New Yuasa battery sides bulging - BMW Luxury Touring Community
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post #1 of 24 Old Dec 14th, 2019, 4:16 pm Thread Starter
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New Yuasa battery sides bulging

Bought a Yuasa AGM battery, direct part # replacement per Yuasa for 2005 RT, filled with electrolyte per the instructions. Tested, immediately 12.5 volts. Placed battery on 1.5amp 12v charger. Multimeter measured an output of 13.2 volts during charging. After about 1.5 hours, checked progress. Charger still showed “charging” light, sides of battery slightly bulged out. Removed from charger, realized I wasted $ on new battery which appears to be ruined. Where did I go wrong here?

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post #2 of 24 Old Dec 14th, 2019, 4:18 pm Thread Starter
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Battery is a Yuasa YT19BL-BS

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post #3 of 24 Old Dec 14th, 2019, 4:35 pm Thread Starter
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Incidentally, the case of the battery was not at all warm to the touch at any point during this process. When I say “bulging”, it’s not perfectly straight on the sides, but it is on the front. To be accurate, I did not inspect this prior to charging, theoretically possible that the battery case is simply not square. Seems highly unlikely. I suppose a pic is in order here.
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post #4 of 24 Old Dec 14th, 2019, 5:13 pm Thread Starter
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Pic of bulging, charging and use abandoned
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post #5 of 24 Old Dec 14th, 2019, 9:39 pm
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Re: New Yuasa battery sides bulging

What kind of charger? Also, that battery is maintenance free and sealed. You shouldn't add electrolyte to it if the literature is right online.

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post #6 of 24 Old Dec 14th, 2019, 9:55 pm
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Re: New Yuasa battery sides bulging

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Originally Posted by Ponch View Post
What kind of charger? Also, that battery is maintenance free and sealed. You shouldn't add electrolyte to it if the literature is right online.
See here for correct information on BS batteries.

https://www.yuasabatteries.com/resou...n-agm-battery/

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post #7 of 24 Old Dec 14th, 2019, 10:02 pm
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Re: New Yuasa battery sides bulging

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Originally Posted by kioolt View Post
See here for correct information on BS batteries.

https://www.yuasabatteries.com/resou...n-agm-battery/
Ok, Then maybe he cooked it with the charger?

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post #8 of 24 Old Dec 14th, 2019, 11:02 pm Thread Starter
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Re: New Yuasa battery sides bulging

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What kind of charger? Also, that battery is maintenance free and sealed. You shouldn't add electrolyte to it if the literature is right online.
Schumaker 12v, 1.5amp battery charger
It came shipped with separate electrolyte. It was not a factory activated battery.
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post #9 of 24 Old Dec 14th, 2019, 11:07 pm
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Re: New Yuasa battery sides bulging

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Schumaker 12v, 1.5amp battery charger
It came shipped with separate electrolyte. It was not a factory activated battery.
I use a battery tender. Does that charger have some intelligence or does it just keep charging until you disconnect it/turn it off?

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post #10 of 24 Old Dec 14th, 2019, 11:16 pm Thread Starter
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Re: New Yuasa battery sides bulging

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Ok, Then maybe he cooked it with the charger?
Hoping that's not the case, but I suppose it's possible. Battery is a 17.7 aH. Always heard a battery can be charged with 1/10 it's aH rating in amps. Really not sure what happened exactly.
Performed initial fill per the included instructions. Let electrolyte package drain into battery for about 30 min. Really it took probably 10 min to drain, let it sit for a bit. Charger was only connected to battery after initial fill for approx. 3 hrs. Resting voltage reading upon charger removal was 12.9v. I do have one suspicion: although the instructions in the package did not specify to do this, I've now seen a video which advises after initial fill, to let the battery sit with plate cover off, for 30min to a few hours, to ensure any bubbling or trapped gasses can escape, before tightly fitting the cover permanently. Wondering if that may be it?

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post #11 of 24 Old Dec 14th, 2019, 11:19 pm Thread Starter
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Re: New Yuasa battery sides bulging

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Originally Posted by Ponch View Post
I use a battery tender. Does that charger have some intelligence or does it just keep charging until you disconnect it/turn it off?
It does. Incidentally, I ordered a Battery Tender today, in case this charger is the culprit. If not, I'll have one for each bike, not a big deal there. Once it reaches full charge, the charger switches to what is labeled as "float mode", measured as 13.1v with multimeter.

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post #12 of 24 Old Dec 15th, 2019, 12:50 am
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Re: New Yuasa battery sides bulging

I use the same type batteries, the instructions for a 30 minute rest period are there, I think you missed this step. Also your old charger does not sound like a smart charger needed for safe charging. If you skipped the rest time where the acid penetrates the plates, not good. These batteries are my favorite because you know they are fresh. You fill them yourself and pre charge them which many shops skip, thus losing full capacity.

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post #13 of 24 Old Dec 15th, 2019, 11:45 am
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Re: New Yuasa battery sides bulging

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Originally Posted by BB 1200RT View Post
Battery is a Yuasa YT19BL-BS
Regardless of what battery it is, if it's bulging, it needs to be replaced. Imagine the pressure it takes to bulge out... They CAN fracture, or even explode if they are hot. It's hard to identify the cause. Bad battery? Charging method? (likely the latter).

