View single post by dan3192
 Posted: Thu Jul 12th, 2018 03:22 am
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dan3192

 

Joined: Thu Oct 14th, 2010
Location: Connecticut USA
Posts: 228
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Steve,

The "normal" minimum is around 3V, but I've seen protection boards touting 2.5V, a bit too low for me. My DelTang receivers shut off at 3V for a 1S arrangement, 6V for a 2S arrangement, etc.

Voltage drop-off with Lithium type batteries is a little worse than with NiMH types, which is why I prefer using a voltage regulator to maintain a constant voltage. IMO, since batteries have more capacity today than just a few years ago, I think performance is more important than the 10% or so loss in efficiency because of the regulator.

A 2S arrangement I'm using with Pamasonic 18650 x 3400mAh batteries (and 12V step-up voltage regulator) has 3 wires out to the side of the trailing (passenger) car. I use this connection to both slowly balance charge the batteries and occasionaly check cell condition. It is NOT recommended to fast charge batteries using the balance wire connection. eBay has several battery checkers that will do the job, around US$3-4.

Dan

Last edited on Thu Jul 12th, 2018 03:29 am by dan3192

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