Does any body know how to get lithium out of those battery's? it produces hydrogen gas and may ignite on contact with water.
Posted by DELETED_DELETED_kruser495 11 years ago
Hey I have a cheap camcorder that runs on AA's but I want to put it on a lithium battery. What I want to use is just the standard battery out of an old phone 3.2v, I'd like to use these because I have a huge surplus of them. I have pretty much no knowledge of electrical circuits and so I need of bit of help. I know two AA's is 3v and any lithium battery is 3.2v, how could I step the battery down to 3v?
Posted by problems 8 years ago
Hello! I bought a li-on battery ( http://m.ebay.de/itm/281697770691?varId=580703135130) and it has this little switch. I want to build a boombox and dont want to open it everytime to turn it on or off. I also dont want to rip the switch appart because i sind want to destroy the batterypack. Can i leave it turned on and place a switch between the circuit and the batterypack? Or will i destroy it if i leave it on all the time?
Posted by Unirox 2 years ago
Hello Everyone! I am planning to make a rear bike light, which has rechargeable batteries through USB. I then decided to use Lithium Ion Batteries for it. But the problem is that I dont know what parts I need. It should be able to light up 4 COB LEDs (Each rated 12V, photo given) Till now, after looking at several other instructables, I am able to say that: 1. It needs a steup transformer from 5V TO 12 V - TP4056 (https://www.amazon.in/TP4056-lithium-Battery-Charging-Charger/dp/B00JQ2VG1A/ref=sr_1_8?ie=UTF8&qid;=1505148914&sr;=8-8&keywords;=lithiumion+batteries) or https://www.adafruit.com/product/259 2. It needs some sort of protection like: http://www.batteryspace.com/PCB-for-11.1V-Li-Ion-Battery-Pack-4.0A-limit-----PCM-L03S04-559.aspx 3. Also do can I allign three 3.7V Lithium Ion Batteries to make 11.1V? Please help me out Thanks!
Posted by nabeel.quadri 1 year ago
Hello, I'm looking for a rechargeable battery for a project and I'm not having any luck finding a suitable one. Here's what I need: The battery will need to be between 12 - 18v with between 1-2 amp. This will be powering a set of speakers, so not really sure what type of amp hours I need. The battery will need to fit into a tin lunch box. An idea I had was to use a 12 or 18v battery for Power Tools - not sure if it will work though. I also found this, http://www.altex.com/12V-Lithium-Ion-Rechargeable-Battery-Set-LBP-124500-P150057.aspx not sure if it is powerful enough though. Any thoughts/ideas is appreciated.
Posted by RabidNoodle 7 years ago
So I have an Idea for a charger for a portable computer. It will be solar powered, and charge li-ion batteries. My question is how could I simultaneously charge batteries and power the computer at the same time. No schematics are needed, just a quick written answer. Thanks!
Posted by Skiboy941 7 years ago
Hi, I'm a first time DIY-er and would like to build a useful, long lasting battery pack for my *new* laptop (late summer). I'm 17, and this would be a perfect project for me to finish in the next few months. I'll be working with my dad and asking my physics teacher, who seems very all-knowing, for advice. My teacher understands electricity and batteries better than anyone else locally and is leading our STEM team, of which I am a member and need this experience. Keep in mind that I'm not just doing this to have a (much needed) battery pack for my laptop. I got most of my information from here and will most likely be purchasing new batteries. As far as the housing of the components, I have a hard plastic, 10+ year old lightly used blue lego container in the shape of a kid-sized briefcase. Case: Old blue lego carrying case, 11” x 7.5”(9 including curved front) x 3.5” Insulation tape Batteries: (x4) Battery holders: (x4) PCB: (protected voltage is higher, balance charger required) Balance Charger: Fuel Gauge: DC port: Wire terminals (for organization) Balance charge cords: Optional inverter: I heard about these being inefficient, so I'm not sure about it. Please inform me if there are any other parts that I'll need or if I've left out any information. Also Inform me if everything I'll need for a lithium battery pack is on this list. P.S. The case was chosen based on the fact that it will fit in my backpack with my books and looks much less alarming and more like a DIY battery than a black box or briefcase. especially with the fuel gauge and plugged in laptop.
Posted by leaf26 5 years ago
I’m looking to build a custom battery back from LFE / LiFePO4 batteries or possibly Li Ion. I need someone familiar with power management and charge management circuitry in relation to these batteries. I’m looking to have someone to build a prototype for me, and consult me on modifications. Preferably I’d like to find someone around the Chicago – Milwaukee area who I can work face-to-face with, although phone-based work would also work. I am of course willing to pay for services rendered.
