r/batteries

Hey Folks

Has anyone experienced this

I had it twice

First when the brand new battery turned on and I lost nbn

Restarted everything

Hard reset nbn box

Nothing worked

Suddenly after few hours nbn is normal

Happened again when sparky restarted the battery for checks

Lost nbn again

Called support and they say everything good at their end

Makes no sense at all

Really appreciate help

Hello,
I have recently replaced the battery on my ASUS VivoBook S510U with one bought on Amazon for 35€ roughly.
I’ve done that because the original one had less duration and sometimes it was shutting down randomly.

Installed the new one, but it shows always (even when unplugged) in charge (even with the side led on) and doesn’t always charge. When it decides to charge it does but sometimes it don’t.

Fun fact. I’ve put back on the old one, and the same problems I’ve had with the new one appeared.

I’ve sent back the battery for not working properly, because I wanted this time to buy an original one. But still the problem now remains.

Help me pls !!

Thanks

Hello all, I have a brand new APC Back-UPS 900VA/540W, model BE900G3, that I just bought a few weeks ago since lately my area has been experiencing quite frequent brownout sessions. I don't get a lot of blackouts, but a few random flickers of brownouts here and there maybe once a month could occur, depending on the weather.

The intention here is not even to keep my PC up and running during a blackout, it's just to prevent my PC from shutting down during a millisecond blip of a brownout. My PC draws quite a lot of juice on full load, but most of the time, it is well under the battery's capacity, and does not shut down when I unplug the battery from the wall. It'll stay on, but I haven't tested how long it will stay on for.

Last night, I had two really quick succesive brownouts, each are split seconds and extremely quick. Lights did not turn off, and devices not on any battery backup seemingly did not even turn off but reboots anyway. The only reason I knew I had a brownout was because of those devices that started rebooting and making noises around the house, as well as all my ups backups that make beeping noises when they lose power temporarily.

However, for some crazy reason, my PC that's connected to the APC ups rebooted itself during the brownout! The PC itself didn't turn off as all the lights in the PC didn't even turn off, but something triggered the PC to reboot. Also typically, during a brownout, the PC would turn off rather than reboot, so it's even more odd. Even my server that's on another ups with a dead battery didn't cut off and restart.

According to the ups log, it states about 4 seconds between on battery and no longer on battery, and I've tested the PC running on the battery longer than that, and the PC wasn't even running any load at that moment. I believe the load should be around 50ish % of the battery capacity, so again, it shouldn't just conk out like that.

I'm not sure if it's some kind of setting in PowerChute that caused it, although I don't see any settings in the app that can initiate a random reboot.

Anyone has any insight that they can share on this? I don't think it's a bad battery since again, it's able to keep my PC on if I cut power to it. I also don't think it could be the app since I don't see any setting to reboot my pc. My thought it that kind of surge went through the USB cable to my PC and caused it to potentially reboot, but why wouldn't the surge protector on the ups protect that? Nothing really makes sense here, and it sucks because I wouldn't be able to use this ups backup if it can't prevent my pc from powering down or rebooting during a brownout, but now I also won't be able to return it.

https://preview.redd.it/ygc29lojoc2h1.png?width=694&format=png&auto=webp&s=b8eeaf1f7854e15359773f16a39fa88547edbbee

Looking for some advice, I have a pair of 12v lead acid batteries which are reading 2.5v. I appreciate that they're likely junk at this point. I have an old industrial charger with an infinitely variable voltage adjustment. What would be the best voltage to set it at, to see if these will take a charge? It also has an ammeter, so I can keep an eye on both gauges for any changes... and again, I understand that they will likely need to be replaced! Thanks in advance.

I was going to get a solar battery setup for my boatlift. The motor is 120v and 15amp. I’d have to get battery boxes to mount to the rails so less is more. My other thought would be getting a 2000-3000watt power station and just bringing down to the lift to plug in the motor each time.

The distilled water overfill leak went out through a single filler cap,our battery is a 3 year old insta brite 150ah Exide lead acid battery,the amount of surface covered by the leaked acid is around 25×15 inches wide and it also creeped and touched the entire bottom of a nearby steel trunk and it just sat there like that until we discovered it,my stress and fear of potential lead particulates are very high and I'm very scared if my family or me are in danger,the only help and advice I searched and got from were google ai search results and I don't know if they are accurate or not,some told me it was extremely dangerous and some telling me it's not that big of a deal,I will discuss more details if asked

I feel that many people still do not realize just how dangerous lithium-ion batteries can be; far too many people continue to simply toss them into the trash without a second thought. Based on what I know, here are a few safety precautions:

Do not puncture them.

Do not leave damaged batteries indoors; if possible, secure their terminals.

Take them to an official recycling or drop-off center.

It surprises me that—despite the fact that so many devices nowadays rely on lithium-ion batteries—people still pay so little attention to proper battery disposal.

I think it would be helpful if everyone could share some examples of dangerous incidents they’ve encountered, as well as additional safety tips on how to avoid such risks.

Got this sweet 90,000mah battery bank for use in outdoor activities like camping and hiking. But as of writing this thread, it rained where I was at and didn't realized my rain cover don't do too much against rain so it seeped thru the cover into the bag resulting in water entering my bag. Okay amount of water went in and out from the vents of the battery. How screwed am I?

Edit: one thing I forgot to mention was when I was shaking the water out, some light red color looking droplets fell out aling with rain water.

We are getting a 15 kWh lithium home battery installed, but the original installation was blocked in permitting, so the unit has to hang on the garage wall outside. The temperature in winter is sometimes -10F

Is this acceptable?

Hi, i got this external power bank a while ago (zendure supertank 26800mah)

But it always cut power at around 45% remaining, and after a few months of light use, 60% was the minimum capacity before cutting... That was a phone charge and a half...

Today i decided to disassemble it, the thing is an actual tank, the plastic clips are behind a lip so impossible to remove without breaking, and both lids are glued to the battery with strong double sided tape...

The picture of the carnage...

I uncovered the BMS, and the individual battery tabs were easy to access, so I tested the cells individually:

• Bat 1: 3.97V
• Bat 2: 3.99V
• Bat 3: 4.10V
• Bat 4: 0.97V

There is of course an imbalance, is bat 3 too high of is it acceptable ?

Do I need to change bat 4 or is there a way to revive it ? I have an RC battery balancer, it might be able to revive the pack ?

As you can see behind the BMS they are 4 pouch style lithum batteries:

BMS

Here are the pics of the main pcb assembly :

USB C in and out

Assembled view of the usb assembly.

Thanks for the help.

I am thinking of buying a new power assist for my wheelchair which costs a lot new, but since it needs a new battery is being given away with the chair (the person buys wheelchairs second hand and sells them so doesn't want to bother sorting it out). It specifies the battery in the manual as this:

11.4Ah, 292Wh Lithium-ion battery

Do any battery experts here know where I would go about sourcing one of these and how much about it would cost? (if it doesn't fit in the battery holder that's okay, as long as it would be safe to use if I mounted it properly)

Thank you in advance!!