Need some battery advice

brad72

Newly Enlightened
Joined
May 25, 2009
Messages
80
Location
Queensland, Australia
Hi,

Well i finally took the plunge and picked up some gear from cutter's so I can machine up some new bike lights, 1 for the bar and 1 for the helmet.

I ended up with : -2 x series wired 20mm triple XP-E
-2 x 700ma buckpucks with external pot
-carlo narrow and medium optics
-2 x 14.8v 2200mah lipo's

My question is based on the vF of the leds @ 700ma being 3.4v x 3=10.2v plus 2v for the buckpuck = 12.2v, could i use a fresh 11.1v lipo battery (12.6v fully charged) as a back up battery just in case one of the primary batteries fails. This would let me save some money as I have a few 11.1 lipo's left over from the rc heli days

Would the above scenario cause any problems with the buckpuck working correctly when the 3s lipo battery voltage dropped below 60% charge (~12.0v)?
 
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