I would like to run some portion of one of those cuttable LED strips off of a battery or batteries. Is this possible? How do I calculate how to do that given that these strips use 12v DC converters to run when plugged in?
I'm looking for a new battery for my old Lenovo laptop. The OEM Lenovo batteries are pretty expensive ($70 and up). I would like to buy a cheaper aftermarket one especially since the laptop is quite old and might not last another 2-3 years. Can you recommend good places to buy online? [more inside]
As part of an art project, I would like to be able to use my Canon Selphy CP910 portable printer to print about 30 4x6 prints while at a remote campsite for 5 days. I was thinking maybe I could get a portable, rechargeable UPS like this. How do I figure out how many prints I can get out of something like that? Is that the best option? [more inside]
I recently upgraded my cell to a Galaxy S7 Edge. My previous cell phones had removable batteries, and I preferred keeping a fully-charged backup battery on me or swapping batteries out and charging the batteries separately. The new phone has no removable battery, and I would like to make sure I'm charging the battery in the best manner possible to prolong the life of the phone, but my google-fu is turning up some conflicting information. Please help me figure out an optimal charging method to avoid shortening the battery's lifespan. [more inside]
I tried to jump start my car with two different cars on the other end. What's my next move? [more inside]
Workmen just came to my new apartment to remove a broken washing machine. After they left, I found a crushed AA battery where the machine was left. I have no idea how old it was or if they crushed it moving the washer. There was liquid on the floor, but that could have been from disconnecting the washer. How do I clean this up safely? [more inside]
I'm looking for the best product - case or wallet - to boost the battery life of a Samsung Galaxy S6 Edge. My previous Galaxy had a removable battery so this was easy, but the sealed design of the snazzy new models means I need some options. [more inside]
What is going on with the battery of my Samsung Galaxy S Tab and how can I fix it? [more inside]
Last Thursday, my 2008 Scion xB had its alternator die. I picked it up yesterday from the mechanic, and a new alternator and new battery later, it runs fine, except for one thing: it gets a case of the shakes like it wants to conk out when it is idling. Could this be related to the aforementioned alternator problem, or is it something else? [more inside]
I wonder if having 4-5 Word files open (including 2 always, just for for convenience) will drain my Dell Inspiron 11 3000 series battery quicker than just using one file at a time. I wonder: Does more tabs being open in a broswer mean more battery drain? Is a nonactive YouTube tab best being closed till used? I wonder if even having calendar, weather -- stuff I seldom open -- pinned to my taskbar run the battery down more quickly. Same question regarding having several Adobe Acrobat Reader PDFs ready at hand...just comic book pdfs. These things take so little space on the hard drive, so I figure they'd also use less RAM than other actual heavy programs, thus would be easiest on the battery-time availability. Correct me if I'm wrong, but having Foobar, Windows Media Player, and Spotify open at the same time will drain battery faster than having one going, as well as slow things down generally? Add to that the Word, Acrobat, a broswer... Thanks.
We are getting to the time of year where I am going to have to start mowing the lawn. Our old reel-style mower died at the end of last year, and it kind of sucked anyway. I do not want to mess with gas. Do you have an electric lawnmower, either corded or battery powered? Is it great? Is it terrible? Please tell me about it. [more inside]
I have to jump my car almost every time I drive it in the wintertime. Help! This is not fun at all. [more inside]
Dead six-year-old car battery last night. Replace? [more inside]
My father-in-law needs a CPAP machine to sleep well. What do you recommend for a portable, battery-powered version? [more inside]
Just went out to the family car to find it has a flat battery. Such a lovely day outside, I really don't feel like jump starting it, and I don't need it today. However, I was speaking to my father (who's overseas, I'm house sitting) and he'd prefer I do it today as car batteries shouldn't be left in an uncharged state as doing so does damage. Is this true? [more inside]
My Canon S100 is just two years old (so out of warranty). I bought 2 batteries with it, and two more generics a year later. Now when I put any of the four into the camera I get a black screen with white text saying, "Change the battery pack." [more inside]
Right now I'm at the airport, waiting to fly into DC, and just realized I forgot my charger. I'll see what I can pick up at my layover, but I would like to a) not fry my laptop and b) continue to use my laptop. I would like to buy the charger after checking into my hotel. I will not have a car. Relevant facts: 1) The X220 is the small Lenovo Thinkpad (not touchscreen.) 2) Staying in Dupont Circle 3) No car
I have a good mix of AAA, AA, C, D & 9V rechargeable batteries. Are the mindblowingly-expensive Powerex chargers the only game in town for getting a decent charge, or are there other options? [more inside]
Or what do I have to look for on a portable generator to recharge my camera and tablet. [more inside]
I have an 8-GB Nexus 7 that's about a year and a half old. Its battery life seems fine, but the actual charging takes an unreasonable amount of time. When it was new, it charged in about 2.5 hours; last night it took 7 hours to go from 30% to 60%. I'm using the adapter and cable that came with it. Is there anything I can do to make my device charge faster?
