Shikaku
ROFL THE WORD PENIS IS HILARIOUS!
Would MHa be better or would volts be?
Of course for the GP2X
Of course for the GP2X
Ravnos posted on Feb 4 2006 at 11:20 AM said:Those should do fine.
Also, if you're referring to mail-ordering as being "close to the store", I've found it's usually just as cheap to buy in-store for most things (not SD cards though <_< ) once you factor in shipping.
Squidge posted on Dec 31 2005 at 01:20 PM said:hmmm, lets do some idle tests in an attempt to find the optimal voltage
@ 2.5V = 410mA.
@ 2.9V = 340mA.
@ 3.3V = 300mA.
@ 3.4V = 290mA.
@ 3.6V = 280mA.
@ 3.7V = 270mA.
@ 3.8V = 260mA.
@ 4.0V = 260mA.
I think a battery capable of providing 3.7V is the winning one here. Who would have thought by just increasing the voltage by 1.3V, you would drop the consumption by 150mA ?
So, judging from these tests, for rechargable batteries, 3xAA (giving 3.6V) would give a LOT more playtime than 2xAA, simply due to the fact that the 2X doesn't have to waste as much energy to increase the voltage to it's preferred range.
Lets try this on mplayer:
2.5V - upto 850mA
2.9V - upto 690mA
3.1V - upto 650mA
3.3V - upto 590mA
3.7V - upto 530mA (270mA in stop mode)
Hmmm, a saving of over 300mA by just increasing the battery voltage. Nice
Ravnos posted on Feb 4 2006 at 05:06 PM said:I think for NiMH rechargeables the voltage are pretty much the same across the board. You definitely need 2500mAh at least, though. I got a pack of these and they work great. There are better brands out there, but you'll have to dig for them and they'll probably cost more. You can probably find these at a local electronics store.
Fiendicus_Prime posted on Feb 4 2006 at 11:44 AM said:I doubt they are really 1.5V since they are still NiMH chemistry, but I could be wrong.
My understanding is that all NiMH batteries start at about 1.4V at full charge, rapidly drop to 1.2V and stay there until they are nearly depleted, when the voltage drops off. It's only the capacity which differs between different NiMH batteries.
If they *were* truly 1.5V they would be better, since they have a greater capacity (1.5V * 2.5 Ah = 3.75 Wh [Watt hours] versus 1.2V * 2.5 = 3 Wh), in addition the GP2X seems to use power more efficiently at that voltage as explained in the post you quoted.
That said these sound like they would be as good as any other batteries, at least!
I don't know how anyone can get 6h out of 2300mAh. My 2 sets of 2500's get me through a 9h work day with not much to spare afterwards.Silberstein posted on Feb 4 2006 at 09:50 AM said:Ravnos posted on Feb 4 2006 at 05:06 PM said:I think for NiMH rechargeables the voltage are pretty much the same across the board. You definitely need 2500mAh at least, though. I got a pack of these and they work great. There are better brands out there, but you'll have to dig for them and they'll probably cost more. You can probably find these at a local electronics store.
What do you mean you need 2500mAh at least!? How much do you guys play? I bought a recharger with four 2300 mAh batteries, and I don't think I've ever managed to use all that batterypower. Two sets 2300 mAh is at least 6 hours playtime a day, and that is more then sufficient. (for me anyway)
Ravnos posted on Feb 4 2006 at 07:38 PM said:I don't know how anyone can get 6h out of 2300mAh. My 2 sets of 2500's get me through a 9h work day with not much to spare afterwards.Silberstein posted on Feb 4 2006 at 09:50 AM said:Ravnos posted on Feb 4 2006 at 05:06 PM said:I think for NiMH rechargeables the voltage are pretty much the same across the board. You definitely need 2500mAh at least, though. I got a pack of these and they work great. There are better brands out there, but you'll have to dig for them and they'll probably cost more. You can probably find these at a local electronics store.
What do you mean you need 2500mAh at least!? How much do you guys play? I bought a recharger with four 2300 mAh batteries, and I don't think I've ever managed to use all that batterypower. Two sets 2300 mAh is at least 6 hours playtime a day, and that is more then sufficient. (for me anyway)
Kensupen posted on Feb 4 2006 at 11:32 AM said:If you hook up 4.5v to a device designed to take 3-3.3v you WILL fry it slowly. It's basic electronics. You can get batteries that have as many amps as you can, but don't raise the voltage, or eventually it won't work at all with batteries.
