Is this feasible?

Alchemist · Post by **Alchemist** » Sat Apr 30, 2005 7:10 am

Sure is

SgtBowhack · Post by **SgtBowhack** » Sat Apr 30, 2005 7:12 am

Yeah, I suppose so. In any case, big batteries are bad

nos_slived · Post by **nos_slived** » Sat Apr 30, 2005 1:57 pm

LOL. Go with energizer alkaline #521. That thing is huge. Although I guess you could just use a car 12v for size. Sometimes bigger isn't better.

Sweebez · Post by **Sweebez** » Sat Apr 30, 2005 3:31 pm

That wasnt the smartest move there...

Thought it wouldn't matter, because the 'case' is a padded briefcase; flip the top open like a laptop, and theres the screen. I figured any more additional weight wouldnt matter after that of a padded briefcase.

At any rate, The plane's going to Scottland, and thats about 14 hours.
Since the failed NPFA70 battery idea, it was the best I could come up with that wasn't hooked parallel.

---
EDIT: Actually, after looking at the Energizer 521, i was tempted for a sec...

tom61 · Post by **tom61** » Sat Apr 30, 2005 4:04 pm

gannon wrote:
tom61 wrote:
10Ah is only the same as about 4 or 5 rechargeable AAs...
At 1.5Volts, yes. If wired in parrallel, the Amperage and available mAh is added together. However, in series, the the Amp/mAh stays the same as one battery.
What are you talking about?
He's talking about a 4 or 5 cell parallel 1.2V battery pack.

Sorry forgot that NiMH batteries being 1.2Volts. What I meant is 5 rechargable 2300mAh cells wired in series, will provide only 2300mAh at 6V. 5 wired in parrallel would give you 11.5Ah at 1.2 Volts.

*o* · Post by ***o*** » Sat Apr 30, 2005 4:12 pm

so 5 $1 batteries have more power than that huge lead acid battery

SgtBowhack · Post by **SgtBowhack** » Sat Apr 30, 2005 7:04 pm

No, 25. You can't just take voltage or amp-hours to measure battery power. Both are important parts of the equation. If you hook them up parallel, you get the same Ah rating, but at 1/5 the voltage. If you hook them up serial, you get the same voltage but at 1/5 the battery life. Therefore, you need to hook them up in a 5x5 grid to get the same as that battery.
But as I said, hooking up batteries in parallel is dangerous, which is why it is rarely done in consumer electronics. Chances of battery exploding and stuff are high.