MK 12 volt battery question

[ebarker]

I think these people will ship to Israel.

http://www.economybatteries.com

http://www.economybatteries.com/qsea...eld.y=0&bhcp=1

Order the ES17-12, not the ES17-12AP

Ed

[pludodog]

Originally Posted by ebarker

I think these people will ship to Israel.

http://www.economybatteries.com

http://www.economybatteries.com/qsea...eld.y=0&bhcp=1

Order the ES17-12, not the ES17-12AP

Ed

That's a really good price. I've been between $40 and $50 from most other battery sites.

[Mike Hendricks]

From MK's website ..

http://www.mkbattery.com/images/ES17-12.pdf

Looks like the 720A discharge wins.

[Al Skierkiewicz]

Thanks Bud for overlaying the graphs. It shows pretty conclusively that the differences between the batteries lies mostly in the method used to test. Let's not get hung up on the max current spec. The real difference between the batteries is the internal resistance, 11mohm for the old battery and 10mohm for the new. Hang a dead short on the output terminals (please don't do this) and Ohm's Law tells you...12/.011 vs. 12/.010=1099 vs. 1200. Throw in some safety margin so you don't cause the battery to explode and you get down to the 720 amps max discharge for a new, fully charged battery, no matter the manufacturer.

[AJ R]

<R53> The only legal main source of electrical energy on the ROBOT during the competition is the
12VDC non-spillable lead acid battery provided in the 2007 Kit Of Parts. That 12V battery is
the MK Battery, ES17-12. Additional batteries may be purchased through a local MK
Battery supplier. Teams may use other equivalent 12V batteries during development,
testing and practice matches. However, during the qualifier and elimination matches, only
the MK Battery, ES17-12 can be used (this means NO pre-2007 batteries can be used
during qualification and elimination matches at any official 2007 FIRST competition).

The batteries from past years can be used, but not in qualifying or elimination rounds.

[jparkteach]

Forgive me if this have been mentioned already but could I make a suggestion for all you veteran teams? Find a rookie team nearby and offer them two of your old Exide batteries. I'm sure they'll all appreciate having the extra batteries for testing and practice. Go to usfirst.org to find the rookie teams nearest you!

[bWard]

is this the right battery



http://store.aiconsol.com/es17-12-mk-battery.html

[Al Skierkiewicz]

Originally Posted by bWard

is this the right battery



http://store.aiconsol.com/es17-12-mk-battery.html

Yes. Be careful where you buy so that you don't have to wait until May to get delivery.

[Fred Sayre]

Originally Posted by jparkteach

Forgive me if this have been mentioned already but could I make a suggestion for all you veteran teams? Find a rookie team nearby and offer them two of your old Exide batteries. I'm sure they'll all appreciate having the extra batteries for testing and practice. Go to usfirst.org to find the rookie teams nearest you!

Great idea! This is a cool way for a veteran team to painlessly help rookie teams out.

[Jeremytice]

Here's a PDF that I found on the battery.

http://www.mkbattery.com/images/AGM_S_v1_UK.pdf

[Seki]

Thanks guys for helping.
I needed to know quick so we oculd get a few more ^_^

[eugenebrooks]

Originally Posted by ebarker

I think these people will ship to Israel.

http://www.economybatteries.com

http://www.economybatteries.com/qsea...eld.y=0&bhcp=1

Order the ES17-12, not the ES17-12AP

Ed

We ordered, and received, several extra ES17-12 batteries
from this source. To cause even more confusion on the battery
situation, the kit batteries were grey and these batteries
are black. The model number on the kit batteries is ES17-12,
with the printed (on the battery) amp hour rating being 18 ah
at the 20 hour rate. The model number on the batteries we got
from this source is also ES17-12, with the printed amp hour rating
being 17 ah at the 20 hour rate. This is consistent with the amp
hour rating in the specification chart for the ES17-12AP battery,
but the battery we ordered, and the model number printed on
the battery we received, is ES17-12.

All I care about at this point is passing inspection!

Eugene

[ebarker]

For anyone concerned about disposing old worn out FRC batteries please read the first notice in TEAM UPDATE #1 for more information about disposal.

Ed

[Dave K.]

Originally Posted by eugenebrooks

We ordered, and received, several extra ES17-12 batteries
from this source. To cause even more confusion on the battery
situation, the kit batteries were grey and these batteries
are black. The model number on the kit batteries is ES17-12,
with the printed (on the battery) amp hour rating being 18 ah
at the 20 hour rate. The model number on the batteries we got
from this source is also ES17-12, with the printed amp hour rating
being 17 ah at the 20 hour rate. This is consistent with the amp
hour rating in the specification chart for the ES17-12AP battery,
but the battery we ordered, and the model number printed on
the battery we received, is ES17-12.

All I care about at this point is passing inspection!

Eugene

I didn't find your lower cost source before ordering from here: http://www.batteriesasap.com/659.html. Arrived within 2 days, shipped from Illinois.

The batteries are the same grey color included in the kit and have a date code of 060928 stamped into the top, which I would guess means they were manufactured Sept. 28th, 2006.

They arrived with terminal voltages of 12.78 and 12.76 volts and didn't take much of an equalizing charge.

[Al Skierkiewicz]

Originally Posted by eugenebrooks

We ordered, and received, several extra ES17-12 batteries
from this source. To cause even more confusion on the battery
situation, the kit batteries were grey and these batteries
are black. The model number on the kit batteries is ES17-12,
with the printed (on the battery) amp hour rating being 18 ah
at the 20 hour rate. The model number on the batteries we got
from this source is also ES17-12, with the printed amp hour rating
being 17 ah at the 20 hour rate. This is consistent with the amp
hour rating in the specification chart for the ES17-12AP battery,
but the battery we ordered, and the model number printed on
the battery we received, is ES17-12.

All I care about at this point is passing inspection!

Eugene

Gene,
Inspectors ran into this problem last year if you remember. The various suppliers make batteries stamped with the same part # but as I remember the black ones were not allowed for competition. It would seem that First needs to address this issue NOW.