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DUBB

01:01:15 Tue
Jul 10 2012
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Re: Anyone have 3.7 volts (black and red) Trustfires to sell?

These were the best batteries, @ 1000mAh, but you'll need to get 2-4 packs, I didn't see these in 2's.
http://www.ebay.com/itm/4pc-x-3-2V-LiFePO4-Lithium-AA-Rechargeable-Battery-14500-1000mAh-Cell-Pack-/360464842706?pt=UK_ConsumerElectronics_Batteries_SM&hash=item53ed60ffd2
And this was the cheapest charger, even though it has 4 slots, and can do nickel batteries, as well. You'd still need 2 of them to charge all the batteries at once, though.
http://www.ebay.com/itm/Multi-LiFePo4-Li-ion-AA-AAA-14500-CR123A-18650-Battery-rechargeable-Charger-/160827253174?pt=LH_DefaultDomain_0&hash=item25720d21b6
But this is the simple solution, I think, no dummy batteries, or mixing, and as a bonus, LifePo4 batteries have an average life of 2000 charge/discharge cycles, about 4 times that of any other type of rechargable batteries. They also have twice the "C" rate of Li-ion cells, but they only have half the capacity, which nullifies the difference there. It also translates into half the use = twice the charge cycles, but since they have 4x as many of those, you still come out with twice the life expectancy.

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DUBB

00:45:12 Tue
Jul 10 2012
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Re: Anyone have 3.7 volts (black and red) Trustfires to sell?

fixed [1 edits; Last edit by DUBB at 00:59:20 Tue Jul 10 2012]

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green_dots

21:18:23 Mon
Jul 9 2012
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Re: Anyone have 3.7 volts (black and red) Trustfires to sell?

Hello Dubb.Your two links did not work. Can you reset the link or give me another way to get the info? GD.

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DUBB

05:50:12 Mon
Jul 9 2012
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Re: Anyone have 3.7 volts (black and red) Trustfires to sell?

I had a pm conversation getting Semper5's batteries happening, he went with the LifePo4 14450 cells going, and the good news is that they have a slightly lower voltage than the Li-ion cells do, and you can run 6 of them with Sergey's board, no dummies, no mixing and matching. This is what he had to say:

Quote:

Yeah, you're thinking of Li-ion batteries having a voltage of 4.2V at full charge. Lifepo4 batteries have been said to peak at 3.65V. This is another reason why you can NEVER use Lifepo4s in a Li-ion charger because the charger will put out 4.2V and damage (maybe explode) the Lifepo4s.

I know this is true for my Li-ions that do sit at 4.2V when fully charged. But I noticed my Lifepo4s sit at around 3.3V...I'm almost sure that it's my charger as there's a switch I can select for either Li-ion or Lifepo4, and respectively the switch cuts off what max voltage to charge the batteries.

They do work great, but I have to make sure the dummy battery + end is the first to contact the board because the nipples on the Lifepo4 batteries won't touch the contact on the board properly. If I do use 6 batteries I could dab a bit of solder on one battery nipple to make the contact.

So based on my readings of 3.3V on my Lifepo4s here's my calculations:

6 x 3.3V = 19.8V (w/ current voltage per battery)
6 x 3.6V = 21.6V (w/ desired voltage per battery)

So I think either way, 6 would be fine. I think I read that one should not exceed 22V to maintain safe operation and heat dissipation.

These were the best batteries, @ 1000mAh, but you'll need to get 2-4 packs, I didn't see these in 2's.
http://www.ebay.com/it

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[3 edits; Last edit by DUBB at 00:58:47 Tue Jul 10 2012]

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camracer

13:14:39 Sun
Jul 8 2012
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Re: Anyone have 3.7 volts (black and red) Trustfires to sell?

The ones I used to use were the gray Trustfire's. They are 900mAh also. I believe they are the same as the "red and black", just a different label.

---Cam

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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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green_dots

02:20:00 Sun
Jul 8 2012
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Re: Anyone have 3.7 volts (black and red) Trustfires to sell?

I found a place in Hong Kong.It may be the place I ordered the others. The shipping from HK is pretty reasonable considering the distance a one hell of a lot cheaper than those bandits in UPS. I will take a look at chkhobbypartz.com but 6 trustfires is more than enough.Fully charged they are 25.2 and over Sergey's board limit of 24 volts. GD.

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cripskillz

23:56:57 Sat
Jul 7 2012
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Re: Anyone have 3.7 volts (black and red) Trustfires to sell?

chk hobbypartz.com they got somethin that will fit and push way more current...

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green_dots

22:03:22 Sat
Jul 7 2012
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Anyone have 3.7 volts (black and red) Trustfires to sell?

I need two more Trustfires( Black,Red) 51mm .They are the 900mah ones. I don't think I can get to 2000rpm without them.These are protected, I think.I also see blue ones are they okay to use? GD.

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