Thanks Mike!
Cheers, WPP > On 2 Sep 2014, at 11:11, Mike Borgelt <[email protected]> wrote: > > 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 >> _______________________________________________ >> Aus-soaring mailing list >> [email protected] >> To check or change subscription details, visit: >> http://lists.internode.on.net/mailman/listinfo/aus-soaring > Borgelt Instruments - design & manufacture of quality soaring instrumentation > since 1978 > www.borgeltinstruments.com > tel: 07 4635 5784 overseas: int+61-7-4635 5784 > mob: 042835 5784 : int+61-42835 5784 > P O Box 4607, Toowoomba East, QLD 4350, Australia > > _______________________________________________ > Aus-soaring mailing list > [email protected] > To check or change subscription details, visit: > http://lists.internode.on.net/mailman/listinfo/aus-soaring
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