Posted by akira2501 8 years ago
I have several questions. But the basic idea is that I want to extend the runtime of a device (such as a cell phone, tablet, camcorder, whatever) by increasing the mah. So here are the things I am wondering: 1)Many lipo batteries have 3 or 4 contacts, one is -, one is +, and the others are typically data or something. can I simply connect additional lipo's (just the + and the -) in parallel with the corresponding contacts in the device? 2) Are there any ill effects of charging (presumably from the built in charger of the device, like a cell phone) and discharging (using the device) parallel lipo's? 3) They will all have the same voltage rating, but do they all have to have the same mah rating? thankyou
Posted by guyfrom7up 7 years ago
I write up a lot of guides on Instructables for various solar gadgets. Most of the Solar USB/ iPhone/ Arduino chargers. If anyone is interested in such things I sell them off my website, which I then use to make more projects or fund activities in my science classroom. I have several versions of my kits available as well as all the parts to make those kits, and even premade chargers for those who don't feel the urge to make one on their own. Solar USB Charger and Kit A basic USB charger that uses rechargeable 2 AA batteries, a DC to DC boosting circuit, and a 4V solar cell. Take the batteries out to charge, or leave it in the sun for a few days. Then charge up your gadget when need be. Works with most USB devices including Apple products (iPods, iPhones, iPads) as well as Arduinos. Fits nicely into an Altoids tin. Solar iPhone Charger and Kit More or less the same as the USB charger, but instead of having a generic USB port it has a dedicated iPhone/ iPod/ iPad cable. Which means it only works with Apple stuff. Features 2 rechargeable AA batteries, boosting circuit, Apple Connecting Cable, and 4V solar cell. Heavy Duty Solar USB Charger and Kit While the 4V solar cell in the other kits/ chargers fits nicely inside an Altoids in it is also quite wimpy. I took the basic design of the Solar USB Charger and replaced the 4V solar cell with either a powerful 6V 230mA or a 5.5v 320mA solar cell. In order to make things easier the solar cells plug into a 2.5mm jack on the side of the tin. Meaning you can leave the solar cell at home. The solar cells are also powerful enough to charge up a lot of gadgets directly from the sun if you have good weather. Works with most USB gadgets, Arduinos, and Apple products. Lithium Heavy Duty Solar USB Charger and Kit Due to the fact that big gadgets (like iPads) have insanely big internal batteries I had to modify my design a bit. The AAs in the other chargers were not powerful enough (unless you used 4 or 6 of them) to reliably charge up bigger items. I modified the design of the Heavy Duty Kit to replace the AAs with a Lithium battery and Charge Controller. With several battery options available, including a massive 6,600mAh one, these chargers have no problem handling the larger power needs. On a recent plane flight a charger with a 2,000mAh Lithium battery charged up my iPhone over 80% (on airplane mode while listening to music). Imagine what a 4400mAh or 6600mAh battery could do. The charger/ kit can fit inside an Altoids in with the smaller batteries. It features a powerful 5.5V 320mA solar cell and a 2.5mm jack and plug system so you can easily remove the panel. A nice addition is the Lithium Charge Controller which has status LEDs showing when the battery is charging and when it's full. It works with most USB gadgets, including Arduinos and Apple gear. I've used these kits with kids at my middle school, and have sold many kits to summer camps and scout groups. They take between 20 and 45 minutes to make, and only require basic soldering skills to put together. They all fit inside Altoids tin for cuteness factor, but can easily be put into something else. Modifications are endless. So there you have it. More Altoids solar thingys than you can shake a stick at.
Posted by BrownDogGadgets 6 years ago
I'm working on a project that uses lithium ion batteries as the power source and cannot figure out how to calculate how long it will run for. I have four 2.6Ah batteries connected in parallel, giving me a total of 10.4Ah of capacity. They're lithium ion so the nominal voltage is 4.2v and the minimum I want to bring them to is 3v. My project draws a constant 2.85W of power, regardless of the voltage put into it. What I want to know is, is there any way to calculate or even just approximate how long these batteries will power my project before they run out (the voltage drops below 3v)? The batteries are high quality, so the 2.6Ah rating is pretty reliable. Let me know if there are more specifications needed or something. Thanks ~Dudes
Posted by dudes 2 years ago
Hi, my name is Jackson Pugliese, and I am currently building a battery pack that will be consisting of multiple lithium ion batteries. Getting the pack itself together, is not an issue at all, however, what is an issue is battery shut off when charging. I would like to be able to charge my battery pack with some form of laptop charger, that outputs 12v, for a 14.8 volt lithium battery pack. The main issue is overcharging. Lithium ions explode, or catch fire if they are over charged, and thus is not an option for me, so to find a solution, I searched the internet, and two things came up. Option one, use some form of battery charger, that automatically shuts off when It is fully charged (which i do not want to do because I want to do it differently hence the instructable) And Option two, which came up alot, but i do not fully understand is I use something such as this http://www.amazon.com/Yeeco-Current-Polymer-Lithium-Protection/dp/B010NM52LG/ref=sr_1_2?ie=UTF8&qid;=1456701414&sr;=8-2&keywords;=protection+circuit+module+14.8+volt I do not understand what it truly is, nor how to use it, and would like someone to explain to me both of those things. Everything I am doing is safe, because I am using a en closer for lithium ions, in case if they explode or catch fire, so know one has to worry about anything not working. Thank you very much everyone for your time, and have a wonderful day!
