Smoothybb Posted April 29, 2014 Share Posted April 29, 2014 Bit of advice needed if possible please, (although will probably try it regardless if no one has any negative comments!!) I've just bought a E-Start Turbo Starter from a member on here and wondering if I can use a 2 cell lipo in there without any mods or worries? It should use a 7.2v stick pack but I'm not sure I have the ability to charge non-lipos anymore, certainly not without making new leads. So simple question, will 2s lipo be okay or will it cook it. Mainly asking if anyone has done it because I don't want the lipo (upto 8.4v) to cook the motor if it can't handle over 7.2v. Appreciate any help from anyone that has one or just wants to make an educated (or uneducated if necessary) guess. Quote Link to comment Share on other sites More sharing options...
Shudson Posted April 29, 2014 Share Posted April 29, 2014 (edited) Don't know about the E-Start, but I know of people that have used 12v with Rotostart 2! I think a lot might depend on loading. You might get away with light loads but a flooded engine might push the current too far. Edited April 29, 2014 by Shudson Quote Link to comment Share on other sites More sharing options...
Smoothybb Posted April 29, 2014 Author Share Posted April 29, 2014 Ooooh 3s instead, now there's a thought. Suppose I could jam a resistor in there with it maybe. Quote Link to comment Share on other sites More sharing options...
Shudson Posted April 29, 2014 Share Posted April 29, 2014 Need to be a bloody big wire-wound one and it will get hot! Maybe in winter when it would double as a hand-warmer? Quote Link to comment Share on other sites More sharing options...
Smoothybb Posted April 29, 2014 Author Share Posted April 29, 2014 God only knows, was gonna rip one of the one's on me led's off as they say they can handle input upto 20v stepped down 12v??? I'm useless with electronics, why would it turn it into a hand warmer? Is it the current draw that would cook the mini resistor from the LED's? Okay, so back to 2s then............... Quote Link to comment Share on other sites More sharing options...
Shudson Posted April 29, 2014 Share Posted April 29, 2014 Yes, it's the wattage (volts x amps) that does it. So if you were "dropping" 5v at 3 or 4 amps, that's 20w. Most "electronic" type resistors are about 1/8 watt. To get some idea of 20w, try holding a car stop-light bulb that has been lit for a while. Quote Link to comment Share on other sites More sharing options...
Smoothybb Posted April 29, 2014 Author Share Posted April 29, 2014 I see, kind of understand why it would need to be a slightly larger resistor now. So, decision now, stick to 2s or make some leads to charge a nimh. 2s sounds favourite. Quote Link to comment Share on other sites More sharing options...
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