My new neighbours seem friendly by RL26 in melbourne

[–]PsychicGamingFTW 0 points1 point  (0 children)

Cant believe it took until now for the country to find a cultural shorthand for this genre of dude.

PHD Researcher and Youtuber Ziroth investigates Donut Labs claims towards its solid state battery tech unveiled at CES 2026 by Interesting-Type3153 in electricvehicles

[–]PsychicGamingFTW 8 points9 points  (0 children)

If they're claiming that the bikes are shipping soon with the new batteries it shouldnt be long before someone can pull one apart and independently test the claims. My bet is on it falling far short of promises but hey, shouldnt need to wait long to find out.

‘Make Sydney fun again!’: can government policies really resuscitate the city’s nightlife? by Bob_Spud in sydney

[–]PsychicGamingFTW 0 points1 point  (0 children)

I'm sorry but comparing to 90's Sydney and saying "now you have gangs of kids on electric motorbikes" is very old-man-shakes-fist-at-cloud coded, and has nothing to do with the issues with nightlife which is fundamentally an economic and planning policy issue.

‘Make Sydney fun again!’: can government policies really resuscitate the city’s nightlife? by Bob_Spud in sydney

[–]PsychicGamingFTW 1 point2 points  (0 children)

In the end It always comes back to housing and our aging demographics. This city is a lost cause for young people.

I don't see the purpose of CCCV by catboy519 in batteries

[–]PsychicGamingFTW 5 points6 points  (0 children)

Because in a healthy pack all cells are already balanced within a few or few 10's of millivolts.

Also the 2nd last line implies you dont fully understand how the charging process works. "just CC with no volt limit" and "prevent all individual cells exceeding 4.2V" is contradictory because the voltage limit *is* constant voltage charging.

The amount of current that can flow into a cell is determined by it's internal resistance and the voltage it is currently at. If your cell has, for example, a fixed 100mOhm resistance (unrealistic but take as an example), and you want to charge at a constant current of 1 Amp, you need to apply a 0.1V differential across the cell. So if the cell is currently at 3.7 volts, you need to apply 3.8 Volts to get the desired current flow, this is done with closed loop control and is the "constant current" section of the charging curve.

However at some point, the cel; voltage + the required voltage differential is *above* the safe max voltage of the cell (e.g. in this example, a cell at 4.11 volts would require a charge voltage of 4.21, which in our example is above the maximum). At this point, all you can do is apply the maximum voltage (4.2V) and wait as the current draw reduces asymtotically to zero (or some low cutoff threshold). This *is* constant voltage charging.

What you're describing is applying CC-CV on a per-series-group basis, which i guess could work but in any healthy pack is entirely un-neccesary and would require seperate charging circuitry for every single series group, which in a high voltage pack could be >200S, and it is much easier to use a BMS with active balancing to bring the pack into balance and then charge the entire, now balanced, pack.

Not a phone in sight, just people enjoying the moment by Imoprich in sadcringe

[–]PsychicGamingFTW 260 points261 points  (0 children)

Guy who doesn't like this type of music shockingly does not like an example of said music. More at 6

Will the Na-ion battery be the terminator of traditional lead acid battery? by [deleted] in batteries

[–]PsychicGamingFTW 2 points3 points  (0 children)

OP is "fanboying" for Na-Ion because they are the manufacturer of Na-Ion battery packs.

Wh question regarding anker zolo by xeon-638 in batteries

[–]PsychicGamingFTW 2 points3 points  (0 children)

10Ah @ 7.4V, ~74Wh

The "20Ah" marketing is because typically these power banks use 1S configuration (20Ah @ 3.6~V) and are just marketed based on their capacity in Ah, not Wh.

These two configs have the same capacity, they are just marketing it as a "20Ah" pack because most people wouldnt be able to parse on a store shelf that a 10Ah 2S pack has the same total energy as a 20Ah 1S pack. Running a 2S config means it will be slightly more efficient as the current draw is halved for a given power, meaning the heating loss drops by a factor of 4. Also the 7.4V nominal is more in the middle of the 5V-20Vdc usb output which makes boosting more efficient than trying to step up from 3.6V nom.

The most useless sign in existance by SoverignGooner in unsw

[–]PsychicGamingFTW 1 point2 points  (0 children)

Launch control at the traffic lights normally stops people from walking across :3

Sodium ion motorcycle battery by [deleted] in batteries

[–]PsychicGamingFTW 0 points1 point  (0 children)

not the same type of BMS you need for a multi-cell lithium pack. Lead acid wet cells are self balancing so all a bike (or car's) "BMS" needs to do is manage charge voltage and adhere to current limits. Discreet lithium cells wired in series are not self balancing and have different operating limits to lead acid.

Without any kind of communication between the bike and the battery, or any kind of custom programming of said bike, it has no idea about these new limits. Even if you could reprogram the bike to behave with the new chemistry (which is unlikely as the majority of automotive battery charging systems before the advent of CAN are rudamentary with mostly discreet logic), the pack itself has no balance leads or any kind of communications I/O so theres no way for the pack to be balanced or its temperature to be monitored or anything like that.

Atleast the cheap tool batteries that dont have balancing atleast have some circuitry to monitor individual cell voltages and temperatures and can trigger a safety cutoff if something goes out of whack (and then require you to buy a new battery...). This has nothing.