Posted by merlinj 2 years ago
For electric go karts, which one is better (for the money)? Lead acid is by far much much cheaper, but it is much much heavier. With a heavier battery you need a stronger frame, which weighs even more. With all of this weight you need an even stronger motor to push it all. With lithium you can build a lighter, cheaper frame, and power it with a weaker and cheaper motor and still obtain the same speeds. Lead Acid batteries take up about 1/3 the weight of a gokart with rider (1/3 being the driver, and the other third being chasis and motor and such). Reducing the weight by about a third (honestly, lithium, batteries weigh like nothing) could have huge performance improvements. So, does spending more money on batteries, and saving money on chasis and motor equal out to spending less on batteries and more on chasis and motor?
Posted by guyfrom7up 9 years ago
Hi, So I have a AA battery pack inverter for some EL wire, and I was wondering if it was possible to replace the AA battery's with a lithium Ion battery to reduce its size. What kind of voltage should I look for/do I need to take into account amperage?
Posted by Fozzibehr 4 years ago
Hi, I have a remote that I'm trying to drive with an arduino. The remote usually uses a 3V CR2032 battery. I tried just using the 5V digital pin set on high, but that didn't work. Then I tried using a L293D motor driver -- with the lithium battery supplying the outside power. That didn't work either. Any ideas?
Posted by gluckc 1 year ago
Hi Guys! I have a bunch of 18650 lithium ion batteries that can handle a charge rate of 5C. Each one is 3,000 milli-amp hours, and I would like to build a charger for them as my project. I understand the mechanics of charging lithium ion batteries, and that they need to be charged at a constant current up until that current reaches 4.2 volts, than switch over to constant voltage. The constant voltage charging makes up about 20% of the battery capacity, and I am willing to forgo that amount. What I am trying to build is a constant current charger for it that would charge at a current of 1C, and shut off when it reaches 4.2 volts, and I would like some help as to how I would do this. I was thinking that I would have some sort of current source that supplied 3 amps and then have a relay that would shut off the current as soon as a voltage detector reached 4.2. I do not know much about current sources, so I am asking here for some help. Thank You for Your Help!
Posted by merlinj 1 year ago
I vote they extend the deadline...who's with me?
Posted by Lithium Rain 10 years ago
From EDN (Electronic Design News), comes this article: Skyrocketing energy prices and the growing concern over carbon emissions have focused attention on electric and hybrid-electric vehicles. New lithium-battery designs will be key technologies for efficient EVs and HEVs.By Michael Kultgen, Linear Technology Corp -- EDN, 4/9/2009Safely getting the most energy and lifetime from a lithium cell requires some sophisticated electronics. One requirement, for example, is the ability to measure the voltage across every 3.7V battery cell in a stack of 100 series-connected cells. How do you cope with the 370V of common-mode voltage and reject 100V of common-mode switching transients? The design of battery-management systems for EV (electric-vehicle), HEV (hybrid-electric-vehicle), and UPS (uninterruptible-power-supply) applications requires solving many such problems.How do batteries make cars "green," ...http://www.edn.com/article/CA6648791.html?nid=2432&rid;=8848980
Posted by Goodhart 9 years ago
Posted by Lithium Rain 7 years ago
Does anyone know the thickness of the 4th gen ipod touch battery? I'm looking for a thin lithium battery (less than 2mm thick) that has decent capacity (more than 300mAH). If anyone knows the thickness of the ipod battery (or any other suitable battery) it would be greatly appreciated.
Posted by guyfrom7up 6 years ago
I have to go to you>instructables>published (or unpublished) and select "edit" there if I wish to edit an instructable of mine FF 3 in Ubuntu.
Posted by Lithium Rain 8 years ago
If you have been flying your RC planes a lot and have found them getting a bit boring, go brushless and get lithium polymer cells. brushless motors are lighter and twice as powerful as brushed. lithium polymer batteries hold the most electricity to weight ratio compared to standard Nicd and Nmh. Dont believe me look at your cell phone open the battery hatch and take out battery its probably a Lithium polymer or lithium ion notice how light it is and small it is now look at the volts/ mAH pretty amazing hu? Got a laptop it probably got a lipo to. you want to make the switch but dont know what motor, battery, ESC (ESC-electronic speed control) to get, just ask and ill give you a hand! i will need to know the motor and battery that came with the plane/ or that u are using. Are you flying glow (gas powered) and wana go electric? i can help u out their too! Their are 2 kinds of brushless motors outrunner and inrunner whats the difference? well outrunners spin slower with more power so it acts like it has a gear box (this eliminates the need for a gear box reducing weight and noise) it also has a different design (look at pics). inrunners have a brushed appearance but their much lighter and more powerful u might need a gear box through. update 2/20/08 new image added (not all comment boxes are working)
Posted by i make shooting things 11 years ago