Hello, So I have a 9.6 volt NI-CD 4 hour quick charger and the battery(600mah) that goes with it, but I was wondering if I could charge a 7.2 volt 2000mah, Ni-Mh battery with it. If i can for how long?
Posted by ben2000 2 years ago
Hi, I have an electric e-motorcycle (Road Runner -several years old) and I need to get new batteries ASAP. Inside it has 2 rechargeable batteries. Does that mean I need to get 2 - 12V batteries, whatever Watts I like, based on however much horsepower I need.
Posted by MielV 8 months ago
I'm trying to solve a mystery with an old camera of mine(a kidak cx 7330). It showed a low battery indicator with a fresh set of batteries, as well as some older ones-so i assumed it was broken. Once i had it replaced (which was overdue anyway, its like, 5 years old), i popped in a set of rechargables which i got with the new camera, and it worked. i tried with another, not so fresh pair of energizers ... and it worked too. (all batteries are AA- i prefer cameras that use em, since they arn't toyishly small) Having gotten myself confused, i checked the voltages on all 3 sets of batteries. The fresh set was manganese, and 1.7v. The rechargables (nimh) were 1.4V and the not so fresh pair of energizers(alkaline) was 1.6 v and both worked. I'm wondering (other than what the hell is going on), if electronics have some kinda overvoltage protection, and if that was what was triggering off the issues, and if i ran down the manganese batteries to 1.6v or below, i could use them - that way i'd just use em for something high drain, and switch to them once its done.
Posted by faileas 8 years ago
I have an x-treme scooter 360 and the batteries are dead. i have 3 12v replacement batteries, but i do not know how to replace them? does anyone know...
Posted by denniswilliams 11 years ago
Has anybody tried to remove batteries from this?there are a bunch of dead 9V's in there and i want to get them to make battery clips from them.but the lid is small and it is spring loaded.I was thinking a speaker magnet on the end of a string and just drop it in and you get whatever you get.are batteries magnetic...
Posted by ledzep567 10 years ago
I'm sure this is a really simple question, but I'm still new to all this electricity stuff. If I had two D batteries in a battery pack formation, so I'm drawing current from both of them, if the wire coming off the positive doesn't connect to anything else, and neither does the negative, will the batteries drain faster than they would if they were just sitting there? Here's a (cruddy) diagram.
Posted by Bran 10 years ago
I was wondering if I could mount batteries on top of a glue gun. I cut the wire of the cord and i had two minicords and i ran those out of a hole i made in the top of the gluegun. any ideas on what batteries, a switch on/off method? and also how to connect the wires to the batteries would be extremely appreciated.
Posted by ledzep567 10 years ago
Is this somehow related to discharge rate? I'm trying to replace existing sub c batteries, but their price is put me off. Can anyone provide some info? If use equal capacity aa, what the difference gonna be (once again discharge rate)? I would really appreciate any info about this.
Posted by Extasy 6 years ago
Besides throw them away.Edit: Or make them into art. You can make anything into art, so that's a given.I have both rechargables and non-rechargables. And I can't be the only one with a buttload of dead batteries idly lying around the home left over from the 90s.
Posted by bodybreak 10 years ago
Hi, does anyone know how to replace r/c car batteries with normal AA cells (or pp3 or whatever)? This is really annoying me coz I have an old r/c car (pretty good one actually) but the battery has died and I was wondering how to replace it (or 'refresh' it if this is possible, which I don't think it is...). It would also be helpful to know a technique for finding out the voltage/amperage of the old batteries so I can fix it without blowing the electronics. Pictures would be attached but the uploader isn't working right now; I'll get them up as soon as possible. Thanks guys,
Posted by TurboSnail 6 years ago
Hi, I'm trying to figure out how to recharge these BATTERIES without having them blow up in my face. I'm very new to making my own electronics and a little timid when it comes to messing with batteries. I believe i need to use this DC jack connector? With this CHARGER? I'm using the battery to power 21 LEDS wired in parallel with resistors (3.4v 20mA) if relevant. I think i need to wire it up like in the picture. I guess my question is if i wire all these things together and try to charge the battery will it destroy something? Also if i wired two of these batteries in parallel can I still charge it the same way? How do i know i'm using the right DC jack connector and charger? Is there a specific switch i need to use? Any help would be greatly appreciated!!! Thanks!
