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Sergey_new_pcb

DUBB

07:17:33 Sat
Aug 4 2012
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Re: Using lipo's ?

That stock board has a 16v capacitor, you were cutting it awefully close. Whewwww...............

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Shootureyeout

06:32:26 Fri
Aug 3 2012
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Re: Using lipo's ?

Yes. Thanks Cam. it was reading 15.6 . I just ran them down to 14.6 on one of my ducted fan motors for my rc jet.

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camracer

13:09:24 Thu
Aug 2 2012
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Re: Using lipo's ?

Quote: Shootureyeout at 05:14:43 Thu Aug 2 2012

I think I'm going with your recommendation I'm fed up with the lipo's not worth the trouble I have some 3.6 ultra fires and i also made the mistake and bought some trustfire protected and they don't work. I have just finished my custom mods ( SEE POST) and I'm using 6nickel cad and 2 saft LS 14500 in a battery compartment i bought at radioshack. so 6 nc at 1.2 and 2 14500 at 3.6 . I need some help now with pressure want to stay with the 13ci so should I just bump up to 1200. or go to 1600psi I guess I have to reinforce the mag also

Keep in mind that fully charged batteries have higher than rated voltage! Check it out on a digital multimeter... Those NiCad's will be around 1.5v and the 14500's around 4v.

---
2010 DROZD TACTICAL ASSAULT RIFLE: 2010 regular Drozd, 23" JimC tactical rifle barrel, JimC AR stock, Leapers 3-9x32 "Bug Buster" scope, Walther tactical laser/light combo, Fab Defense T-Pod tactical foregrip, Sergey's 2000rpm custom full-auto circuit board, Prototype AR style 9500 round dual drum magazine

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camracer

13:04:56 Thu
Aug 2 2012
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Re: Using lipo's ?

Quote: Shootureyeout at 06:20:29 Thu Aug 2 2012

does 15.v give you more power even if your running 850psi or 1000psi . it seems like it should cause its hitting the solenoid harder

Yes it does.

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Shootureyeout

06:20:29 Thu
Aug 2 2012
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BBMG Sergeant
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Re: Using lipo's ?

does 15.v give you more power even if your running 850psi or 1000psi . it seems like it should cause its hitting the solenoid harder

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DUBB

05:46:09 Thu
Aug 2 2012
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Re: Using lipo's ?

For a stock board you might want to go with 4, unprotected 14500 LifePo4 cells and 2 dummies. That should give you 14.4v. Another idea I considered was using 12, 1/2 AA nicads, that will give you the same.

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Shootureyeout

05:22:46 Thu
Aug 2 2012
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BBMG Sergeant
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Re: Using lipo's ?

I never thought of this important question but what is the amp rating on the stock bb max board. I just about fell over when I realized I was trying stuff out with no regard to the amperage. you guys get to know me you"ll figure out I'm like Rick Moranis on Honey I shrunk the Kids. No regards for safety. Not intended though

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Shootureyeout

05:14:43 Thu
Aug 2 2012
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BBMG Sergeant
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Re: Using lipo's ?

I think I'm going with your recommendation I'm fed up with the lipo's not worth the trouble I have some 3.6 ultra fires and i also made the mistake and bought some trustfire protected and they don't work. I have just finished my custom mods ( SEE POST) and I'm using 6nickel cad and 2 saft LS 14500 in a battery compartment i bought at radioshack. so 6 nc at 1.2 and 2 14500 at 3.6 . I need some help now with pressure want to stay with the 13ci so should I just bump up to 1200. or go to 1600psi I guess I have to reinforce the mag also

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camracer

23:31:08 Wed
Aug 1 2012
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5035 posts
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Re: Using lipo's ?

Quote: DUBB at 13:04:27 Wed Aug 1 2012

You know you can get charge/discharge protection boards for packs like yours, although I have had zero luck with the smaller ones I have tried. The idea would be to wire it to a balancing jack, so that the pack can just plug into it, and have it hard wired permanently into the drill pack shell. That way you don't need a soldering iron if you need to change the pack once in awhile. Lipo's only have something like 200-500 charge cycles in them. I think nicads are about twice that, and the big winner is LifePo4 with 2000 charge cycles, which is why they are becoming the new hot ticket for cordless tools. But they give up energy density to lipos, and the way we are doing it, with the cheap packs from HK, once you have the drill pack shell set up so you can just replace the pack, our way is cheaper, lighter, and a bunch more power than anything out there. Nice thing about the pcb is that unlike your alarm, they can stay wired up full time without a residual drain, and you could still use the original charger, if you needed to. Also, if some dumbass tries to use that original charger, it wont blow up. The thing with these is when the batteries are discharged, it just quits, like a fuse blew, and will probably not feel much different than full charged when they do.

Heh! ...200-500 charge cycles...... That would last me ...TEN YEARS on the 8000mAh LiPo's I am using....... Seriously! You are the KING of batteries DUBB! Hope everyone reading this will ask your advise!!! I for sure took it! :wink:

Let me know if any of you out there wanna see what the ultimate external battery pack looks like....

---Cam [1 edits; Last edit by camracer at 13:02:19 Thu Aug 2 2012]

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DUBB

13:04:27 Wed
Aug 1 2012
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2356 posts
BBMG LIFE BLASTER +2000

Re: Using lipo's ?