Regardless of the cause, the battery is clearly damaged, and unsafe. I would get it out of the bike and replace with a new one.
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post #14 of 24 Old Dec 15th, 2019, 12:41 pm
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Re: New Yuasa battery sides bulging

Don't take a chance with that battery. I had the battery on my Aprilia freeze and leak. It was a total disaster, since I didn't realize the battery leaked until much later. The rear swing arm never looked decent after that.
I also prefer to fill and charge my own batteries. I never do the initial charge in the bike, in case there's a leak. Do it in a well ventilated area at room temp.
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post #15 of 24 Old Dec 15th, 2019, 12:46 pm
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Re: New Yuasa battery sides bulging

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Hoping that's not the case, but I suppose it's possible. Battery is a 17.7 aH. Always heard a battery can be charged with 1/10 it's aH rating in amps. Really not sure what happened exactly.
Performed initial fill per the included instructions. Let electrolyte package drain into battery for about 30 min. Really it took probably 10 min to drain, let it sit for a bit. Charger was only connected to battery after initial fill for approx. 3 hrs. Resting voltage reading upon charger removal was 12.9v. I do have one suspicion: although the instructions in the package did not specify to do this, I've now seen a video which advises after initial fill, to let the battery sit with plate cover off, for 30min to a few hours, to ensure any bubbling or trapped gasses can escape, before tightly fitting the cover permanently. Wondering if that may be it?
Could be. It expanded from gas expansion. Maybe letting it sit before capping is the way to go. Thing is, don't those things have some sort of venting?

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post #16 of 24 Old Dec 15th, 2019, 3:51 pm
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Re: New Yuasa battery sides bulging

Silly question but I'll ask anyway: when you did the initial charge were the battery elements open? or covered?

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post #17 of 24 Old Dec 16th, 2019, 1:43 pm
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Re: New Yuasa battery sides bulging

Nothing you say you've done seems suspect. I can't tell from your photo what it's showing. Your charger almost certainly has maintenance mode, so the likelihood of overcharging in three hours is very slim, except for battery defect. I did exact same thing w/ mine (same battery for KLT) and I think it charged overnight before green light.

Bulging of case is a different issue altogether. "Sealed" battery still has venting, so battery swelling w/in 3 hours, w/ no excessive heating is pointing to defective battery in my opinion.
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post #18 of 24 Old Dec 17th, 2019, 2:21 pm
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Re: New Yuasa battery sides bulging

dj, did you skip the part in the instructions that says let the battery sit for half an hour before top off charge?

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post #19 of 24 Old Dec 18th, 2019, 8:20 pm
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Re: New Yuasa battery sides bulging

I think sealing the battery before allowing it to outgas for 30 minutes is what caused the case to swell. I'd check to see that the case hasn't been damaged by the swelling. If it's good, the battery will work fine. If it still fits in the bike I'd use it without reservation.
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post #20 of 24 Old Dec 21st, 2019, 4:57 pm Thread Starter
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Re: New Yuasa battery sides bulging

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Originally Posted by minirips2 View Post
Don't take a chance with that battery. I had the battery on my Aprilia freeze and leak. It was a total disaster, since I didn't realize the battery leaked until much later. The rear swing arm never looked decent after that.
I also prefer to fill and charge my own batteries. I never do the initial charge in the bike, in case there's a leak. Do it in a well ventilated area at room temp.
Leak or explosion, either one sounds bad. They're actually going to send out a replacement. Can't beat that I guess.
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post #21 of 24 Old Dec 21st, 2019, 5:02 pm Thread Starter
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Re: New Yuasa battery sides bulging

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dj, did you skip the part in the instructions that says let the battery sit for half an hour before top off charge?
Oddly enough, in the written instructions that came with the battery, it didn't mention that. However, Yuasa's website certainly does. But I sorta skipped that. I let the liquid drain into the battery for, I think 30-45 min, then immediately capped the battery and juiced it. Oooooops. Incidentally, the battery makes very slight noises even while sitting, not on charger and not under load. I would certainly think that's not normal, but I confess, I've never decided to listen to a battery prior to this one. It hasn't exploded yet, but I haven't used it either.

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post #22 of 24 Old Dec 21st, 2019, 5:04 pm Thread Starter
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Re: New Yuasa battery sides bulging

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Nothing you say you've done seems suspect. I can't tell from your photo what it's showing. Your charger almost certainly has maintenance mode, so the likelihood of overcharging in three hours is very slim, except for battery defect. I did exact same thing w/ mine (same battery for KLT) and I think it charged overnight before green light.

Bulging of case is a different issue altogether. "Sealed" battery still has venting, so battery swelling w/in 3 hours, w/ no excessive heating is pointing to defective battery in my opinion.
I sent description of the incident and pics to the amazon seller, and they're sending out a replacement. Can't beat that. I'll make sure and let it sit extra long next time, after liquid, and before capping, just in case though.

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post #23 of 24 Old Dec 21st, 2019, 5:06 pm Thread Starter
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Re: New Yuasa battery sides bulging

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Originally Posted by zippy_gg View Post
Silly question but I'll ask anyway: when you did the initial charge were the battery elements open? or covered?
Not silly at all, to me anyway. I had the caps on during initial charge. 1) added liquid, let drain into battery about 30-45 min. Added caps, then charged. Won't do it that way next time.

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post #24 of 24 Old Dec 21st, 2019, 5:08 pm Thread Starter
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Re: New Yuasa battery sides bulging

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Could be. It expanded from gas expansion. Maybe letting it sit before capping is the way to go. Thing is, don't those things have some sort of venting?
From what I can tell, there's really no venting, but supposedly the design of the cap assembly is such that it would allow escaping gasses if they built up enough to almost explode the battery. I'm not quite brave enough to test that. Although it appears I almost did, by accident lol.

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