UPS/Battery backup question - I need a battery backup power source that will last as long as possible. My load is only 30w, so I understand that even a small UPS will power it ok - but I need to maximize the time that the UPS will continue to keep it going. [more inside]
Questions about priming a new battery to maximize its efficiency. [more inside]
I lost my battery cover on my apple wireless bluetooth keyboard. Can I order a replacement? [more inside]
What's wrong with my car, and what's my best option for fixing it? [more inside]
I used to have a Sonic Impact T-Amp. It was incredible - a great-sounding battery-powered amp with an input for iPod/CD that could drive big speakers at volume. Mine broke and I think I might have thrown it away, which I regret. But in the meantime, is there something similar on the market? A small, great battery-powered amp? I'm based in the UK but would order from the States if needed.
It seems the ac-adapter plug thingy (i.e. the cigarette lighter) doesn't work in my car. I suspect a blown fuse. I have neither the time nor the inclination to take it in to get fixed if I can do it myself. Halp? [more inside]
Do you trust third-party batteries for your cellphone? Specifically I'm thinking about picking up some spare batteries for the HTC Evo, but I've been a non-removable battery phone user for so long that I don't know if I really should stick to the manufacturer's branded batteries or can safely save some money and look elsewhere (like a Seidio, for example).
Yesterday my car started fine, but today the engine wouldn't crank even once. What caused my car battery to fail so suddenly and without warning? [more inside]
Boston Cell Phone Filter: Please help me with this seemingly simple cell phone decision. [more inside]
Does leaving my phone's car charger plugged in to the car at all times significantly drain my car's battery? [more inside]
Why isn't my son's science fair project working? His classic potato battery isn't producing any electricity. [more inside]
Where to buy Canon CB-2LW Battery Charger in Orlando? [more inside]
Will keeping my iPhone in the charger reduce the overall battery quality and life? [more inside]
Canon 7D HD video: How many batteries? [more inside]
The replacement laptop battery I just received is listed as 14.8v while the one I use is listed as 11.1v. Both are 5200mah. Can I use this new battery without harming my laptop? [more inside]
Battery shelf manufacturers: I need links to manufacturers of steel battery shelves for large DC UPS applications, for use with AGM VRLA lead acid batteries such as 2V 600aH to 1200aH and 6V 220aH to 600aH+ sizes. Batteries will be Rolls or a competitor. The shelves should knock down into something that can be flat packed and reassembled at an installation site. Features for earthquake bracing and shock mounting are also useful. Where do the US RBOCs buy their shelves?
What types of rechargeable batteries will hold their charge over several days of non-use in a digital camera? [more inside]
I punctured the sealed bag encasing my Ipod replacement battery and I can smell a sweet gas. Nice right? [more inside]
What's been your experience with non-OEM batteries for (pre-unibody) MacBook Pros? [more inside]
How can I get a really really big rechargable "laptop battery"? Thinking 12-24 hours worth of charge on a laptop that can drain a high-cap battery in 1 - 1.5 hours. [more inside]
Did I kill this little Lithium Polymer (LIPO) battery? [more inside]
Used hybrid cars and their batteries. I want to buy a used hybrid in the US, looking at '04-'07 Toyota Priuses and Honda Civic Hybrids. Looking for your experiences with these cars, things to look out for, driving in winter conditions, and especially any solid info about the service life (yrs/mileage) of the hybrid battery. [more inside]
Why does my Macbook battery only last half as long now, but is still at 97% health? [more inside]
I have an iPhone 2G whose battery has not been holding charge well lately. I need a local to Los Angeles replacement. [more inside]
I need a replacement battery for my Asus 1000HE netbook. I've been looking on Ebay, and it looks like they have some 12-cell batteries, whereas the original I got was (I think) 6. Does anybody have one of these, to know whether they're a good deal, how much bulk they add to the computer, etc?
