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RBMann's Avatar
 
Join Date: Sep 2001
Location: Kenmore, WA
Posts: 3,829
Battery sale

It use to be if you bought a WesCo AGM battery for your S and peeled back their label one of these was underneath, Panasonic LC-X1220P.

https://www.portablepower.com/product/panasonic-lc-x1220p/

I have used three of these and each one lasted over five years. I just got my S running after 1.5 years of rest and it started right up. I had charged the battery about every six months. I didn't think of replacing it until I checked my records and it is 7+ years old. Still shows 12.4 V. but found the sale and decided to get a new one. $74.75 shipped to my door.
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RBMann- The road is his workshop, and his trips are opportunities to do much needed repairs. -Bill S.
* 2000 S, color-Salmon 100K+ * '09 F650GS twin
* '83 GPZ 550-gone to a newbie * '75 CB400F-retired to AZ.
Old 04-22-2018, 10:05 AM
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sɹǝʇndɯoɔ sǝʇɐɥ
 
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Join Date: Oct 2010
Location: NC
Posts: 445
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Yes. I've had a few. The Panasonic LC series is excellent.
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Mike
'83 R100RS
'07 R1200S
'07 DRZ-400s
Old 04-22-2018, 02:44 PM
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The S starts briskly with the new battery. 13.3V. vs 12.4V. for the old one, I guess it was time to replace.
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RBMann- The road is his workshop, and his trips are opportunities to do much needed repairs. -Bill S.
* 2000 S, color-Salmon 100K+ * '09 F650GS twin
* '83 GPZ 550-gone to a newbie * '75 CB400F-retired to AZ.
Old 04-23-2018, 10:03 PM
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As stated on the website, "Panasonic LC-X1220P (12 Volt/20 Amp Hour) Long Life, Sealed Lead Acid Battery Nut-Bolt Terminal VRLA (AGM) Technology" is an AGM (Absorptive Glass Matt) battery. AGM technology offers some distinct advantages over the older "flooded plate" batteries for motorcycles, but has a different charging rate than the R11S bikes were built for.

Knowledge - AGM Battery Info - VDC Electronics

The OEM voltage regulator on the R11S (mine is a '99 R1100S) provides about 13.5 to 13.8V to the system for charging. Most regular battery chargers and battery "maintainers" also charge at this voltage. This will only charge an AGM to about 80%, which will cause an early battery failure.

AGM batteries need 14.5 to 14.7V to fully charge. This may not sound like much but the R11S really knows the difference (the ECU is sensitive to low voltage) and the AGM battery (and any battery) will last much longer with a 100% charge.

BatteryMINDer (and other manufacturers) make chargers specificaly rated for AGM batteries. Check your charger, if it doesn't specifically state "For AGM", it's not.

BatteryMINDer 12V Maintainer for Sealed AGM Lead-Acid Batteries

The voltage regulator on the R11S can be changed for an AGM rated 14.5V regulator that also comes with a new set of brushes.

BOSCH - Internal Voltage Regulator BMW K & R Oilhead ; 12 31 1 739 365 / EnDuraLast

The voltage regulator in the R11S CAN be replaced WITHOUT removing the ABS unit or alternator, as called for by the repair manuals.
Old 04-25-2018, 05:30 AM
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Location: Kenmore, WA
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Lowndes-

Interesting info. My high mileage 2000 S shows 14.1V. at the battery when running. Since I have averaged 5+ years with the Panasonic I don’t see a need to upgrade the regulator until it fails but thanks for the link.
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RBMann- The road is his workshop, and his trips are opportunities to do much needed repairs. -Bill S.
* 2000 S, color-Salmon 100K+ * '09 F650GS twin
* '83 GPZ 550-gone to a newbie * '75 CB400F-retired to AZ.
Old 04-25-2018, 06:33 PM
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