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Model Forum / Radio Controlled / Air Models / September 2006ProPeak Prodigy II charger
Hi all, recently bought one of these chargers-I was looking for a foolproof charger for my nimh's and nicads (and maybe eventually, LiPo's)-I was assured that this was a virtual 'plug it in and forget it' type of charger. As a complete novice to batteries and charging, it sounded perfect. Sadly though, there is a requirement for a little knowlege of amps/volts/mA's etc.....example-I have a Parkzone battery pack which has on the side: 10.8v, 1000mAh (120). To set up a charge/discharge cycle I need to input certain parameters for the battery, ie 'discharge cut off voltage(?) but I'm stumped....Anyhow, what I am asking here is if anyone knows of an 'idiot's guide' to charging-(tried Googling but with no success). TIA for any help or pointers! Phil > Hi all, recently bought one of these chargers-I was looking for a > foolproof charger for my nimh's and nicads (and maybe eventually, [quoted text clipped - 9 lines] > TIA for any help or pointers! > Phil if you just want to charge set it to auto and let it set it self but dont try auto for LiPo's > if you just want to charge set it to auto and let it set it self but > dont try auto for LiPo's Hi funfly, thanks for that, but I can't see an 'auto' setting-it requires some input from the operator re charge current etc.. cheers Phil >> if you just want to charge set it to auto and let it set it self but >> dont try auto for LiPo's [quoted text clipped - 3 lines] > cheers > Phil I thought it was similar to my Mercury EX if you press the right arrow does the display then say auto charge ?? > Hi all, recently bought one of these chargers-I was looking for a > foolproof charger for my nimh's and nicads (and maybe eventually, [quoted text clipped - 9 lines] > TIA for any help or pointers! > Phil Nickel cadmium are charged at a constant current equal to their capacity divided by twenty minutes. I.e a 1000mAh pack would be charged at no more than 3A. There are no voltage implications, the charger will look for a falling voltage after it is fully charged and cut back to trickle, or off completely. Nickel metal hydride are similar, except they should be charged at the hourly rate..i.,e. 1000mAh pack should be charged at an amp. The voltage drop is similar but smaller. Lithium polymer can be charged at a current of up to their hourly rating, but there is no way to detect a full pack other than the fact it has reached a particular voltage of 4.2v per cell. i.e a 100mAh 3s LIPO pack of a nominal 11.1v can be charged at a constant one amp, and should terminate when the voltage reaches 12.6v. In practice the current tends to fall towards the full state, and it takes more than one hour. Discharge cut off voltage is when a charger is being used to check battery capacity. Set it to about 0.8v per nickel cell and abot 3v per cell for lithium. I do not recommend discharging lithium cells even that far, but if you must... > Hi all, recently bought one of these chargers-I was looking for a > foolproof charger for my nimh's and nicads (and maybe eventually, [quoted text clipped - 9 lines] > TIA for any help or pointers! > Phil I have a Prodigy I and I assume they work the same way. The instructions are not the best however: The Cycle cut off volts for NiCd or NiMH are set on the Discharge menu for that battery type. I use 1 volt per cell - so your 10.8v pack contains 10.8/1.2 = 9 cells, so I would set the discharge cut off voltage to 9 volts. My Prodigy once I figured out the stuff not in the instructions has proved to be a very versatile and useful charger on all four battery types. seabee Have a look at www.gibbsguides.com Don The message <1158700416.702059.105650@b28g2000cwb.googlegroups.com> from "MWC" <gad@lakehome.freeserve.co.uk> contains these words: > Hi all, recently bought one of these chargers-I was looking for a > foolproof charger for my nimh's and nicads (and maybe eventually, [quoted text clipped - 9 lines] > TIA for any help or pointers! > Phil Hi Phil Discharge to .9 volt per cell , some books will say .8 volt, others 1 volt , I have found .9 to be the best. Hope this helps bob > Hi all, recently bought one of these chargers-I was looking for a > foolproof charger for my nimh's and nicads (and maybe eventually, [quoted text clipped - 9 lines] > TIA for any help or pointers! > Phil Thanks to all who took the time to reply to my post, am slowly getting to grips with my new charger....! cheers Phil |
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