Posted by kasmir 4 years ago
I was thinking about how much would cost making a lion battery bank with enough amps/hours to feed a car audio system (stereo + sub amp). Since this setup would drain around 25-30AH I definitely want a battery bank with around 150 AH capacity to get at least around 4 hours of music at max potency. Woulds this be so expensive? I know that lion batteries are getting cheaper and cheaper, but any idea about how much would this cost? I have made a research on ebay and amazon, I could not get an average idea, and considering many brands lie about the specs, I better first ask here to hopefully get some references. Thanks.
Posted by johanx4 1 year ago
Hey everyone. I'm fairly new to the hobby electronics world, and today I decided I'd build an electromagnet. I wound my coil around a steel bolt, and I used 3 Duracell AA (1.5V) batteries for a power supply. When I turned on the switch, I found that my beautifully wound coil took a little bit of prying to get it off of the metal base I was working on. I thought "Let's try 9 volts!" So I grabbed a Rayovac 9V battery that I had around and hooked that up in place of the 4.4V (measured) bank. The Rayovac measured to be ~9V. The electromagnet was noticeably weaker. When I tested my magnet with just one of my 1.5V batteries, it felt like it had similar strength to the 9V battery. Can anyone explain what might be going on? Short of that, could someone tell me how to measure the current coming off of each power source?
Posted by TheMike25 5 years ago
Any one know about how long 4 double a's wired in series will last with a 200 milliamp load, here is what the online LED calculator said, I'm working on putting this in a small flashlight:Solution 0: 1 x 2 array uses 2 LEDs exactly +----|>|---/\/\/----+ R = 27 ohms +----|>|---/\/\/----+ R = 27 ohmsThe wizard says: In solution 0: each 27 ohm resistor dissipates 270 mW the wizard says the color code for 27 is red violet black the wizard thinks Â½W resistors are needed for your application together, all resistors dissipate 540 mW together, the diodes dissipate 700 mW total power dissipated by the array is 1240 mW the array draws current of 200 mA from the source.-thanks
Posted by firemanfu 10 years ago
Hello, first off I'm new to this site. I found it Monday and I think it's great. A while back our local news had a tech guy on showing some new inventions with toothbrushes. Just for fun he also had a Crest Spinbrush with some extra batteries taped around the handle which raised the RPM's of the brush. Any idea what it would take to do this?? thank you Jethrow~
Posted by jethrow815 10 years ago
Hello everybody. I have a simply question... ¿its possible to use my WALKMAN without batteries, and use it with a battery like the cellphones has, so i can charge my WALKMAN and use it wihout buying batteries? Please let me know thanks!!
Posted by PatricioTissone 3 years ago
I'm trying to make a simple LED circuit with switch included in the circuit. Can someone suggest to me a 12V battery that is big enough to keep a 48 LED bulb system on for at least 24 running hours, but small enough to be the size of two fingers sticky taped together. Thanks guys, Nick
Posted by kritas 8 years ago
I have a project that I have been working on, and it currently runs on two different battery packs for different components. I want to put rechargeable batteries in these packs, and I want to install a wall charger to charge the batteries. I am having trouble finding a good tutorial on the circuitry of this. Will I need two different chargers for the two components, or can I charge both from the same power supply? Can anyone help me out? I can post some photos of the project and its current circuitry if needed, its a laser spirograph.
