Adam,
It looks to be a motorcycle/race car starting battery. Different duty
cycle from glider batteries.
The lithium technology is unmentioned. Anything that isn't LiFePO4
(lithium iron phosphate) probably shouldn't be used in aircraft. Ask
Boeing. The subcontractor for the 787 battery management system
managed to burn down their building during testing.
Even with LiFePO4 you'll need the right charger and a monitoring system.
I've got a couple of 4 cell packs of
these:http://www.all-battery.com/Tenergy3.2V15Ah40152SLiFePO4EnergyCellRechargeableBattery-30078.aspx
for 30 A-h at 13 volts for 4KG mass.
Diode connected MOSFETS to put the packs in parallel (I have some
spare circuit boards to make those. Only 3 components per board).
That way if you lose or have a weak cell in one pack that pack will
go offline automatically.
Underwriter Labs tested - the test schedule is on the website if you
look around. Quite impressive
A friend of mine is successfully using a pack of four for starting a
half VW engine in an ultralight.
Mike
At 10:48 AM 2/09/2014, you wrote:
Hello All,
Found these while looking for replacement batteries. Pictured here
is a G7 (7ah), but they have it in G9 too.
The sales person tells me that the G9 is equivalent to a 6AH regular
glider battery. Weight only 0.9kg!
What are peoples thoughts that are in the know?
$399 + a $217 charger. An expensive investment, but would go ahead
with it if I knew it was the goods I was looking for.
Info here:
http://www.braillebattery.com/index.php/braille/product_batteries/g9
Cheers,
WPP
Found at shop: www.allstarbatteries.com.au ; Brendale, QLD
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