Malkoff: Would these be dangerous

[tricker]

http://www.all-battery.com/index.asp?PageAction=VIEWPROD&ProdID=1015
plus this
http://www.malkoffdevices.com/shop/index.php?main_page=product_info&cPath=2_7&products_id=18

the bulb draws quite a good current and was wondering if this would be an unsafe set up

 

[jugg2]

LifePO4 is a very safe battery chemistry. The only downside would be runtime.

 

[tricker]

thank you.....didn't want to carry a pipe bomb around with me

 

[Aussie Cheese]

it wont work, the malkoff draws more current than the batteries can handle.

 

[jugg2]

Are you sure? LifePO4 are capable of some incredible discharge rates. The Malkoff will only be pulling slightly over 1C at 6V; that is a very light load for these cells.

 

[Aussie Cheese]

well, quite sure, my malkoff Q4 pulls about 680ma on primaries

according to the website:

Maximum discharging rate:< 550 mA

i would say the M60L would be pushing the limit of these batteries, M60LL would be ideal.

hope that helps.

Are you sure? LifePO4 are capable of some incredible discharge rates. The Malkoff will only be pulling slightly over 1C at 6V; that is a very light load for these cells.

 

[NA8]

Try these:

http://www.lighthound.com/index.asp?PageAction=VIEWPROD&ProdID=2583

They can discharge a lot, like 5 amps. See the discharge curves graph and other info in this thread.

http://www.cpfmarketplace.com/mp/showthread.php?t=125353

LiFePO4 runtimes will be short though the AW 500mAh battery will outlast the Tenergy "750mAh" battery.

 

[LEDninja]

The Tenergy LiFePO4 is rated max discharge of 550mA.
The Malkoff is rated 780 mA, well above that.
I would not use that combo.

 

[jugg2]

Sorry for questioning you Aussie. I didn't see that they were only rated for 550mah discharge, I figured they were like most LifePO4 cells.

My humble apologies.

 

[tricker]

if i run this in a two cell set up would that make a difference.....from my little knowledge of circuits i kow voltages add and so do resistors in a series......so would two batteries be enough to run this, i know the voltages are ok

also i found this from AW himself, in response to a question about LiPO4 cells

Spacemarine : RC people have been discharging PO4 cells routinely up to 10C without any problem to the cells. However, I don't think you'll get much runtime out of these 500mAH cells.