Why Did This Battery Recharge?

[W. eWatson]

My son's truck battery ran down, and I tried starting the truck by jumping
my 600W powerpack across it. I heard the click-click of the engine trying to
turn over, but no luck, so I decided to leave the pack attached for 15-20
min to charge the truck battery. As I went back to the house, I thought
how's that going to do any better. Anyway, I waited 15 minutes, and it
started right up. Why?
--
W. eWatson

(121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
Obz Site: 39° 15' 7" N, 121° 2' 32" W, 2700 feet

Web Page: <www.speckledwithstars.net/>

 

[Andrew Holme]

My son's truck battery ran down, and I tried starting the truck by jumping
my 600W powerpack across it. I heard the click-click of the engine trying
to turn over, but no luck, so I decided to leave the pack attached for
15-20 min to charge the truck battery. As I went back to the house, I
thought how's that going to do any better. Anyway, I waited 15 minutes,
and it started right up. Why?
--
W. eWatson

(121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
Obz Site: 39° 15' 7" N, 121° 2' 32" W, 2700 feet

Web Page: <www.speckledwithstars.net/>

Even a partially charged battery can supply a higher peak current than your
power pack.

 

[neon]

Simple not enough juice. When you jump a battery leave the the charging car idleing. Otherwise there can be two stuck cars. Not all enigne have the same battery amps/hour and if weak it cannot by itself star the car it needs help from the other car battery. So wait a very short time and try to start the car.

 

[Bob]

Even a partially charged battery can supply a higher peak current than your
power pack.

and when the powerpack was first connected the exhausted battery
would have been drawing lots of current from it, when the
OP tried to start the enginethe first time the truck battery
was probably drawing current from the powerpack, putting a greater
load on it and pulling the voltage down.

Bob

 

[krw]

I just start mine of my solar array battery pack. 40 lead acids have no trouble starting a car.

Lead acid what? Forty lead acid cells could be 80V. I don't see a
way to get 12V though (six strings of six leaves four extra). BTW,
one lead acid battery has no trouble starting a car. ;-)

Starting a car at room temperature is easy. At -20F you need a
little better battery.

 

[krw]

Forty of standard car batteries (if you can call 100Ah standard), in parallel. This is 12 volts.

You *are* a moron. One standard car battery is clearly enough.

Unfortunately (I like the cold), we don't get those temps in the UK.

Like I said, you *ARE* a moron. You're in the Donkey's class.

 

[W. eWatson]

Lead acid what? Forty lead acid cells could be 80V. I don't see a
way to get 12V though (six strings of six leaves four extra). BTW,
one lead acid battery has no trouble starting a car. ;-)

Starting a car at room temperature is easy. At -20F you need a
little better battery.

Interesting diversion. How does this answer the question?

--
W. eWatson

(121.015 Deg. W, 39.262 Deg. N) GMT-8 hr std. time)
Obz Site: 39° 15' 7" N, 121° 2' 32" W, 2700 feet

Web Page: <www.speckledwithstars.net/>

 

[krw]

Interesting diversion. How does this answer the question?

I thought the moron was using 5AH SLACs or some such. Who knew the
troll was having trouble starting cars with forty automotive
batteries.

 

[ian field]

Interesting diversion. How does this answer the question?

I thought the moron was using 5AH SLACs or some such. Who knew the
troll was having trouble starting cars with forty automotive
batteries.

Phucker has boasted he gets all the batteries for his 12V solar powered
house lighting for free by scrounging end of life car batteries.