AGM Battery tips

Nibbio Posts : 634 Join date : 2013-12-23

Replacing the factory battery with an AGM. Does it need any special treatment? There is an AGM setting on my Sears battery charger and it is buzzing away in my garage prior to installation.

GRiSO Capo Posts : 735 Join date : 2014-04-23 Age : 77

I thought the original Yuasa YTX20-BS is already an AGM type battery. Use the same settings you used for the original?

Don Abbondio Posts : 6086 Join date : 2014-03-13 Age : 69

In essence and AGM is still a Lead/Acid battery. Just different internals, that's all. Gel are the same thing too. What you do for a Lead/Acid, do for your AGM or Gel.

I think the original was a sealed Lead/Acid... but I might be wrong.

GRiSO Capo Posts : 735 Join date : 2014-04-23 Age : 77

The first three letters YTX defines it as an AGM.

Don Abbondio Posts : 6086 Join date : 2014-03-13 Age : 69

I sit corrected

GRiSO Capo Posts : 826 Join date : 2014-10-07 Age : 70

Ones with 4 terminals are the easiest to fit and swap between bikes.

Grignapoco Posts : 189 Join date : 2016-09-09

With AGM you need to add the acid and wait a minimum of 2 hours but best 12 hours to allow the acid to soak into the glass mat material. Failure to do this will result in a very short battery life.
Then give it a gentle charge until it reaches full capacity and finally fit to your bike.
If you don't use your bike regularly then every 14 days give it a gentle top-up charge.

Guest

Yep, and don't get confused with what is sealed etc.

YTZ range are also AGM but FA (no, not fucked, it means Factory Activated). Sealed at the factory and charged before shipping.
These are able to be mounted on their side or tilted etc.

YTX range are only sealed once filled and charged by you, these are prone to leaking if not kept vertical, as many a Triumph Speed Triple owner has found out.
The slight angled mounting on a GRiSO is not an issue.

Grignapoco Posts : 135 Join date : 2016-11-26 Age : 56

As reference point, the factory mounted battery is a "High Performance" AGM, Yuasa YTX20CH-BS.

Yuasa's spec page for this battery: [You must be registered and logged in to see this link.]

At the bottom of this page, there is a link to Yuasa's "Technical Manual", it has some info, that may be usefull.

Nibbio Posts : 634 Join date : 2013-12-23

ghezzi wrote:: Yep, and don't get confused with what is sealed etc.
YTZ range are also AGM but FA (no, not fucked, it means Factory Activated). Sealed at the factory and charged before shipping.
These are able to be mounted on their side or tilted etc.
YTX range are only sealed once filled and charged by you, these are prone to leaking if not kept vertical, as many a Triumph Speed Triple owner has found out.
The slight angled mounting on a GRiSO is not an issue.

My replacement is FA. It was at 12.4 V when it arrived so I put it on AGM 2A charge setting. It's in the bike now showing 13.7 V. I think the AGM setting is to keep the charger in the right range -- not too much or too little.

Thanks to all for the AGM ABCs DW

Nibbio Posts : 634 Join date : 2013-12-23

avgpetro wrote:: As reference point, the factory mounted battery is a "High Performance" AGM, Yuasa YTX20CH-BS.

Yuasa's spec page for this battery: [You must be registered and logged in to see this link.]

At the bottom of this page, there is a link to Yuasa's "Technical Manual", it has some info, that may be usefull.

Indeed:

"When considering upgrading to an AGM battery
that was not original equipment on a vehicle, check
to make sure the charging system has a regulated
output between 14.0 and 14.8 volts. In general, older
vehicles have a charging rate that produces lower voltages
and a Conventional battery will be the only battery option
for these vehicles."

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