could use a timed charger like the old mega one to juice s 2s 4500 LiFe pack? I need to check the output voltage, not sure what it pushes. How does these LiFe cells like overvoltage? I know Gee knows how lipo likes overvoltage... HEHEHEHE.

[ticklechicken]

Are these HK Life packs waterproof?

[sikeston34m]

Originally Posted by lincpimp

Ok, anyone think I could use a timed charger like the old mega one to juice s 2s 4500 LiFe pack? I need to check the output voltage, not sure what it pushes. How does these LiFe cells like overvoltage? I know Gee knows how lipo likes overvoltage... HEHEHEHE.

At the end of the charge, you want to hold the voltage at 3.6 volts per cell. A good charger will do this and allow the amperage to taper off until the cell is full.

The closer the cell gets to 3.6 volts, the less amperage it will accept without going over 3.6.

Yeah, I checked it out. LOL If the amperage isn't throttled back when the cell hits 3.6 volts, then the cell voltage just runs away with itself.

I did see mine Quickly hit 4.0 volts per cell, when playing around with the charger. I Quickly terminated the charge of course.

I have read they tolerate overcharging pretty well, but it does substantially shorten the life of the cell.

Linc, I thought you had a MRC Superbrain 989? If you do, just hit the Lead Acid Mode and set it to "1 cell". This is the mode you need to charge your new pack when you get it. It will charge to 7.2 volts.

[sikeston34m]

Originally Posted by ticklechicken

Are these HK Life packs waterproof?

Water proofing is what? Some Silicone applied to the ends?

I know Maxamps advertises "Waterproof", but they can only be water resistant.

Even then, water can/will still "wick" up the wires and enter the pack anyway.

To answer your question, No, they don't claim to be water proof.

[lutach]

How many have tested water for electrical conductivity? If one has you know the answer. Like my man Bruce Lee once said, "Be like water". I got a few lipos wet and they're still going strong.

[J57ltr]

Where are the 5Ah Turnigy's? I didn't see them listed on that website.

Waters conductivity depends on the contaminants in it. Pure water doesn't conduct electricity. If it does get in a pack it's biggest problem is corrosion. Then again some people can claim anything about their packs. I am suprised that superconductivity hasen't been mentioned.

Jeff

[lincpimp]

Originally Posted by sikeston34m

Linc, I thought you had a MRC Superbrain 989? If you do, just hit the Lead Acid Mode and set it to "1 cell". This is the mode you need to charge your new pack when you get it. It will charge to 7.2 volts.

No, I have real chargers now! I have 4 hyperion chargers, but wanted a simple alernative for the house, as my chargers are setup at work with the bulk of the rc. I want to have a setup at home to dick around with in the evenings... Just to give me some relaxation.

[himalaya]

Originally Posted by lutach

How many have tested water for electrical conductivity? If one has you know the answer. Like my man Bruce Lee once said, "Be like water". I got a few lipos wet and they're still going strong.

I have experienced some issues with lipo+water. Green stain apears on the balance tab, it starts from one end and then as time goes on spreads to the other end, a very clear electro-chemical effect. Those stain will cause unstable cell voltage readings thus balance result. I have(have to )replaced two balance tabs of my 10 6S packs.

Most LiPos are shrink wrapped, once water gets into the pack it can hardly find its way out. When I opened one of my failed pack I was shocked how bad it smells and what power a tiny drop of water DOES have. At many dots the metal part of the aluminum-plastic film are gone, making the cells leak. You know the leaked electro-liquid is conductive and corrosive, making more metal film disapear, and finally make the whole pack fail. As a temperary solution I made round whole windows on my survived packs' wrap film to help water out(helps it in too, but drys much faster)