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Galaxy Note 3 powered by 3 3500mAh 18650 cells : techsupportmacgyver

 6 years ago
source link: https://www.reddit.com/r/techsupportmacgyver/comments/75acgm/galaxy_note_3_powered_by_3_3500mah_18650_cells/?st=J8LFF27O&%3Bsh=8c4b7c22https%3A%2F%2Fwww.reddit.com%2Fr%2Ftechsupportmacgyver%2Fcomments%2F75acgm%2Fgal
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Galaxy Note 3 powered by 3 3500mAh 18650 cells

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level 1

For curiosity sake, have you ever successfully boarded a plane carrying it?

level 2

Nope, and I won't attempt to. While it may be safe, TSA isn't likely to believe that especially with all the buzz around exploding vape devices and exploding phones. I have an OEM battery and unmodified Otterbox case in case I need to fly somewhere.

level 2

I brought my vape and batteries on an international flight yesterday. No issues whatsoever. Just took it all apart and stored everything in their approriate containers on my carry on.

level 1

This seems like more of a subreddit for sketchy modifications, but I can't find a proper subreddit for something like this, so here you go. An 18650 powered smartphone done right.

Been using this since May. AMA?

Edit: I removed the Facebook and Messenger apps and the battery instantly started lasting much longer on a single charge. Took it off the charger at noon on 10/11. I'll report back with a new 100-0 up-time whenever I reach 0.

Edit2: I ended up topping it off before I went somewhere. I'll have to try that again some other time when I'm less likely to go out.

Update!: I upgraded from using Efest 3500mAh cells to LG E1 3200mAh cells. While this may seem like a downgrade by looking at the rated capactity, the fact of the matter is that the phone cannot use any of the capacity under 3.5v, which is where a good bit of the Efest cells energy was. On the LG E1 cells however, nearly all of its capacity can be used without the cells dropping below 3.5v. In addition to that, these cells are meant to charge to 4.35v which is what the phone charges to. Both of these things make these cells perfect for this application. The phone shut down after 5 days, 7 hours, and 29 minutes. This is with me using WiFi constantly, GPS every other day, and music streaming over 4G LTE every other day, and of course the daily Reddit, Snapchat, and Facebook browsing.

level 2

This is a subreddit for sketchy modifications so I think your post fits right in!

Do you have a fire evacuation plan for your home? Do you practice it regularly?

level 2

You might like r/18650masterrace and they might like this too ^_^

level 2

I’ll bite. So what sorta battery life do you typically get?

level 2

I like that the 18650's are super easy to replace but why not a flat cell lipo?

level 2

How does it charge? Do you remove the batteries, does it have a dedicated port, or can it actually charge through the phone's internals?

level 1

This is r/Android's wet fucking dream.

level 1
Comment deleted by user · 5 yr. ago
level 2

I would really like to do that, but I'd also want the silicone part of the case as well. I'm not sure how to make a proper silicone case though.

What I did here is what I determined to be the route that would allow me to keep the silicone and keep it looking somewhat nice. No 3D printer, but it is made out of plastic by hand. The cells are interchangeable, but of course either the silicone back has to be removed (easier), or it must be unlaced first.

level 2

I am sure most will be like "This belongs in the r/diwhy

Who would think that? I'm sick of my phone struggling to make it through the day. Last time I had a phone that could was my aftermarket battery in my Galaxy S2. People made fun of my brick shaped device, but who's laughing when my phone is still at 50+% come bed time?

level 2

I have some really 5200mah 30C rc lipo packs. That would be some good jerry rigging. Though if you made the mistake of popping a charged cell it would make a good fire.

level 2

Not trying to dump cold water on this, but isn't this about the same as plugging the phone into a big power bank and taping them together?

level 1

If I recall correctly a similar setup burnt down one third of Chicago back in the day

level 2

Sounds like it wasn't very similar at all.

level 1

Be prepared for a dozen "It's a fire hazard!" posts.

level 2

as long as there's no mixing of cell capacities, this ones actually fairly safe. well, safe-ish. new cells, full charge, good to go.

level 1

As a Note 3 owner, I like what you've done here. I like the look of the laces.

level 1

I'm guessing you've never heard of zerolemon batteries?

level 2

I have, but buying a bigger proprietary battery just sets you up for the same failure later. These are standard sizes used in lots of things from laptops to electric cars. I'll always be able to find new cells.

level 1
[deleted]
· 5 yr. ago

Are you running a custom rom? If so, what is it? It looks pretty cool.

level 2

Phronesis N7 port 6.0.1 (yes the N7 irony is strong)

level 1

That's pretty cool, and easily replaceable afterward!

level 1

So as someone who vapes on mods powered by 18650's (they are the standard for box mods) my first instinct is that this is terrifying for so many reasons.... but, I'm not technically inclined enough to judge whether your setup is safe or not. All I know is as vapers we're taught to be skeptical and overly cautious with those cells as they aren't exactly "safe" and tend to explode if mishandled.

