Lightweight Batteries

njfl

X-H2
I saw the thread on the 1 Gallon fuel cell begin to get hijacked so I wanted to start this here. I've done a little research on batteries, weight, and power.

My personal feeling is that the Deka (sealed) and Odyssey batteries are superior to the Walmart and vented auto store ones, but thi spast weekend I saw Malone's boat running total loss awith a generic-looking small motorcycle battery. He ran without problems for probably at least an hour of total riding time.

I have been running the Odyssey PC310 (6 pounds) with an Advent ignition without problems, although it is a little slower cranking than the standard 13lb batteries.

I recently learned that Deka makes the ETX9 sealed battery. It's 9 pounds, but has a little more power and is a little less expensive than Odyssey. Chuckie at Team Scream has recently converted me from Odyssey to Deka and I do believe that Deka is a more reliable battery, but it comes at the expense of a few pounds.

Here's a small chart showing what Deka and Odyssey offer in our range of needs (weight in pounds):

HTML:
Brand	Model	CCA	AH	Weight	L(")	W(")	H(")
Deka	ETX9	120	9	7	5.9	3.4	4.2
Deka	ETX12	180	12	9	5.9	3.4	5.2
Deka	ETX16	275	16	17	6.9	4	6.5

Odyssey	PC310	100	8	6	5.4	3.4	4
Odyssey	PC625	265	16	15	6.7	3.9	6.9
 
A yuasa ytz7s weighs 4 1/2 lbs. and has 130 cold cranking amps. an extreme xtz7s weighs 3lbs. not sure the exact cca but it does almost as well as the yuasa in a sportbike.
 

njfl

X-H2
yuasa has full specs online: http://www.yuasabatteries.com
That ytz7s has about 1/3 of the capacity of a yb16-cl. (1/3 weight,1/3 capacity..makes sense)

Yes, I think that we have to experiment some more over time and across the various ignition combos with the different batteries to determine which are the most robust and which are the best for the various types of riding/ski setups. I'm thinking that the 1/3 capacity is going to limit the riding time with TL.
 
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