Battery charging - BMW R1200GS Forum : R1200 GS Forums
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post #1 of 16 (permalink) Old 08-Aug-2019, 11:09 AM (673) Thread Starter
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Battery charging

Iíve got a 2018 GSA, want to add pigtail to battery, it says only charge battery this way when disconnected from motorcycle.

Said it will damage electronics

Any advice on how to get this so I can put bike on trickle charger?

Thanks
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post #2 of 16 (permalink) Old 08-Aug-2019, 01:01 PM (751)
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I don't know how a one amp trickle charger connected directly to the battery can cause damage to the electronics.
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Rick
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post #3 of 16 (permalink) Old 08-Aug-2019, 01:24 PM (766)
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I periodically trickle charge when bike is garaged for trips/vacation, and never had an issue. 2015 with original battery 84k miles

Kam
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post #4 of 16 (permalink) Old 08-Aug-2019, 01:26 PM (768)
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I have used one of these, wired directly to my battery, on all three of my BMW's, and never ever had any electrical or battery issues.

https://www.amazon.com/Battery-Tende...-1-spons&psc=1
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post #5 of 16 (permalink) Old 08-Aug-2019, 03:03 PM (836)
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Said what?

I've used an Optimate on my 2017 GSA since new. It is garaged for several months at a time. It is connected to an SAE pigtail directly off the battery. It is microprocessor controlled and checks the battery voltage every half hour or so by applying a small load, for accuracy. If the battery voltage is within range it does nothing. If the battery voltage has slipped it applies a low amperage charge until target voltage is met.

The Optimate costs more than the Battery Tender but connected to a $26k bike, I went with the premium. That said I've never heard of Battery Tender brand causing problems and believe me, if one of these units caught fire or blew the electronics on a BMW bike, the event would be broadcast from the tallest tree.
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post #6 of 16 (permalink) Old 08-Aug-2019, 05:52 PM (953)
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Hi

I have 3 BMWs all new each one has a trickle charger on them they a directly wired to the battery. Use any trickle charger
The other option is to buy that Optimate

https://www.revzilla.com/motorcycle/...saAkAzEALw_wcB

Last option buy the BMW charger


Quote:
Originally Posted by Xlntcfp View Post
I’ve got a 2018 GSA, want to add pigtail to battery, it says only charge battery this way when disconnected from motorcycle.

Said it will damage electronics

Any advice on how to get this so I can put bike on trickle charger?

Thanks

Ian

Management is doing things right; leadership is doing the right things.
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post #7 of 16 (permalink) Old 08-Aug-2019, 06:23 PM (974)
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Optimate

Thats a 2 thumbs up for Optimate smart battery chargers. They are the gold standard for battery maintenance, do not buy or use a "trickle charger", use some type of "smart charger", it will monitor, charge, de-sulfate as required. You will never buy another battery !
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post #8 of 16 (permalink) Old 08-Aug-2019, 07:57 PM (040)
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consideration

I would expect to properly recharge a battery we would use a "battery charger" and not a " battery tender" each having a distinct and dedicated purpose. The first is to bring a "dead" battery back into operating condition and uses 3-6-12-25 amps to boost or jump the battery up over a short period of time. The maintainers are to keep a charged battery in optimum range, preventing unnecessary wear on the bikes own recharge system. Some newer batteries actually call for lower amps and longer charge cycles to prevent damaging the cells, Gas Mat types, and some of the newer Lithium types can be especially sensitive to large amp pushes. The presumption above is that they recommend disconnecting the battery from the bike when reviving a dead battery and assuming that the battery can take a large amp boost. The newer bikes have lots of low voltage sensors and light now and may be prone to over current damage. That just my hat in the ring thing.
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post #9 of 16 (permalink) Old 08-Aug-2019, 08:31 PM (063)
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Stick to an Optimate charger

Quote:
Originally Posted by Xlntcfp View Post
Iíve got a 2018 GSA, want to add pigtail to battery, it says only charge battery this way when disconnected from motorcycle.

Said it will damage electronics

Any advice on how to get this so I can put bike on trickle charger?

Thanks
I have a 2015 GS with the original battery. I wrote this a couple of weeks ago. If it's not running its plugged to the optimate via the powerlet plug.
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post #10 of 16 (permalink) Old 09-Aug-2019, 02:36 AM (317)
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I asked my dealer's mechanic this very question. He said it is not an issue.
Had my 2018 hooked up to an Optimate 24/7 in my unheated shed all last winter. No Problems

Riding "Sir Falls Downalot"

A wish is a desire without an attempt.
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