Over discharging lipos - RC-Monster Forums

Scott711 · **Over discharging lipos -** 01.12.2006, 06:23 PM

For those of you using lipos, how do you prevent your lipos from getting over discharged when out bashing around? I've always run my nimh's down untill I noticed the truck slowing down but from what I read it's really bad to discharge lipos below 3 volts. Is there a piece to the puzzle that I'm missing?

squeeforever · 01.12.2006, 06:30 PM

three little letters...LVC (low voltage cutoff). if will start beeping or a light will come on usually around 3.2 volts i think. a good one is the li-saver

crazyjr · 07:00 PM

the Li-saver actually pulses the motor when its time to stop, kind of like the Scorpion LVC. I think these are better than the light-up one cause you might not notice the light going out

Scott711 · 01.12.2006, 07:38 PM

That looks like a sweet little setup. I'm glad I asked, I'm getting ready to drop $250 on a set of 3s lipos and I'd hate to ruin them because I lost track of time. Looks like you just solder them in on the battery side of your deans connectors, right? Thanks for the info.

crazyjr · 01.12.2006, 08:22 PM

The esc side. if you soldered to the battery you would have a hard time removing the battery

Scott711 · 01.12.2006, 09:52 PM

LOL.........Now that I picture it in my mind yeah that would make it kind of difficult. Thanks

MetalMan · 01.12.2006, 11:46 PM

I've actually located a LVC that in a sense is better than the Li-Saver:
http://www.dimensionengineering.com/LipoShield.htm
The only problem with it is that it's a soft cutoff, but this is better for racing conditions than a hard-cutoff (where the throttle is cut). Usually a decrease in throttle is pretty noticable.

01.13.2006, 12:56 AM

After driving with lipos whats the voltage? after i drive around with my nimh packs i stop when i truck moves just a bit faster than walking and the voltage is always around 8.7

Scott711 · 01.13.2006, 01:06 AM

Geezzz MM where do you find these off the wall places and products. I consider myself pretty good at searching the internet but you always amaze me. Have you used that LVC? You haven't steered me wrong yet so maybe I'll give'em a try they're 5 bucks cheaper to boot.

For anyone whose looking for a inexpensive charger I found a good deal on the Hyperion EOS 5i Charger & LBA6 Balancer Combo for 109.95. Seems to be the best price I could find in a combo deal.

http://www.b-p-p.com/proddetail.php?prod=d_EOS_5I

MetalMan · 01.13.2006, 10:00 AM

Let's just say that I am part of a rather large airplane battery community that gets all of the Lipo attention from manufacturers :).

The main reason why this LVC has caught my interest is because it's $5 cheaper than the Li-Saver, and I know the company that makes it is very good.

Looks like you did some work, that deal for the EOS 5i/LBA6 is $10 cheaper than buying separate.

Scott711 · 01.13.2006, 11:07 AM

Yeah, I've also found the airplane sites very informative when it comes to lipos. I'm cosidering trying my hand at helicopters this summer if I can swing it. Thanks again for your help.

crazyjr · 01.15.2006, 07:40 PM

Quote:

Originally posted by MetalMan
I've actually located a LVC that in a sense is better than the Li-Saver:
http://www.dimensionengineering.com/LipoShield.htm
The only problem with it is that it's a soft cutoff, but this is better for racing conditions than a hard-cutoff (where the throttle is cut). Usually a decrease in throttle is pretty noticable.

thanks MetalMan, another good option