Posted by ugman77 7 years ago
I got my little sister these little rc cars made by tomy. they have infrared to avoid obstacles and navigate themselves (pretty cool) but they burn through batteries very quick. it uses 2 x AA non rechargeable batteries so i want to make them rechargeable. Here is my problems with current ideas, and the pictures really help explain everything so please look there. 1 normal rechargeable batteries --- will have to remove battery door every time and it is too much hassle 2 use rechargeable battery pack for wii like below -- not as common and expensive 3 heres the one that might work incorporate a 3v rechargeable power source with a dc charger port and 2 indicator leds, all in an enclosed 2 x AA battery holder HOW??? please help --- i just want to make it work out but i really dont care if i have to change the batteries or anything like that also, i need to make 2 of these so cheap please!!! and maybe add another led for the car to have a glow like pic 4? thanks rak
Posted by raykholo 9 years ago
Hi all, I've been trying to charge my iPhone 3g with AA batteries. I have the batteries, which are producing 6 volts and about 2700 millamps hooked up to a 5 volt, 1 amp regulator. Then I have the output of the regulator hooked up to a female usb, which charges my friend's phone fine (generic samsung). However, when I hook it up to my iphone charger, it doesn't seem like its charging and the charging screen does not come up. Does anyone know what the problem is? Thanks,
Posted by piratebadger 9 years ago
I have a couple of battered old car batteries. There is no local scrap dealer that will take them so I was wondering if it would be possible to extract the lead myself and sell it for scrap. I have searched on google and cannot find anything about this and I suspect it would be dangerous and impractical. However I thought there's no harm in asking here. I was imagining that I could open the battery up and pour the acid into some kind of strong alkali, neutralising it to make it safe for disposal. But then, I certainly wouldn't like to try this without some advice first. Cheers! Pete
Posted by peater 8 years ago
I tried to post this before, trying again. Im new to the forum and very impressed, seems like a friendly group. As to my question, been searching the net for info and can't seem to find any diagrams or instructions on how they should be hooked up. Have heard they hook up neg. to positive and vise versa to each battery, but I don't understand. Can someone help me out please? Thanks in advance.
Posted by bunedockmama 10 years ago
OK, so it's an attention-grabbing headline, but the potential is now there.Radio-isotope batteries (the same things that have kept the Voyager craft alive since the seventies) can hold a million times as much charge as a standard chemical bettery the same size.As radioactive isotopes decay, the charged particles they emit are trapped by semiconductors and turned into useful current. Past versions of the battery have used solid semiconductors, which suffer damage from the radiation, so need to be large to survive as long as the isotope. Now, a team from the University of Missouri has developed a liquid semiconductor that can survive the damage whilst having much less bulk, and have put together batteries the size of a coin. They are working on much smaller versions, capable of powering micro- or nano-scale devices.Just imagine the possibilities...University of Missouri - Nuclear battery linksBBC Story
Posted by Kiteman 8 years ago
Need some advice... I busk using a Fender Amp Can and a head set mic. The Fender amp can is a complete unit with speaker, amp, battery and charger (15v 400mha). The headset mic I run off a separate 12v SLA battery. I currently open up the Amp Can disconnect the internal battery, attach the external battery and charge it, then put the whole unit back together. I want to make an external terminal to connect the external battery for charging and this should be simple enough says I...hmmm...So I am canvassing for second opinions regarding possible problems and whether I should set the batteries in parallel or series? The Amp Can is an awesome little unit and Fender have stopped producing them so I don't want to do it any harm. I know I could just buy a separate charger for the battery but that would be more crap for me to carry and I don't have the $25 to spare just now...it would also be lame... Thanks for listening, Luke Some specs on the Amp Can: DESIGNATION TYPE PR 327 PART NUMBER 022-1270-000 (100 V) 022-1200-000 (120 V) 022-1230-000 (240 V) Aust 022-1240-000 (230 V) UK 022-1260-000 (230 V) Euro POWER OUTPUT 14.5 W into 4 âï¿½¦ @ 5%THD with fresh battery INPUT IMPEDANCE > 1 Mâï¿½¦ both channels INPUT SENSITIVITY 500 µV@ 1 kHz - gain switch in GUITAR 20 mV @ 1 kHz - gain switch out INPUT SENSITIVITY 5.7 mV, 1 kHz MICROPHONE SPEAKER 4 âï¿½¦, 30 W Special Design 6” speaker w/16 oz. magnet and paper coil former (P/N 050543) DIMENSIONS Height: 8.75 in 22.3 cm Width: 7.75 in 19.7 cm Depth: 6.75 in 17.2 cm WEIGHT 13 lbs 5.9 kg Amp Can™ is a trademark of FMIC. Fender ®, Tone-Master ® and Twin Reverb® are registered trademarks of FMIC. Product specifications are subject to change without notice.