That said, I'd love to know what /u/mooch315 thinks about this.

level 2

I'd love to know what the battery guru thinks as well :)

level 2

there's nothing wrong here... similar cells in parallel going to a device that is expecting a similar (close enough) chemistry cell... only issue might be the phone expecting a much smaller battery may not charge this battery long enough to reach 100% capacity (lithium cells are charged CC then CV until max charge time rating of the cell)

level 2

And he's using efest cells, which are potentially dangerous.

level 2

Mods using 20 amps of power are not equal to a phone using at most 1 amp. I bet even mooch will condone this, with proper physical connection. I'd using some NCR or LG cells personally, but there's not much chance of stress failure on this arrangement.

level 1

As a vaper, I'm always thinking about the dangers of over charging, differences in battery chemistry and max amp drain among other things. Safely charging and draining 18650s requires some circuitry that cuts off charge when each cell reached an optimal voltage as well as distributing draining amps at the same rate across all cells during usage. My question is in what way did you account for all that when wiring everything up and how did you figure out the differences of the 4 contacts on the standard oem cell phone battery? Also, I'm almost certain those oem batteries have that protection circuitry built in so if you just wired in series with just +/-, would you consider rewiring to use some sort of protection circuit?

I could have missed it in the descriptions in the album or comments so sorry if already answered.

level 2

As least he's using Sony's in the first shot lol

level 2

Safely charging and draining 18650s requires some circuitry that cuts off charge when each cell reached an optimal voltage as well as distributing draining amps at the same rate across all cells during usage.

Charging lithiums is CC then CV until Max charge time of the cell... You can parallel lithiums without issue

level 2

Safely charging and draining 18650s requires some circuitry that cuts off charge when each cell reached an optimal voltage as well as distributing draining amps at the same rate across all cells during usage.

Charging lithiums is CC then CV until Max charge time of the cell... You can parallel lithiums without issue

level 1

I'm a bot, bleep, bloop. Someone has linked to this thread from another place on reddit:

If you follow any of the above links, please respect the rules of reddit and don't vote in the other threads.(Info/ ^Contact)

level 1

either the phone refuses to see the higher capacity due to being hard programmed to only think of any battery as '3200' or the battery top from the old cell has an ic that's hard coded as that capacity, so when the phone asks its like 'i'm 3200mah!'.

its sort of a toss up as to which. motorola for instance, is infamous for hard coding into the phones chips or compiling it into the os someplace.

level 2

Pretty sure its just in the OS. I know how to change it, I just thought it was funny

level 1

Is this phone your daily driver?

level 2

It is! I'm using it right now.

level 1

I really want to do something pretty similar to an Xbox 360 controller. I can fit 4 AAA batteries inside it. Can you charge it normally using the phone circuit? I really wanted to use a micro USB cable to charge the controller when needed, also how do you make sure they don't overcharge? I have so many doubts. I am a complete newbie on this department, so forgive me if I sound really stupid. But I was never able to find a way to learn it.

level 2

On a project like that you should check out sparkfun (google it). They sell li-ion charge controllers and one of them can handle charging and outputting voltage at the same time. I'd look into that.

level 1

The voltage difference is Killing me, 3.7 vs 4.3

level 2

Nominal charge. Check your phone battery, I bet it says that it's nominal is 3.8v, vs the 18650 at 3.7. The lipo pack in the phone usually maxes at (I believe) 4.3v

level 2

More like 3.8 vs 3.7. Or if you wanna go by max charge, 4.2 vs 4.3

level 1

Did anyone mention how extra dangerous it is to drop this?

level 2

3 months ago I fell off my bike onto concrete with my full 180lbs of body weight landing straight on the phone. Battery pack plastic got scuffed, silicone got scuffed, but the pack still works fine. It's safe.

level 1

As a fan of function over form, that phone is sexy as hell. Is that battery life accurate?

level 2

It was pretty accurate, yes.

level 1

Woah! Seeing that "39 hours" of battery kind of turned me on .. lol :)) Nice job

level 1
[deleted]
· 5 yr. ago

Given the shi*t happened with Note 7, this looks like a bomb.

level 2

Looks can be deceiving! It utilizes a li-ion protection circuit and is completely safe. (Oh, it's you again. Lol)

level 1

This makes no damn sense on a phone that you can replace the battery.

You could carry a few extra 3200mah in less space and switch out when needed, they even sell multiple battery chargers

https://www.mytrendyphone.co.uk/images/Samsung-Galaxy-Note-3-N9005-Dual-Battery-Charger-Black-06102014-2-p.jpg

And don't give me that "it takes a long time to switch out a battery" crap, I proved a long time ago it can be done in about 2 seconds

https://www.youtube.com/watch?v=LlJVGipOvEE

level 1

all that effort, and the battery life seems pretty terrible. or was that estimate under sub-optimal conditions (lots of data transfers, apps open, etc) ?

level 2

Seems terrible, you say? What sort of battery life do you get on your phone? What would you expect out of this one?

Before the mod, if I used the GPS to navigate somewhere in the morning, I'd need to charge again around mid-day. The new life seems about right to me.

level 1

This sub is out of control.

level 1

What is your average battery life?

level 1

That shoe is also a phone.

level 1

When I was a student, a long time ago in the seventies, I taped a Sinclair scientific calculator to one of these it lasted quite a time.

level 1

Nice. How much screen on time with your own normal use are you able to get with this?

level 1

I get unlimited free AA batteries, and this would be awesome as an external battery pack to charge my devices

level 1

This looks like a bomb that can sit in your pocket

level 1

There's just one problem. Smartphones typically use 3.8V cells whereas 18650 are just 3.7. That means you actually overcharge them when charging to 100%. Beware.

level 1

That's really cool!

level 1

Would be cool to see if your battery life would go up or down with a modern phone like the Note 8.

I'm guessing up since the SoC is more efficient

level 1

How much sot do you get

level 1

WTF am I looking at?

level 1

I just quit using my att note3, went to a lg v20.

I haven't looked back, and I LOVED my note3.


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