I have an iPhone 4 and since the iOS 6 update, my battery life is horrible! Help! [more inside]
The Apple Store Genius fixed my Macbook's problem while I was in the store, but now that I'm home again I'm back to square one. Help. [more inside]
Where can I find a replacement generic battery for VADO HD? [more inside]
Where in Toronto can I buy small cylindrical rechargeable 3.7V Li-ion batteries like the UltraFire, hopefully at a reasonable price? (or maybe they were 3.6V, I can't recall) [more inside]
How can I control/reduce the amount of power from a 12v battery? [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]
Please help me determine what happened to my car recently - was it the battery, the alternator, or something else? [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]
I have a brand new car battery. My car has some issue that is (still) draining the battery, after I already had a mechanic look at and fix what was supposedly the issue. What can I do so that my battery doesn't go dead and get ruined over the winter while the car is idle? [more inside]
I suspect that unscrupulous dealers buy used Lithium-ion batteries, reset or replace the circuitry so that the capacity and charge cycle count are as-new, and then resell the batteries as new. How can I collect evidence for or against this hypothesis?
What could cause the sharp drop in battery life for my iPhone 4S? Even if fully charged, it will deplete within 5-6 hours of idle time. [more inside]
so i "fixed" a relative's water-damaged macbook pro, but it still has issues. [more inside]
How often do I really need to drive my car? (goal: keeping the battery charged, engine happy, etc.) [more inside]
I messed up my travel packing, and I now need to buy a charger for a Canon S95 camera battery in St. Petersburg, Russia. Is there any place where I could get one for a reasonable price? I'm staying downtown.
Calling all electrical engineers! Need some clarity on how to figure out solar charging rates and consumption of a USB device... [more inside]
Do other peoples' cellphone batteries spontaneously discharge, or is it just me? [more inside]
How many AA batteries would it take to run a 3rd-gen iPad for one hour?
Bought my used 01 Toyota Camry from a dealership over a year and a half ago. Today they inspected the brakes and told me all pads need to be replaced + new brake fluid + powersteering fluid flush + resurfacing the rotors, and new battery. I have been taking this vehicle to same dealership for routine oil changes which include multi-point inspections, and only the battery was an issue in the past. Am I wrong to think that after just over a year and a half I shouldn't need so much work done- should I complain and write a letter, or is this to be expected with a used vehicle? [more inside]
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]
My Macbook used to give me a low-battery warning before it went to sleep: now, before the battery indicator even turns red, it just powers down without warning, and I'll lose anything I had open and was working on. What happened?
Fellow photographer Mefites, what are/were your experiences with this Flashpoint battery grip on a Canon EOS T1i? [more inside]
Replacement flat battery pack for a dead mp4 player. [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]
Best battery operated boombox [more inside]
How risky (or not) is it to buy non OEM batteries off of ebay from china for my cellphone? [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]
Does anyone have any experience using a wall wart battery charger, one for battery packs, as a power source wired direct to the machine that the batteries usually are installed in? I have a Wall-e and it has a dead batttery, one is ordered to replace that but I got to thinking of running the little guy off a long cord for the motion portion of his performances. The battery has a unigue connector to make the + and - stay correct and I could work around that part.
Phone's battery drain is draining my patience, after hours of research, two batteries, and several phone calls with T-Mobile. How do I fix this? [more inside]
what are the best practices for taking care of a macbook pro (specifically the battery) for someone who uses it intensively for 8-10 hours a day? [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]
Why can't I jump start my 2004 Ford Focus? [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]
Question about jump-starting a car: why did my neighbor absolutely insist I ground the negative clamp... to the battery? That seems unwise. [more inside]
What is the best way to regularly drain 6-8 AA batteries? [more inside]
Help me not hate my iPhone. [more inside]
Can anyone tell me what the purpose of this "Battery Connector" is? We purchased some replacement batteries for blackberries, and while we can read the engrish, we don't understand what exactly is taking place when we follow the instructions. Help me mefi!
Replacing battery in an Acer Aspire One with one from a different Aspire One design? [more inside]
Does an expensive battery charger do a better job of charging and maintaining NiMH batteries than a generic, cheapo charger? [more inside]
I am looking to buy a blackberry battery. Is there are store around New York City that sells this kind of battery? I don't want to order online and prefer to pick it up at a store and avoid shipping fees.
Are there ANY aftermarket (non-Nikon) batteries that work with the Nikon D3100? [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 am really wary about buying a laptop with a non-user-replaceable battery. Opinions on this? How painful/possible is it to get such batteries replaced when they fail? [more inside]
My car is revving automatically. Can I fix this myself? [more inside]
Why did my two smoke alarms stop working altogether when the batteries ran down? [more inside]
Will connecting an external monitor to a new Macbook Pro wreck the battery life? [more inside]