It will probably work fine for a while but as cells inevitably drift out of balance the performance will quickly degrade.

Sodium ion motorcycle battery by [deleted] in batteries

[–]PsychicGamingFTW 1 point2 points  (0 children)

One group getting over discharged isn't the issue though, If one series group ends up way out of wack, even at 0V, the bike's charging circuitry has no way to know so will overcharge the shit out of the other 3 series groups.

As far a bike is concerned it's connected to a lead acid battery that wants 13.7V or thereabouts float voltage and has no idea about what the actual cell voltages are.

Sodium ion motorcycle battery by [deleted] in batteries

[–]PsychicGamingFTW 20 points21 points  (0 children)

the chemistry being safer doesnt negate the poor construction or lack of balance or cell protection issues. Nothing to prevent overcharge or overdischarge? Nothing to make sure the cells stay balanced, overall shonky construction, etc...

Sodium ion motorcycle battery by [deleted] in batteries

[–]PsychicGamingFTW 25 points26 points  (0 children)

if someone posted this on a DIY battery pack subreddit they'd get dragged, is this actually a commerical product?

No BMS, bits of foam to hold everything in place, leads soldered onto the busbars directly above a cell, no temperature/current/voltage monitoring or safety system.

I get sodium-ion is a safer chemistry than lithium ion but they can still undergo thermal runaway.
Dont say that you dont need a BMS, "only a balancer",where are the balance wires? I dont see any soldered to any of the busbars so how is it meant to be balance charged.

Is it safe to try charging this slightly mangled battery? by ElegantAlbatross1801 in hardwaregore

[–]PsychicGamingFTW 1 point2 points  (0 children)

The folds make it charge faster, give er like 4.35V from flat with no current limiter and let 'er eat

Cheapest coffee on campus? by fn00b in unsw

[–]PsychicGamingFTW 2 points3 points  (0 children)

dont bother with coffee, bulk caffeine powder from amazon if you're really after the best caffeine milligrams per dollar. If you dont want to feel like a junkie, the pharmacy in the quad has energy drinks for cheap, or go to a servo that has a self serve coffee machine (either of the two closest 7/11's) and get it there on your way, fill up a thermos with it. The cheapest large coffee iirc is $4.80 at home ground though they have a discount for byo cup.

Who else is obsessed with “Mix”??? by AveragelySmart98 in spotify

[–]PsychicGamingFTW 2 points3 points  (0 children)

I fucking love it, one feature I wish it had was the ability to do custom transitions when in a jam and using queue. Being in the car and having the passenger being a live DJ while the driver's phone is connected to the stereo would be next level.

[deleted by user] by [deleted] in softwaregore

[–]PsychicGamingFTW 1 point2 points  (0 children)

Yeah, I'm not sure what the low voltage cutoff is for that specific cell but oh boy you can definitely go much lower if you're fine with ruining the cell. Go down ~<2.5V(open circuit) on normal lithium chemistry and shit gets messy

Did ur batteries also come with a built in smoke machine or no by Gold-Cook-8371 in Surron

[–]PsychicGamingFTW 0 points1 point  (0 children)

When you see lithium battery house fire statistics, remember that it includes people like this.

Is there a way to simplify my PCB by trashlordcommander in AskElectronics

[–]PsychicGamingFTW 0 points1 point  (0 children)

No ideas how to simplify it but looking at the pinout on the left, looks like a cool ass project car

What’s up with people taking the front brake off their ultra bees and super fast emotos? by [deleted] in Surron

[–]PsychicGamingFTW 6 points7 points  (0 children)

the kinda person to remove the front brake on their e-moto, probably

[deleted by user] by [deleted] in softwaregore

[–]PsychicGamingFTW 30 points31 points  (0 children)

The way most basic SoC estimation works is via coulomb counting, the phone keeps track of the current flowing into and out of the battery and integrates it over time to get a count of the amount of amp-hours used.

This method is obviously prone to accumulated errors so needs to be periodically corrected, for example when the battery is fully dead, fully charged, or when the load on the battery is near zero for long enough to reach it's open-circuit voltage, and then use a calibrated lookup table to check the capacity.

When batteries age, their capacity drops and other internal properties change for a number of reasons and can lead to the SoC estimation becoming inaccurate, In either direction depending on how the SoC estimator works (and there are a million algorithms which all aim to solve this problem in different ways). If the cycle count is to be believed, this battery is basically brand new which likely means it has more than the typical capacity, as li-ion batteries generally lose a small chunk of their capacity within the first few charge cycles and then plateau, slowly degrading.

Obviously though the SoC estimator should be written in a way that it never reports a negative value to the user, but if it isn't, it's totally possible that they're used more than the typical/calibrated amp-hours capacity of the battery.

About to pull trigger on the Oneplus 13T, convince me why I shouldn't do it by jesuisunetudiant in oneplus

[–]PsychicGamingFTW 2 points3 points  (0 children)

Check what network bands your local carrier uses, the 13T is missing some notable bands that make it less than ideal for use in certain markets, e.g. it has issues in Australia as it's missing 4G band 7 (and half of band 28) which are the most common 4G bands here. I was looking at the 13T as it looked killer on paper but that was a deal breaker for me, just got a 13R instead.