lipo4 lithium battery

On Thursday, January 1, 2015 6:31:10 AM UTC-8, joesimmers wrote:
I've flown a full season with the Starkpower

Very pleased with them, $99 is a deal for them.

Some details on the LiPO4 Batteries.

Graphs experience.

http://www.craggyaero.com/lifepo_battery.htm

I flew about 200 hrs last summer with LiPO4 batteries.

Richard
www.craggyaero.com

I've got one from Tenergy. Perfect fit (same size as a 9 Ah AGM
battery), about 1/3 the weight, higher voltage and power rating and a
lot more expensive. Would I do it again? You bet!


On 12/31/2014 9:38 PM, shkdriver wrote:
Has anyone adopted the K2 brand lithium as a ship battery?
Praise or Problems? the reduced weight appeals to me.
Scott.

--
Dan Marotta

My Tenergy battery and charger came with a tech sheet which showed the
charging regimen. According to the graph, the charge current drops to
zero when the battery is charged.

So far, I have removed the battery from my glider after flying and
brought it home to charge. On a couple of occasions I've forgotten to
unplug it over night and, on one occasion, for a couple of days. On each
occasion, I felt the battery and the charger and neither showed any sign
of heating. I leave my lead batteries on the Battery Tenders
continuously in the hangar. Maybe next season I'll do the same with the
lithium battery.


On 12/31/2014 9:38 PM, shkdriver wrote:
Has anyone adopted the K2 brand lithium as a ship battery?
Praise or Problems? the reduced weight appeals to me.
Scott.

--
Dan Marotta

On Wednesday, December 31, 2014 8:38:42 PM UTC-8, shkdriver wrote:
Has anyone adopted the K2 brand lithium as a ship battery?
Praise or Problems? the reduced weight appeals to me.
Scott.

I used the K2 LiFePO4 batteries (with BMS) all last year. I also used a battery tester to put them through their paces prior to flying with them. They last about 15-20% longer than my larger and heavier 10.5 Ah SLA batteries and have a much, much flatter voltage profile during discharge. This means they go even longer before you get battery warnings (that is mostly a good thing - though the time from first warning to flat is 15 minutes or less). The flatter, higher voltage profile also makes it a lot easier to slave two batteries together through a pair of Shottky power diodes because the diode voltage drop doesn't reduce useful battery life nearly as much as with SLA.

Nothing but good things to say about them. They are expensive, but worth it to me.

9B

On my third season with LiFePO4 batteries running a full-panel*. I would not go back to old fashioned SLAs.
Phosphate batteries recharge much faster than SLAs, and the charge has a long shelf life.
Jim
*Full VGA display, flight computer, radio, transponder, flarm.

Been using the lifepo4 batteries from Bioenno Power for about 18 months. Very flat discharge curve. Works great, no complaints.

Just bought the 9Ah battery and charger was $111.99 ($10 shipping) in the same size format as the "standard" #1290 SLA batteries we all seem to use (used?).

http://www.bioennopower.com/collecti...ifepo4-battery

I ran a K2 LiFePO4 battery I got from FoxOne all last season. My glider really only has room for a PS1270 size battery unless I want to do some extensive fabrication and the LiFePO4 battery fits right into my Walter Dittel battery box. I figured I would need some extra capacity as last year I installed a PowerFLARM core, LXNav Flarmview 57 and LX8080/V5 combo while keeping my Dittel FSG-50. The ship got a couple of pounds lighter, the battery is easier to install - it has to be installed through the control hookup access hatch on the fuselage of my ASW-15 - because of the lighter weight and the battery lasts longer than the 1270 size 9A/H unit it replaced. I kept flying to the beginning of November and there was no noticeable impact on performance due to the cold.