My macbook pro battery life is awful, and it shouldn't be. What can I do about that? [more inside]
This has happened over at least 3 different cellphones, from HTC and Samsung. The battery will work fine for months, and then the phone will lose the ability to recognize that it is charging. [more inside]
Greetings - I "inherited" a MacBook Pro last year. It was a Apple MacBook Pro Core 2 Duo 2.4Ghz from Spring 2008. So it was 4 years old when I got it and I was told that the battery was dead and as long as I kept it plugged in, it worked fine, however, I would need a new one. So last year, I purchased a new battery and installed it. However, I am still noticing that the battery life is horrible. It seems like when I am using it to type a document or check emails and surf the web, etc, I literally can watch the battery drain. I would assume that it might hold a charge of about an hour and a half maybe? Is there any way I can "test" it to see what my actual battery life if? To ensure there isn't something else going on? Any suggestions would be helpful. Thanks,
My Acer 5742 has become choosy about which plug sockets it will charge from. Why? Do I need a new battery? [more inside]
Interested in a Netbook or lower power laptop that runs cool (doesn't require external cooling like this) and has long (6-8 hour) battery life. Would like to run Windows 7 so Chromebook is not a good candidate for me. And of course want to come in around $200. I know there a lot of candidates here but would really appreciate user's real life experience. Thanks.
So, I've made the fatal mistake of performing several upgrades at once, and I could do with some advice on where to go now... is my problem with charging time and battery life my new SSDs, my new OS, or something else entirely? Generic snowflake details to follow: [more inside]
I have an older MacBook I use when travelling (four or five times a year), and then the odd occasion when I am away from my office desktop. The battery on the MacBook died a few months ago, and I am guessing partially because I haven't been using it frequently enough. I am hesitant to replace the battery, figuring the same thing will happen again, is that right? Is there a downside to not having a working battery on the computer itself? And lastly, is there a problem with leaving the dead battery in the computer?
Please help me think through this car battery problem. I have a new battery, but no car power. Details inside. [more inside]
I have an iPhone 4 and since the iOS 6 update, my battery life is horrible! Help! [more inside]
How can I continuously run a 3W - or less - LED light with +/- 350 lumens as long as possible (1 year minimum) with a relatively compact battery source? [more inside]
Which batteries can I purchase to replace the original from my scooter, a 2007 Honda Metropolitan? [more inside]
My Android phone, a Samsung Nexus S, operates on Jellybean 4.1.1. Since the latest update, I've noticed a dramatic decline in the battery life--it will go from fully charged to dead within 3 hours of intermittent use, regardless of whether I'm on a 3G or Wifi connection. How can I optimize the battery life on my phone without losing its functionality? [more inside]
How many AA batteries would it take to run a 3rd-gen iPad for one hour?
Is it sufficient for two occurrences of "Oops I Left The Headlights On" to completely kill an automobile battery's ability to maintain a charge? [more inside]
Is there a phone out there with a battery life like they used to have that can still let me check facebook every now and then? [more inside]
Is it worth replacing my UPS battery or buying a newer UPS that better fits my need? [more inside]
Laptop battery filter: My Lenovo SL510 wasn't charging my battery, and I foolishly assumed it was the battery's problem and bought a new one. But the new one wouldn't charge either. Any advice? [more inside]
Fellow photographer Mefites, what are/were your experiences with this Flashpoint battery grip on a Canon EOS T1i? [more inside]
I've got a four-hour layover at Chicago O'Hare tomorrow afternoon, during which I'd like to buy a charger and spare battery for my Fuji X100. [more inside]
I inherited a 1988 John Deere 160LT Lawn Tractor. It has been difficult to start. I was advised that my battery did not have enough cold cranking amps, sp I bought a more powerful twelve-volt battery today and I still cannot start the mower. I can, however, hear a click inside the engine compartment each time I turn the key. [more inside]
I'm doing a craft project and would like to install two red LEDs that are powered by a battery pack with an on/off switch. I would love your opinion-advice on what to buy and where to buy it. [more inside]
Is my ipad2 up to the job? I have to give the same hour-long presentation in three separate sessions in one day. I am planning to use Keynote on my ipad2 attached to a projector but I'm worried about battery life on the iPad. Does anybody have experience using their iPad in this way? I will of course, turn off every battery draining thing I can find. I could also switch to my iPhone 4S if I had to, I guess. Will I be okay for three presentations?
New Year's edition of "my macbook pro is suddenly slow"... [more inside]
What is the best way to regularly drain 6-8 AA batteries? [more inside]
Is my laptop's battery life normal for it's age? It's used and I know next to nothing to laptops. More inside. [more inside]
I'm trying to resurrect an old Casio CPS-85 88 key keyboard. When it was given to me, the power jack was cracked, so I desoldered it and soldered on a new one. No luck; I can't get power (even with a different power supply). So I'm stuck running off of a lot of D batteries. As using D cells is both wasteful and expensive.is there any way for me to rig an external power supply to the battery terminals in a safe manner?
Follow up to previous question....4yo Dell Inspiron laptop suddenly giving me the old "Plugged in but not charging" routine. Froze the battery for a day but no luck. So I bought a nice new one from Amazon that charged right up and worked for a week. No this one is giving me the same message. Any ideas? Or a place to turn to troubleshoot things? Any help would be appreciated.
Battery or Alternator? Clues inside. [more inside]
Which Macbook battery to buy on eBay? [more inside]
Looking for a specific Android battery level widget... [more inside]
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