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Model Forum / Radio Controlled / Land Models / December 2003How many times to recharge a battery in one day?
As I pour over all the info I can find, I've come across people mentioning that the higher end battery packs can be recharged 2 or even 3 times per day. I didn't realize this was an issue. I thought if I bought, say, 4 packs and a twin charger, I could charge up all 4, run them, and always have two of them on the charger while running the others. What's the scoop? Is it just a mater of cooling them down before recharging them? Its a matter of letting the batteries stabilize before you recharge them, which takes longer than the cool-down phase. But if you do choose to charge them they will still work. They'll just crap out after a year instead of lasting three. Those are just rough numbers.  SignatureJustin Mahn remove Panties to e-mail > As I pour over all the info I can find, I've come across people > mentioning that the higher end battery packs can be recharged 2 or [quoted text clipped - 6 lines] > What's the scoop? Is it just a mater of cooling them down before > recharging them? >Its a matter of letting the batteries stabilize before you recharge them, So then how long do you wait for them to stabilize? Is that something that the charger will detect and indicate? I think I'm getting the Dynamite Twin Peak charger for Christmas. I just want to make sure I'm set for hours (not minutes) of action. :-) > >Its a matter of letting the batteries stabilize before you recharge them, > [quoted text clipped - 4 lines] > I just want to make sure I'm set for hours (not minutes) of action. > :-) If you want hours of action bear in mind that any motor will have it's limits and that with extended run times expecially if the motor is getting hot you're gonna wear the crap outta the brushes and the commutator. If you want hours of action have 4 3300's with your Twin Peak, charge them all, use a small fan on them while charging to keep them cooler. As you dump a battery let it cool under tha fan, then recharge it. As another poster said you might not getyears outta the battery doing this but you will have fun. >another poster said you might not getyears outta the battery doing this >but you will have fun. Thanks for the tips. I remember about 10 years ago I was servicing a machine that builds NiCad batteries down in Gainesville, Florida. Thousands upon thousands of cells everywhere you looked. If I'd only known then..... Just as well. If you still had those thousands of cells, they still would be 10 year old cells. :) SignatureJustin Mahn remove Panties to e-mail > >another poster said you might not getyears outta the battery doing this > >but you will have fun. [quoted text clipped - 7 lines] > > If I'd only known then..... >>Its a matter of letting the batteries stabilize before you recharge them, > > So then how long do you wait for them to stabilize? Received wisdom among those of us who race is that you should only run nicads (1700s, 2000, 2400s) once a day - hence we have six or eight packs of the damn things! NiMH cells (3000s and 3300s) can be used twice a day, and are reputed to perform better on the second run. As has already been said, it's mostly about lifespan (and drop-off in performance with age) of the packs. To give you some idea, nearer the beginning of this year (2003) I realised that some 2000s - which I'd been racing two or three times a month on average since the beginning of 1999 - were definitely 'past it' for racing, although would still be fine for practice and/or bashing. However, I can't say how much sooner they'd have died if I'd run them more than once a day, because I didn't :-) > Is that something that the charger will detect and indicate? 'Fraid not. HTH a little, Jonny > I didn't realize this was an issue. I thought if I bought, say, 4 > packs and a twin charger, I could charge up all 4, run them, and > always have two of them on the charger while running the others. > What's the scoop? Is it just a mater of cooling them down before > recharging them? You definitely need cool-down time after running and after charging. The cells are hotter on the inside than the outside; even if they seem only slightly warm on the outside, they may be very warm on the inside. Several times I've run my packs, taken them out of the truck, and thought "hey, these seem pretty cool". Then I touch the metal terminal on the end of the pack and -- yikes! -- they are much hotter than I thought. If you're not racing, feel free to charge and discharge them as many times as you want in a day with cool-down time between use. The charging issues only affect racing, where multiple charge/discharge cycles cause the packs to get a little slower at the end of the day. Rick R. > As I pour over all the info I can find, I've come across people > mentioning that the higher end battery packs can be recharged 2 or [quoted text clipped - 3 lines] > packs and a twin charger, I could charge up all 4, run them, and > always have two of them on the charger while running the others. I just use a fan to cool the charger/batts and run the heck outta them. But then again I'm not a racer squid. SignatureL.V.X., brother mouse http://www.mousetrap.net/otr/ Old Time Radio trades http://makeashorterlink.com/?K16312E06 CBS Radio Mystery Theater database http://greyhound.mousetrap.net/altus/ retired racing dog |
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