Anti-Gravity Battery

JSharpPhoto · Post by **JSharpPhoto** » Fri Sep 13, 2013 10:36 pm

I'm looking to replace my battery with something a bit smaller. I've been advised to look at the anti-gravity batteries. They're very small, and don't get damaged if they're completely drained, unlike other batteries.

There's the 4 cell, and the 8 cell.

The 4 cell says "Capable of every day use in bikes up to 250cc"

The 8 cell says "Capable of every day use in bikes up to 550cc"

My bike is a kickstart only 1967 CB77. Do you guys think the 4 cell would handle my super hawk? or do I need to go up to the 8 cell to be safe?

http://antigravitybatteries.com/small-case-batteries/

JSharpPhoto · Post by **JSharpPhoto** » Fri Sep 13, 2013 11:39 pm

Or should I just go with an AGM battery? I can lay that on its side, right?

http://www.impactbattery.com/mb9u-motob ... yb7-a.html

brewsky · Post by **brewsky** » Sat Sep 14, 2013 6:41 am

no experience, but a quote from their website......

" (Please note if you use older classic bikes from mid 1980s and earlier you should update the charging sytems to a modern voltage regulator)"

I have read that they don't like to be overcharged, and they contain a flammable, PRESSURIZED electrolyte

One of the electrical guru's will hopefully chime in...

Superchicken · Post by **Superchicken** » Sat Sep 14, 2013 9:25 am

JS, the AGM is very close to the stock battery, but has more cranking amps and no acid overflow tube. I have not run one on my super hawk, tho the one on my yama vision lasted 9 years! Fully charged they are 12.8 volts, it only needs to be charged if it gets down to 12.6 volts

JSharpPhoto · Post by **JSharpPhoto** » Sat Sep 14, 2013 7:03 pm

Can someone confirm that a AGM can be mounted laying on its side?

Superchicken · Post by **Superchicken** » Sat Sep 14, 2013 10:51 pm

yes they can be any position

JSharpPhoto · Post by **JSharpPhoto** » Sat Sep 14, 2013 11:54 pm

Well that solves that. I can mount it laying down inside my seat hump.