-Kensupen
P.S. I took a 2 year cert in electronics, so I'm not just blowing wind in my sails.
reallynotnick posted on Feb 4 2006 at 12:59 PM said:Kensupen posted on Feb 4 2006 at 11:32 AM said:If you hook up 4.5v to a device designed to take 3-3.3v you WILL fry it slowly. It's basic electronics. You can get batteries that have as many amps as you can, but don't raise the voltage, or eventually it won't work at all with batteries.
-Kensupen
P.S. I took a 2 year cert in electronics, so I'm not just blowing wind in my sails.
Well he would only be hooking up 3.6v because each recharge able battery is only 1.2v.
PS. I took a half year of Electronics one at my high school.
(sorry I could not help myself, I just could not pass that up.)
vossy posted on Feb 4 2006 at 05:55 PM said:the word 'ansmann'
Well maybe, maybe not. I think the GP2X has a voltage regulator in there, so as long as it is within a sensible input range (definitely 2.4-3v, expect 5 is ok) it should be ok. But you'll find the power (VI) it takes is roughly constant.Kensupen posted on Feb 4 2006 at 05:32 PM said:If you hook up 4.5v to a device designed to take 3-3.3v you WILL fry it slowly. It's basic electronics. You can get batteries that have as many amps as you can, but don't raise the voltage, or eventually it won't work at all with batteries.
jedthehumanoid posted on Feb 4 2006 at 10:50 AM said:Ravnos posted on Feb 4 2006 at 07:38 PM said:I don't know how anyone can get 6h out of 2300mAh. My 2 sets of 2500's get me through a 9h work day with not much to spare afterwards.Silberstein posted on Feb 4 2006 at 09:50 AM said:Ravnos posted on Feb 4 2006 at 05:06 PM said:I think for NiMH rechargeables the voltage are pretty much the same across the board. You definitely need 2500mAh at least, though. I got a pack of these and they work great. There are better brands out there, but you'll have to dig for them and they'll probably cost more. You can probably find these at a local electronics store.
What do you mean you need 2500mAh at least!? How much do you guys play? I bought a recharger with four 2300 mAh batteries, and I don't think I've ever managed to use all that batterypower. Two sets 2300 mAh is at least 6 hours playtime a day, and that is more then sufficient. (for me anyway)
Read again, Ravnos
Shikaku posted on Feb 4 2006 at 04:23 PM said:Ravnos posted on Feb 4 2006 at 11:20 AM said:Those should do fine.
Also, if you're referring to mail-ordering as being "close to the store", I've found it's usually just as cheap to buy in-store for most things (not SD cards though <_< ) once you factor in shipping.
Well, I mean literally I could walk into that store and buy it for the price that I see right here:
http://www.tigerdirect.com/applications/Se...1168668&CatId=0
But, I just found out something nice using the search feature...
Squidge posted on Dec 31 2005 at 01:20 PM said:hmmm, lets do some idle tests in an attempt to find the optimal voltage
@ 2.5V = 410mA.
@ 2.9V = 340mA.
@ 3.3V = 300mA.
@ 3.4V = 290mA.
@ 3.6V = 280mA.
@ 3.7V = 270mA.
@ 3.8V = 260mA.
@ 4.0V = 260mA.
I think a battery capable of providing 3.7V is the winning one here. Who would have thought by just increasing the voltage by 1.3V, you would drop the consumption by 150mA ?
So, judging from these tests, for rechargable batteries, 3xAA (giving 3.6V) would give a LOT more playtime than 2xAA, simply due to the fact that the 2X doesn't have to waste as much energy to increase the voltage to it's preferred range.
Lets try this on mplayer:
2.5V - upto 850mA
2.9V - upto 690mA
3.1V - upto 650mA
3.3V - upto 590mA
3.7V - upto 530mA (270mA in stop mode)
Hmmm, a saving of over 300mA by just increasing the battery voltage. Nice
Now onto the search for finding higher voltage batteries xd