Posted by unpredictableTP 8 years ago
I have been browsing the pages of ev conversions for motorcycles. I want to be sure on everything before i make a fiscal commitment. my question is: if it were raining and one were to ride through the rain, how much danger would there be and what things would have to be done to the motorcycle to avoid danger? thank you in advance
Posted by JZ Price 9 years ago
Circuit board I need to make a circuit board for a project. It is all 12vdc, I have a 1a fan and a 6a thermoelectric device one setting 1, plus another 6a on setting 2, and a 3rd on setting 3 So 1 is 7a 2 is 13a 3 is 19a How to make the board. Also a second device has the 1a fan plus a 4watt element, plus another 4w on setting 2, plus another 4w on setting 3 So 1 is 1a and I think 0.4a= 1.4a 2 is 1.8a 3 is 2.2a. I think
Posted by Johnieahenderson 1 year ago
I go to Togo, West Africa, and they already use, or need the black water tanks. they can have the water pumped using solar, windmills, or rope pumps, then allow it to fall, and light their houses with LED lights, and charge their cell phones. So what do you think, anyone have experience using these cheap hydro generators? Do they work? Do they last? Is there enough water pressure? Thanks, Andy Lee Graham https://www.hobotraveler.com/blogger.html
Posted by hobotraveler 10 months ago
So I understand how the WestingHouse Solar Powered Outdoor Lights. They use the energy gathered by the solar panel, convert it and store it in AA batteries. The LEd is then powered by these batteries. This is kind of a two part question. What exactly is stopping me from using a large Ni-Cd battery or even a car battery to be charged by an array of solar panels like the little ones that are used in the little outdoor lights?? Is there some sort of equation that would be helpful to estimate the amount of time it might take to charge these batteries? Any help is appreciated. Thank you.
Posted by slevin711 8 years ago
It has always bothered me when I disposed of spent alkaline batteries ( having 3 children , can add up to a lot of batteries per year).And there are no local or state programs for recycling these types of batteries where I live. I recently found a company that recycles all types of batteries and electronic waste by mail @ a reasonable cost. They also offer a municipal program for your town.http://www.batteryrecycling.com/new+iRecycle+kitscheck it out , it`s worth the 5 minutes that it`ll take you.
Posted by dolabil66 10 years ago
Hey ppl, I bought an energizer wii induction charger earlier this year. A few months later, I started getting a red flashinglight on the charger and the batteries wouldn't charge anymore. I got the battery packs replaced because it was still under warranty, and I still have the old battery packs. I opened them up because they're pretty simple to dismantle (just 2 screws) and there are two unbranded AAA batteries. I was wondering if any rechargeable AAA battery can be used with it. Also any ideas on other possible uses for this induction hardware? Check out the pics below:
Posted by atomicrabbit 7 years ago
I have a device that runs on ac (110-120 Vac - 180w). I want to make it portable so that it can run off a battery pack such as AA or 9 Volt or even a custom battery. Is this too much of a power requirement to make it possible??? thanks in advance for your help.
