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Author Topic: Batteries  (Read 912 times)

Offline Richthofen

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Batteries
« on: March 20, 2011, 10:17:38 AM »
I have a Dboys Ak74 W/metal gearbox. It is stock, so is it ready for a 7.4 or 11.1 lipo? i dont want to shred my gearbox and pistons, but the stick batteries i have don't last very long and don't shoot fast enough for me so i figured i might try a lipo. Just wondering if it is ready.
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Offline axisofoil

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Re: Batteries
« Reply #1 on: March 20, 2011, 10:18:42 AM »
Mine held up for a while with an 11.1. Then shredded the piston.
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Offline Rogue Fox

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Re: Batteries
« Reply #2 on: March 20, 2011, 01:58:44 PM »
it can handle a 7.4 just as most guns can. Most 7.4s come out to around the same ROF as a 9.6 would give you.
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Offline Richthofen

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Re: Batteries
« Reply #3 on: March 20, 2011, 07:04:36 PM »
Alright i have a 9.6 in there right now, so i wont see any major change in rof but how long will a 7.4 lipo last?
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Offline axisofoil

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Re: Batteries
« Reply #4 on: March 20, 2011, 07:08:24 PM »
Quote from: "Richthofen"
Alright i have a 9.6 in there right now, so i wont see any major change in rof but how long will a 7.4 lipo last?

Somewhere between 1 and 6,000,000,000,000 shots. Should be similar to a 9.6 with the same mAh rating.
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Offline XavierMace

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Re: Batteries
« Reply #5 on: March 20, 2011, 07:31:45 PM »
Quote from: "axisofoil"
Quote from: "Richthofen"
Alright i have a 9.6 in there right now, so i wont see any major change in rof but how long will a 7.4 lipo last?

Somewhere between 1 and 6,000,000,000,000 shots. Should be similar to a 9.6 with the same mAh rating.

Actually, it should be a bit higher as the LiPo generally is not going to be taxed as close to it's limit and therefore is more efficient.
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Offline axisofoil

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Re: Batteries
« Reply #6 on: March 20, 2011, 10:20:15 PM »
Quote from: "XavierMace"
Quote from: "axisofoil"
Quote from: "Richthofen"
Alright i have a 9.6 in there right now, so i wont see any major change in rof but how long will a 7.4 lipo last?

Somewhere between 1 and 6,000,000,000,000 shots. Should be similar to a 9.6 with the same mAh rating.

Actually, it should be a bit higher as the LiPo generally is not going to be taxed as close to it's limit and therefore is more efficient.

Probably correct... I've never drained a lipo fully to know for sure. Sensible enough.

I've seen people use the same # of shots/mAh to keep from over-discharging. Either way, you need more information about the battery/gun combo before we could get anywhere close to telling you how long it would last...
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Offline Shadow

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Re: Batteries
« Reply #7 on: March 21, 2011, 08:46:02 AM »
I would recommend getting a MOSFET for the lipo.  I've already gone through a set of trigger contacts with mine.  Switched back to 9.6v until I get one.
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Offline axisofoil

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Re: Batteries
« Reply #8 on: March 21, 2011, 09:41:06 AM »
Quote from: "derekr44"
I would recommend getting a MOSFET for the lipo.  I've already gone through a set of trigger contacts with mine.  Switched back to 9.6v until I get one.

I'm still waiting to see someone post pics of their burned out trigger contacts.
I recommend mosfets for a myriad of reasons, trigger contacts have never been one.
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Offline Shadow

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Re: Batteries
« Reply #9 on: March 21, 2011, 10:31:07 AM »
I fired about 200 shots before it stopped.  When I opened the gearbox, the contacts and surrounding plastic were charred black.

I should have taken photos.
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