r/batteries

Just wanna be safe..

im new to the whole electricity business and my PSU shows that a 6V 12Ah battery is charging with more than 10 Amps and is starting to smell.

I recently purchased a new portable car jumper with 65W max capable charging input. I initially connected it to an older (10W?) USB charger and it took it about a day to charge from 50% to 99%. I waited and it did never did reach 100%, so after disconnecting it from the charger, I noticed that the stored battery capacity decreased from 99% to less than 50% in about an hour, with nothing connected to it. I then connected it to a 60W charger and saw that the 'fast' charge indicator illuminated, and within a few hours, the unit battery capacity reached 100%. I've now watched it for three days, and it remains at 100%. I would have expected that a charge from any source would be the same, is this normal behavior?

Lithium-ion/polymer batteries are well-known to prefer partial charges, but are slow full charges or partial fast charges more harmful to a phone battery?

I just found an unprotected 18350 Li‑ion cell in one of my flashlights. The flashlight wouldn’t turn on at all, so I took the cell out and tried to charge it. However, my charger shows it is only at 0.97 V now. I was surprised and stopped it immediately.

My charger is XTAR VX2 Pro. It has a refresh function, but only works for Ni‑MH, not Li‑ion. So my options would be to charge it normally or recycle it.

My concern is that since the cell has been over‑discharged deeply (much lower than 2V), there may already be irreversible chemical damage, and charging it could be unsafe, such as a fire risk.

So could you please advise me whether it is safe to charge it? Am I over‑reacting, or is it really unsafe? Also, could anyone advise on a protected 18350 cell?

Many thanks

https://preview.redd.it/sqv9d76qt2wg1.jpg?width=485&format=pjpg&auto=webp&s=1723ce90da88e440eb4d96856f9d39c9672fd626

Just a passing thought, as a kid I used to suck on these button batteries for the metallic taste, and these double AA ones because of this metallic 'juice' typa thing that came out of them. And it wasn't just sucking on the batteries themselves, I'd used to bite into them. I'm just wondering how I never had any problems even though I did it more than once as a child. Would be nice if someone explains.

Hi everyone,

TL;DR:

The Issue:

OP Nord 2T drains from 100 to 0% in a single day. This extreme drain occurs under all conditions:

• Old battery, brand-new battery all the same
• When turned on but with screen off
• When is completely powered off
• After a factory reset (both with and without logging into a Google account)
• With the SIM card removed and all settings, GPS, BT and Wi-Fi disabled

Battery settings don't show any specific app consuming all the power

The replacement battery had 55 % when received (was 2-3 weeks in transit, so the new battery itself seems fine)

My Question: What could be causing this, and how can I fix it? HELP!

Long Version:

I've had my OnePlus Nord 2T for over 4 years. The battery degraded over time, but that was expected, and in the end survived maximum of a day when used. I eventually upgraded to OP 13 and stored the Nord 2T on a shelf, completely powered off with about a 50% charge.

A few weeks later, I took it out to back up my photos, but it was completely dead and wouldn't even turn on. This seemed weird for a powered-off device. Over the next few days while I was moving my files, the phone consistently drained from 100% to 0% within a single day. This happened whether it was turned on but idle (with most settings off and no SIM), or completely powered down. I finally did a factory reset, but the issue persisted. I assumed the battery was simply dead and decided to replace it.

I ordered a new battery. When it arrived after 2-3 weeks in the mail, it was at 55% - meaning the standalone battery holds a charge perfectly fine. I installed it, fully discharged it, and then charged it to 100% to calibrate it. I left it sitting on my desk, but when I picked it up the next day to install some apps, it was completely dead again. I charged it back up, turned it completely off, let it sit, and by the next day, it was dead once more. How could it survive the weeks in transit when now, not even 2 weeks after it dies after a day turned off???

The new battery charges much quicker, so I don't believe it's the problem.

To reiterate, the phone currently has all connectivity features disabled, no SIM card, and was factory reset without even logging into a Google account.

At this point, I suspect it might be an OS. Does anyone know what else could be causing this or have any potential fixes?

I have some that say full charged on my meter, but won’t work in my 2020 traverse fob,

I am trying to make a pack using the ten power xg 50 cells. I am using .2mm copper with .15mm nickel. I just can't seem to get any good welds. Either it is to weak or it simply punches a deep tack into the cell/copper.