You know you can get charge/discharge protection boards for packs like yours, although I have had zero luck with the smaller ones I have tried. The idea would be to wire it to a balancing jack, so that the pack can just plug into it, and have it hard wired permanently into the drill pack shell. That way you don't need a soldering iron if you need to change the pack once in awhile. Lipo's only have something like 200-500 charge cycles in them. I think nicads are about twice that, and the big winner is LifePo4 with 2000 charge cycles, which is why they are becoming the new hot ticket for cordless tools. But they give up energy density to lipos, and the way we are doing it, with the cheap packs from HK, once you have the drill pack shell set up so you can just replace the pack, our way is cheaper, lighter, and a bunch more power than anything out there. Nice thing about the pcb is that unlike your alarm, they can stay wired up full time without a residual drain, and you could still use the original charger, if you needed to. Also, if some dumbass tries to use that original charger, it wont blow up. The thing with these is when the batteries are discharged, it just quits, like a fuse blew, and will probably not feel much different than full charged when they do.
http://www.all-battery.com/PCBfor22.2vli-ionbatterypack6cell-32015.aspx
http://www.all-battery.com/PCBfor6CellsLi-Ion_Li-PolymerPacks_6AWorkingand10ACut-off-3http://www.ebay.com/sch/?_from=R40&_trksid=p3907.m570.l1313&_nkw=22.2v+battery+pcb&_sacat=See-All-Categories
2116.aspx

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camracer

14:32:16 Tue
Jul 31 2012
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Re: Using lipo's ?

Quote: DUBB at 01:55:32 Tue Jul 31 2012

Yeah, but for a 3S pack, the overdischarge voltage is just 9v, I should think that would be hard not to notice. And he has a voltage meter mod, now, he certainly knows what he is doing. We all had that wierd issue with lipos, those of us that tried them, at least with the stock board. For some reason draining them off a little bit seems to make them work, I have no clue why that is, though.

Say, did you ever try reconditioning the old nickel packs for your drill on the charger that you bought for the lipo? That thing can do wonders for old nickel batteries, too, you know. I do that for people from time to time, those packs are outrageous. Now I know why you didn't hesitate to convert one dead one to lithium. It was probably a damn good investment, relatively. You know that those nickel packs only run about 1500mAh, or so. What a joke, by comparison. No wonder those construction types have to have their chargers on the site with them, they must have to rotate at least once a day. Garbage, I say.

BTW, if you happen to be one of those construction types, or know any personally, battery pack reconditioning/preservationing service is great as well as easy side money. Put a tripple cycle on those suckers, if that doesn't do it, nothing will. I have made good dough replacing the nickel cells in those things too, since that is still cheaper than an entire new pack costs. And you can usually buy better cells than the originals ones, too. Converted Nicad to Nimh a couple of times, too. They don't suffer the same battery memory troubles. At least not as bad, anyway. Nimh seems to be better suited for those guys that don't 100% discharge every time, and they aren't an option for all brands of tools.

No I didn't even bother to try. Just tossed them in the trash! I would never wan

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DUBB

01:55:32 Tue
Jul 31 2012
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2356 posts
BBMG LIFE BLASTER +2000

Re: Using lipo's ?

Yeah, but for a 3S pack, the overdischarge voltage is just 9v, I should think that would be hard not to notice. And he has a voltage meter mod, now, he certainly knows what he is doing. We all had that wierd issue with lipos, those of us that tried them, at least with the stock board. For some reason draining them off a little bit seems to make them work, I have no clue why that is, though.

Say, did you ever try reconditioning the old nickel packs for your drill on the charger that you bought for the lipo? That thing can do wonders for old nickel batteries, too, you know. I do that for people from time to time, those packs are outrageous. Now I know why you didn't hesitate to convert one dead one to lithium. It was probably a damn good investment, relatively. You know that those nickel packs only run about 1500mAh, or so. What a joke, by comparison. No wonder those construction types have to have their chargers on the site with them, they must have to rotate at least once a day. Garbage, I say.

BTW, if you happen to be one of those construction types, or know any personally, battery pack reconditioning/preservationing service is great as well as easy side money. Put a tripple cycle on those suckers, if that doesn't do it, nothing will. I have made good dough replacing the nickel cells in those things too, since that is still cheaper than an entire new pack costs. And you can usually buy better cells than the originals ones, too. Converted Nicad to Nimh a couple of times, too. They don't suffer the same battery memory troubles. At least not as bad, anyway. Nimh seems to be better suited for those guys that don't 100% discharge every time, and they aren't an option for all brands of tools. [2 edits; Last edit by DUBB at 02:07:46 Tue Jul 31 2012]

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camracer

23:14:58 Sat
Jul 28 2012
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5035 posts
BBMG LIFER

Re: Using lipo's ?

DUBB is "king of LiPo's" here. He will answer your questions...

DUBB, LiPo's shouldn't be allowed to drop below a "cut-off voltage" right...

That's why you told me to put the "warning" buzzer on my pack right??

BTW, that 8000mAh pack hasn't even had a hint of being drained out to that point yet!!!!

---Cam

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Shootureyeout

20:04:20 Sat
Jul 28 2012
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Using lipo's ?

I recently got one of my ultrafires stuck in compartment. long story short I now am using my radio controlled lipo's 11.1v in the stock of my drozd. they are 1000mah. at a full charge they have 12.4 v. when I use a fully charge one I can fire on single shot continuously, but on 3 burst or full auto it fires about three shots and dies but power light stays on . I was so puzzled because when I tried it out at first they gun fired flawless. so I put another lipo same battery just not fully charged about 11.v and it worked perfect. is my amps to much and why only fire on single shot?. once it goes over to full auto it stops firing even when i select single fire it won't work until I unplug and re plug then it will fire on single shot again. but with less of a charge it works ok. I think capacitor is shutting down cause power light stays on. just don't want to burn up so I am waiting for some feedback. I know I can go to 15.v and I have heard that lipo's alone sometimes won't work? maybe I miss read the post. but I am guessing that my amps are weaker in the less charged battery around 700 mah.

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