i was just wondering whether or not i have to do anything to run lipos in a boat, im pretty sure i dont have to do anything special but i just want to make sure, and also how likely is it that water will get in and damage my lipo, this is the lipo im considering:
http://www.hobbycity.com/hobbycity/s..._hardcase_pack
hobbyking also has a lifepo4 2s2p pack that i could get two of and run in series, but itd be $10 more, would it be worth it?

<div>Short answer, NO.</div><div>
</div><div>
</div><div>
</div><div>Long answer. . .</div><div>
</div>LifePo packs are allot more durable and robust.  They can take a beating and be rapid charged.<div>
</div><div>LiPo's can easily be over heated and blow up if not charged properly.  They also can not be run down below 3.0 V per cell (most people stop running when they hit 3.3v/cell) or they suffer damage and will loose charge capacity dramatically.</div><div>
</div><div>Lipo's have more a better power to weight ratio, but only last about 1000 cycles and take about 1 hour to charge.  LifePo's have slightly higher power to weight ratio, but last allot longer and can be charged (with the appropriate charger) in about 15 minutes. (pack size dependent)</div><div>
</div><div>here are some quick stats from the powerfull wikipedia;</div><div>
</div><div>LifePO;</div><div><span style="font-family: sans-serif; font-size: 13px; line-height: 19px; "><table style="font-size: 11px; color: black; background-color: rgb(249, 249, 249); border-top-width: 1px; border-right-width: 1px; border-bottom-width: 1px; border-left-width: 1px; border-top-style: solid; border-right-style: solid; border-bottom-style: solid; border-left-style: solid; border-top-color: rgb(170, 170, 170); border-right-color: rgb(170, 170, 170); border-bottom-color: rgb(170, 170, 170); border-left-color: rgb(170, 170, 170); margin-top: 0.5em; margin-right: 0px; margin-bottom: 0.5em; margin-left: 1em; padding-top: 0.2em; padding-right: 0.2em; padding-bottom: 0.2em; padding-left: 0.2em; clear: right; width: 22em; text-align: left; line-height: 1.5em; " cellspacing="5" class="infobox"><tr><th style="vertical-align: top; text-align: left; ">Time durability</th><td style="vertical-align: top; ">&gt;10 years</td></tr><tr><th style="vertical-align: top; text-align: left; ">Cycle durability</th><td style="vertical-align: top; ">2,000 cycles</td></tr><tr><th style="vertical-align: top; text-align: left; ">Nominal cell voltage</th><td style="vertical-align: top; ">3.3 V</td></tr></table>and LiPo;</span></div><div><font size="3" face="sans-serif"><span style="font-size: 13px; line-height: 19px;"><table style="font-size: 11px; color: black; background-color: rgb(249, 249, 249); border-top-width: 1px; border-right-width: 1px; border-bottom-width: 1px; border-left-width: 1px; border-top-style: solid; border-right-style: solid; border-bottom-style: solid; border-left-style: solid; border-top-color: rgb(170, 170, 170); border-right-color: rgb(170, 170, 170); border-bottom-color: rgb(170, 170, 170); border-left-color: rgb(170, 170, 170); margin-top: 0.5em; margin-right: 0px; margin-bottom: 0.5em; margin-left: 1em; padding-top: 0.2em; padding-right: 0.2em; padding-bottom: 0.2em; padding-left: 0.2em; clear: right; width: 22em; text-align: left; line-height: 1.5em; " cellspacing="5" class="infobox"><tr><th style="vertical-align: top; text-align: left; ">Time durability</th><td style="vertical-align: top; ">24–36 months</td></tr><tr><th style="vertical-align: top; text-align: left; ">Cycle durability</th><td style="vertical-align: top; ">&gt;1000 cycles</td></tr><tr><th style="vertical-align: top; text-align: left; ">Nominal cell voltage</th><td style="vertical-align: top; ">3.7 </td></tr></table>
</span></font></div><div><font size="3" face="sans-serif"><span style="font-size: 13px; line-height: 19px;">So, to  answer your question.  No you don't have to do anything.  Just don't run them down to low or they will break.</span></font></div>

one of the big things with liFePo4 is the fact they have less votls.. decent power loss over lipo of about 10-12%
and with the charging time with LiFepo4 say like this pack http://www.hobbycity.com/hobbycity/s...C_LiFePo4_Pack with a 5A charger your battery will still take 54min to put back 4500mah
you will only have the 15min fast charges if you have the charger to support that
and most chargers have a 5A max setting

ok i also heard that at a certain number of amps or volts or something along those lines that deans plugs become ineffective and bullet connectors become the best choice, is that true?

