Power your GBA for a week! [Pics inside]

tysonDS · Post by **tysonDS** » Sat Dec 13, 2008 2:46 am

cleared

Post by **Skyone** » Sat Dec 13, 2008 3:17 am

Not to be an ass, but here, you've got a twisted outlook on electronics.

tysonDS · Post by **tysonDS** » Sat Dec 13, 2008 3:23 am

cleared

tysonDS · Post by **tysonDS** » Sat Dec 13, 2008 5:14 am

cleared

Valium · Post by **Valium** » Sat Dec 13, 2008 6:28 am

Would probably hinder the whole handheld dealy with D batteries strapped to the back.

tysonDS · Post by **tysonDS** » Sat Dec 13, 2008 7:16 am

Hi Valium, I did it so the 2 D cells sit in my pocket (taped together) and a long wire (heatshrink) runs to the battery compartment.

I need to find a better way of doing it than alligator clips tho

themadhacker · Post by **themadhacker** » Sat Dec 13, 2008 9:55 am

tysonDS wrote: I need to find a better way of doing it than alligator clips tho

Soldering?

vskid · Post by **vskid** » Sat Dec 13, 2008 10:31 am

themadhacker wrote:
tysonDS wrote: I need to find a better way of doing it than alligator clips tho
Soldering?

Soldering to batteries can be kinda risky, you can easily kill them if you aren't fast enough. I'd just get a battery holder.

I'll give a quick explanation about increasing voltage/amp hours with multiple batteries.
Series - Wired positive to negative, positive to negative (only one path). Increases voltage, amp hours stay the same.
Parallel - Wired positive to positive, negative to negative (multiple paths). Increases amp hours, voltage stays the same.
Something to remember, if you have the same amount of batteries, its always the same amount of power. A 1.5v, 2Ah battery has 3Wh (watts) of power (v*Ah=Wh). If you put 2 in series, then its 3v, 2Ah, 6Wh. 2 in parallel, 1.5v, 4Ah, still 6Wh.
And amps are drawn, the game boy will only draw as many as it needs (LEDs are an exception to that rule). So having batteries with high Ah ratings won't hurt anything.

tysonDS · Post by **tysonDS** » Sat Dec 13, 2008 6:14 pm

deleted

Bibin · Post by **Bibin** » Sat Dec 13, 2008 8:14 pm

It shouldn't be eating your batteries; my battery life is hardly any worse than it was before.

vskid · Post by **vskid** » Sat Dec 13, 2008 8:40 pm

tysonDS wrote:4 x D Cells is quite possible though, that would give 80,200 capacity as opposed to the 5780 from 2 AA.

Yep, except those numbers will be cut in half when you wire them to make 3v.

I tested my GBA playing Pokemon Gold, and it used about 130mA @~2.7v. Might be a bit more with a GBA game or flash cart.

tysonDS · Post by **tysonDS** » Sun Dec 14, 2008 2:20 am

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Bibin · Post by **Bibin** » Sun Dec 14, 2008 9:44 am

I've got an EZ-Flash II "PowerStar'' so that may be why I do not suffer the battery issue.

tysonDS · Post by **tysonDS** » Sun Dec 14, 2008 5:01 pm

Bibin wrote:I've got an EZ-Flash II "PowerStar'' so that may be why I do not suffer the battery issue.

Yeah, they're great! Unfortunately the store I bought mine from only had the EZF3. (This was back when I was worried about buying things off the net lol).

tysonDS · Post by **tysonDS** » Sun Dec 14, 2008 6:26 pm

I found some more realistic figures on Wiki of Disposable Battery capacities:

Battery type Typical capacity in mAh
AA 2,400
C 7,800
D 12,000