(Probably) really basic car question: my car is taking longer to start than it used to. Battery problem or something else? [more inside]
Does anyone know what's up with my car battery? [more inside]
Dead car battery, cable isn't long enough to reach - but I have another cable. Can I combine the two? [more inside]
How does my iPhone battery charge? I'd like to understand how my iPhone and its battery work better. [more inside]
Help us diagnose our Ford F150: what could be draining down the (new) battery overnight? We're suddenly seeing apparent battery drainage in our pickup truck, a 1994 Ford F150. Though the truck starts up fine, the dashboard battery gauge reads low immediately upon ignition, the windshield wipers are sluggish, and the dashboard lights are dim. We thought the old battery was likely dying, so we had it replaced with a new battery... but that hasn't solved the problem. [more inside]
I would like to learn more about large-scale UPS systems, particularly the battery strings used in traditional RBOC/Telco applications. These are the sort of beasts that use huge strings of 6V 220aH deep cycle batteries, or even large numbers of 2V 400aH batteries on very strong earthquake-resistant shelving wired up to create a 48V mega-battery. Can anyone point me to the most definitive reference materials on the subject?
Have you had any experience with in-car extra heaters like the ones on the linked page? example types [more inside]
2004 Honda Civic Hybrid won't start, but battery isn't dead. [more inside]
My 2004 Mazda3 hatchback with about 20,000 miles on it won't start. [more inside]
iPhone battery life: I'm flying across the Pacific tomorrow with a 2 year old and a 5 year old. They are iPhone fiends (god help them), but I need to know if there is a huge difference in battery consumption between the education apps they usually play ("Find the sheep"..."Baaaa") and videos. I suspect that videos will use up battery life longer than these really simple apps, but I'm not sure. Anyone know?
Would an embedded internal wireless 3G modem draw significantly less power from a laptop battery than an external USB wireless 3G modem?
Would an embedded internal wireless 3G modem draw significantly less power from a laptop battery than an external USB wireless 3G modem? [more inside]
How do I connect the replacement batteries in my UPS? [more inside]
What are my options for a cheap, small Mac laptop? [more inside]
Please educate me on car battery technology. [more inside]
The corner of the plastic cover of the battery on my Macbook has broken off. [more inside]
I have a Samsung TL320 digicam, but no battery charger. Where can I obtain a charger for it, ASAP, near Berkeley, CA?
How much will BitLocker eat my battery? [more inside]
Where can I find a 2/3a 700mAh 2.4v AC adapter? [more inside]
Can a Canon CB-2LV battery charger with output of 4.2v 0.65A safely charge a Canon Battery Pack NB-5L 3.7V 1120mAh(Li-ion)
Can a Canon CB-2LV battery charger with output of 4.2v 0.65A safely charge a Canon Battery Pack NB-5L 3.7V 1120mAh(Li-ion) if I cut the little bits of plastic stopping me out of the way?
I just changed my car's old dead battery with a new, just purchased one following the directions here. Even though I clamped the connectors down hard enough that I can't move either of them, the car seems to be completely dead --- it doesn't appear to be getting any power whatsoever. Any ideas what could be wrong? [more inside]
My dream device has only one function: you type on it, and it saves your text to be downloaded into a laptop later. It does this for a week without being plugged into the wall. Does it exist? [more inside]
Aging MacBook Pro not recognizing its battery. Not under warranty. Is resetting the PMU my next step? [more inside]
One battery, multiple tools: for what line of power tools did I see a commercial that featured one battery that you could switch out between the tools? [more inside]
My 18 year old son went to Express Oil Change to have a new battery put in his 2004 Ford Explorer Sport Trac. His battery was dead and when jumped off, it would not hold a charge. They put an MTP-65 Interstate battery in and charged him $146 for the battery alone. With installation, charging system testing fee, and taxes, the total cost was $208.93. Does that sound high? I was expecting to pay half of that.
My Aspire 3680 (crappy laptop PC) doesn't want to hold a charge anymore, with either battery. How do I determine if it's my laptop, my batteries, or my charger? (I have a VOM and know how to use it).