Posted by gadgetcrazy 10 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 11 months ago
Ok, hopefully I'm posting this in the right forum. I got LOTS of broken cell phones at home and even some spare batteries from said phones. So what to do? I'm going to use them in some wearable projects. The problem that I'm having is that I'm not sure how to connect the wires so that I can charge it and how to connect the battery to the circuit. There are lots of instructables here but hell if I can find the right keywords to actually find what I'm looking for. Any ideas? Tips for suitable instructables? Tips for better keywords? Keyphrases? Best regards! Osquar
Posted by Osquar 3 years ago
Okay, doing some throwie-inspired LED "artwork" and I'm using alkaline AA batteries instead of the CR2302s or similar smaller cells to get way more mAh and extend the life of my display. I've got all the proper resistors and AAs connected in series to get the right voltage, etc... but I want to rig up a second set of AAs in parallel. I've found a few posts and websites talking mainly about lithium cells and/or specifically rechargeables connected in parallel, but nothing on alkalines. I know to make sure they're of the same make, type, not to mix new and old (aka the same mA)... but will leaving parallel alkaline batteries connected until they are all used up cause any problems, possible fires, leakage, plagues, end of the world? I've found one web page talking about if one of the cells in parallel was lower in mA (or maybe only if it's faulty?) it could drain faster and possibly short, draining the energy from the other cells, possibly causing a fire hazard... Not good for my artwork or the places it will be displayed. Any thoughts would be greatly appreciated. Thanks for the help!
Posted by shanepollard 9 years ago
I have posted this this in 'Kids' forum also, I hope that is ok? MP3 Bedtime Stories ..... Battery Hi, new here so please bare with me.....long story cut short. My Grandson is five years old and I thought it would be great, and get him to sleep quicker at night, if I could come up with some method of playing MP3 stories. I know, CD player, etc. nope, at five years old they want to take EVERYTHING apart. So no mains leads, CDs, etc. What I came up with was buy a simple and cheap (£2.99) MP3 player off ebay, pair it with a small battery powered speaker (£5.99) and away we go.....doh! Both items are amazing and just right for the job BUT both are battery powered (will go flat after he falls asleep and they are left on) and two, they both have on-off switches underneath which stops me mounting them on a surface. Sorry this is going on so long....... What I thought of doing is getting a loooooooong lasting battery source (would 9v last a lot longer) and bringing ing it down to 1.5v (x2 one feed for each device). Then it wouldn't matter if they were left on overnight a few times - or am I deluded. Or better still, can anybody please advise? Both the speaker and MP3 player have internal rechargeable batteries but they rely on a VERY busy mum recharging them daily so I am looking for an alternative. thanks
Posted by TN1946 3 years ago
Hi all, new to this forum... I'm looking for some advice regarding an off-grid electrics setup i'm running. Currently i have a PV solar panel charging a battery bank through a charge controller. It's a 12vdc system. For 240vac i use a small (500W) inverter. For larger loads i use a diesel generator. The inverter is basic but very high quality sine wave, it doesn't do any charging nor does it automatically switch the load between the AC of the generator and its own AC (i do this manually). In order to recharge my batteries when there isnt enough sun (which is often!), i use a simple AC powered charger that isnt specifically designed for off-grid/solar applications. In other words it is not "intelligent" and doesnt have bulk, float or equalization settings - it's just a DC charger that gives decreasing current as the voltage of the batteries rises. In fact it is very prone to overcharging if left charging for too long and will keep putting current into the batteries even after they've reached 15.5vdc or more. My question is this: is it a good idea to feed the DC charging current from my AC-fed charger into my solar charge controller in order to allow the charge controller to regulate and/or limit the charge as appropriate? I did this for a period of time and it seemed not to cause any problems. However, my AC charger did eventually blow its recrifying diodes although i'm not sure if this was due to a separate issue with the AC power coming from my generator which at the time was an old one and may not have been giving proper AC voltage (it may have been low due to engine speed problems). The solar charge controller is a PWM type. The way i had it set up was the DC from the solar panel and the DC from the charger in parallel to the charge controller. If there is no difference between the DC from the charger and the DC from the solar panel, i don't see how there could be any problem as it amounts to the same thing as having two 12v PV panels in parellel. However, what i dont know (due to insufficient technical knowledge) is whether rectified DC is any different to the DC from a solar panel. My setup is as follows: 1 x 200W 12vdc PV panel 60A tristar PWM solar charge controller 2 x 6vdc Trojan t105 batteries wired in series to give 12vdc Mastervolt 500w pure sine wave inverter (12vdc in, 240vAC out) SDMO 6kva diesel generator (240vAC) Wolf Max 50 battery charger (AC powered 40A DC charger)
Posted by RionZion 2 years ago
Can anyone help me with this. I am wiring LED's to my halloween costume and I think I need a larger power source. I currently have 8 superbright white LED's wired in series to a 9V battery. Each LED is rated 60 mA and I need each to receive 3V. I am currently using a 100ohm resister with this. This size resistor is the smallest that I had so although I don't need that much resistance, that is all I had available. Can anyone give me any advice on this setup and on how I could make it better. The lights don't seem as bright as they should be so I am thinking that I can improve on this circuit.
