Originally Posted by Truckracer

That must be one wimpy LiFe pack for voltage to drop that much under load. What is it's "C" rating? A 1 amp load isn't much of a load.

20C 2,100 mAh used for TX pack.

Across the board every 2S LiFe pack I have tested over the years does not hold voltage as well as a Lipo or Lion. The exception are A123 cells.

Originally Posted by Truckracer

J

LiFe: Turnigy Transmitter pack, 2100 Mah - 20C rating, 2 cell
Open terminal voltage: 6.66V
1Amp. load voltage: 6.56V
Voltage drop .1V

Here's is what I just measured. Dropped below 6 volts just after snapping that second photo. Dropped more earlier.

Originally Posted by Judge

20C 2,100 mAh used for TX pack.

Across the board every 2S LiFe pack I have tested over the years does not hold voltage as well as a Lipo or Lion. The exception are A123 cells.

Thats why I did tests on both the LiFe (poly package) and a A123.

I just tried again using the old Duralite load tester I have.

No load = 6.61v
500 mA =6.49v
1 amp = 6.36v
1.5 amp = 6.21v

Might be the 8-Ball checker is giving overly pessimistic readings.

Originally Posted by Judge

Here's is what I just measured. Dropped below 6 volts just after snapping that second photo. Dropped more earlier.

Don't know what to say. I measured the voltage direct from the cells through the balance tap so there are no IR connector losses like might be experienced with a battery tester. I still suspect connector losses on your tester as no healthy battery of these types should experience that much voltage drop on just a 1A load. Yes, standard LiFe and LiOn batteries usually experience more voltage drop than LiPo and A123.

As mentioned, I was originally looking for a neat clean secure battery mount which prompted the Li-Ion questions.

So I'm still intrigued by the Jeti Li-Ion offerings, but would welcome any battery mount suggestions for Life. I don't think I have any interest in LiPo, I have already experienced one of those going up in flames!!

Same pack:

Balance tap with Hyperion EOS Sentry tester on balance taps = 6.64v
Duralite no load with servo plug = 6.63v
8-Ball = 6.64v

Seems fairly consistent

2S 1,350 mAh 20C Lipo
Balance taps = 7.60v
Duralite = 7.59v
8-ball = 7.60v

So not any difference on my 3 checkers between balance taps or the main servo type plug

Bottom line for me I prefer Lipo or Lion for RX packs. Even in real world use I have seen LiFe pack drop more than I like when looking at in flight telemetry.

As always YMMV!!

Originally Posted by Judge

Same pack:

Balance tap with Hyperion EOS Sentry tester on balance taps = 6.64v
Duralite no load with servo plug = 6.63v
8-Ball = 6.64v

Seems fairly consistent

2S 1,350 mAh 20C Lipo
Balance taps = 7.60v
Duralite = 7.59v
8-ball = 7.60v

So not any difference on my 3 checkers between balance taps or the main servo type plug

Bottom line for me I prefer Lipo or Lion for RX packs. Even in real world use I have seen LiFe pack drop more than I like when looking at in flight telemetry.

As always YMMV!!

No argument from me on your last statement. I have seen some fairly large performance differences between the poly LiFe batteries and A123. Later LiOn batteries have come a very long ways from what we had just a few years ago. I would have no problems using LiOn these days but I'm still no fan of LiPo batteries in larger planes as I like to leave my batteries in place during storage.

Originally Posted by Truckracer

No argument from me on your last statement. I have seen some fairly large performance differences between the poly LiFe batteries and A123. Later LiOn batteries have come a very long ways from what we had just a few years ago. I would have no problems using LiOn these days but I'm still no fan of LiPo batteries in larger planes as I like to leave my batteries in place during storage.

Being able to leave the batteries in place while charging is also very convenient and what I am accustomed to. Another plus for the Li-Ion battery alternative.

I'm still torn between the two and it looks more and more like a preference over performance. In this instance, the mount is a BIG consideration as that is what got this ball rolling to begin with.

Anyone want to weigh in specifically on the Jeti Li-Ion as originally posted?

Originally Posted by GR8R8

Being able to leave the batteries in place while charging is also very convenient and what I am accustomed to. Another plus for the Li-Ion battery alternative.

I'm still torn between the two and it looks more and more like a preference over performance. In this instance, the mount is a BIG consideration as that is what got this ball rolling to begin with.

Anyone want to weigh in specifically on the Jeti Li-Ion as originally posted?

Regardless of your final battery choice, one needs to have confidence in the chosen technology and vendor. I use A123 batteries mostly because of my comfort level using them and the majority of my planes being non HV compatible. But anything bought over the last several years is HV compatible and I would have no problem using the current generation of LiOn batteries in these planes with similar comfort and confidence based on how reliable they have been in multiple power tools.

Originally Posted by GR8R8

Anyone want to weigh in specifically on the Jeti Li-Ion as originally posted?

No experience with them. But lions in general are great cells. I've been using the Fromeco brand for years. Never been unhappy.

just to add my two cents, and I have used both. I like being able to plot the discharge curve and figure out my cushion, which you can do with lions, cannot with LiFes. Since everything I run these days is HV, I also like the higher voltage. it's quite easy to build a mount for either one if that's a motivation.

How far down can you run lions before they need recharge?Can you get more flight time with them,compared to a123's.

Fromeco recommends 7 volts under a 1 amp load as the no fly voltage.

Well it seems that Li-On's seem to have a wider voltage usage range. 8.4 - 7 volts is sure more than 6.8-6.4 on a123's.But