and does whether the lipo is hard or soft case matter? what i mean is would it be worth the extra money to buy a hardcase over a softcase?

hardcase lipo's will just add weigth to the boat, there mainly used for rc car's so go with the soft case lipo's, 5.5mm bullet connectors are great because they handle upto about 150a +

would bullet connectors be necessary on this boat running with a 4s lipo and stock prop and electronics?
http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=11853&amp;Product_Name=P ursuit_Brushless_V-Hull_R/C_Boat_(820mm)_Plug-n-Drive

The hard case is for cars and trucks on the track, they are required for racing at most events..
you can use a hardcase but the extra money you could save and go with the soft packs..

Deans are good and can actually handle a good amount of amps, but being most batteries from HC come with bullits you are better off getting some extra 5.5mm and changing things over
they are easy to solder and can handle more amps and run cooler
there are lots of videos on youtube with very fast Monster Trucks running some fast mph numbers using deans, so they do work

If you keep it stock you will not need Deans..
BUT... the stock electronics will not last from what I've heard, biggest reason I will not ship any in to sell
But I may imports a few to install the new Leopard motor and sell!

ok thx for the info, when i get around to upgrading the pursuit ill make sure to get some 5.5 connectors

very easy to solder..

don't push your stuff on me Rico!

Go for Lipo, they are more common and easy to use. I also second the bullet connectors. Just solder them on.
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Hello, I have a old viper Hydro and ran on 12 cell nmhd and want to
run lipo She has a barracuda 80 esc? will I be able to use it???
I want to run 14.8 30 c 5000 mah 442x prop????

any Idea's?????


thanks ken

Also is 30c to hi??? had a Friend with a Barracuda Esc and fryed somthing on 35c???

I have ran 20c 14.8 and was ok!!!


thanks again

Ken

It depends on your setup.. you can blow things with 15C packs
I use a minimum of 30c in everything I own, and I'm about to start running parallel to double my amps

Can you explain to me about 30c lipo's ??
will you draw more amps with 30
then 20c ?? when i go 35 do i need
a bigger ESC! like 150 to 200??

thanks ken

Also my set up is a 10L motor 80 Barracuda, 442x octura and two venom 3800 Mah 35c or in series making 14.8 volts

also have two 4000mah 30c venom packs to run in series and think i need a bigger Esc???


thanks ken

It's the motor that pulls what it needs, not the batteries..
the batteries supply the amps to the esc that goes to the motor
if your motor pulls 1,000amps you will need a bigger esc, if it only pulls 40amps ????

what boat are you running this in?????????????????????

I run 5000mah 30c packs in my SV27s and that esc is rated to 45amps!!!!!!!!!!!!!
I'm about to buy 4s 4000mah 20c packs and run them in parallel to get longer runtimes and have double the amps!
the more amps the batteries can deliver the cooler the esc and motor will run, and also the batteries will last longer and take more charges becasue they are not being worked as hard

Thank you! for the Info If you are going parallel you are dropping in volts???and upping the Mah
Is that correct? or are you getting higher cell packs to keep the same voltage??

Thanks ken

you don't drop volts...
two 4s packs in parallel is still a 4s volt setup (14.8v)
same a two 2s packs in series is a 4s volt setup (14.8)
two 4s 4000mah 20c packs in parallel = 14.8v 8000mah of runtime and 160amps of contiuous. power

Also what is the advantage of a higher c rating???


thanks again!


ken

The higher the C rating the more amps the batteries can deliver..
several good things happen with high C packs
1) the packs run cooler, and longer before the LVC kicks in
2) the esc run cooler because their are less voltage spikes
3) the motor runs cooler also
oh and 4) MORE POWER!!!
boats pull lots of amps so the more you can give it the faster it will be