Posted by graft21 9 years ago
Hiya, I need to power a LED strip of 3 LED lights with batteries. The LED box says it is a 12VDC light module, and on the back of the box it says the Input Power is 0.0453A. My limited understanding is that I should use a 9V battery plus 2x AA battery (I have limited space - a 8 AA pack wont fit inside my project)...is that correct? I need to know how long these batteries will last - if it is less than 10 hours can you suggest another way of powering it? I'm incredibly lost and very new to understanding all of this! Thanks in advance.
Posted by SonyaS2 3 years ago
Check this out! A team of German scientists has invented the world's first printable batteries. Thin, flexible and environmentally friendly, the batteries can be produced in large quantities for a fraction of what it takes to produce conventional batteries. The new battery is also different in other ways from conventional batteries. The printable version weighs less than one gram on the scales, is not even one millimeter thick and can therefore be integrated into bank cash cards. The battery contains no mercury and is in this respect environmentally friendly. Its voltage is 1.5 V, which lies within the normal range. By placing several batteries in a row, voltages of 3 V, 4.5 V and 6 V can also be achieved. The new battery was developed by a research team led by Dr. Reinhard Baumann of the Fraunhofer Research Institution for Electronic Nano Systems ENAS in Chemnitz, Germany. "Our goal is to be able to mass produce the batteries at a price of single digit cent range each," states Dr. Andreas Willert, group manager at ENAS. The batteries are printed using a silk-screen printing method similar to that used for t-shirts and posters. A kind of rubber lip presses the printing paste through a screen onto the substrate. A template covers the areas that are not to be printed on. Through this process it is possible to apply comparatively large quantities of printing paste, and the individual layers are slightly thicker than a hair. Therefore, the battery is suitable for applications which have a limited life span or a limited power requirement, for instance greeting cards. The researchers have already produced the batteries on a laboratory scale. At the end of this year, the first products could possibly be finished.
Posted by YourSolarLink 8 years ago
Can we only use the types of batteries listed in the Sanyo Eneloop Battery contest's description for the power source in our projects? My 9V clip flashlight technically uses a 9V, but it can also run on 2 AAs. Also, what about N's and the like?
Posted by Radioactive_Legos 9 years ago
Hello I have a bunch of AA rechargeable batteries and would like to use them. I could just go out a buy a charger but wheres the fun in that. I would like the charger to be close to the ones you buy, but of course with the instructables finesse. it needs to charge at least 4 at a time and tell me when there charged with an LED indicator. id like to see if it can be plugged into my USB port and charge. Thank You John F.
Posted by jwflammer 6 years ago
I have built a plasma speaker and I am using it for my science fair and while I was listening to my speaker I realized that sound was coming from somewhere besides the speaker(arc). I disconnected the arc and it was coming from the batteries! Is there any way to prevent the batteries from playing the music as well? Is it feedback? I'd like the science fair judges to only hear the arc, thank you. Also I used this guys instructible
Posted by firebird2000 6 years ago