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 wondering if there exist any (portable) consumer electronics devices - so like music player, mouse, flashlight, audio recorder - that take any chemistry rechargeable AA or AAA batteries, and can recharge them right in the device. [more inside]
I bought my iPhone last February. During what remained of that Winter, I would take it with me when cross-country skiing, walking outside, or taking the bus to work. It seemed to operate just fine, as had my prior phone which was a Samsung. This Winter, however, the cold weather seems to be seriously affecting the phone's battery life. The battery drains quickly when I'm outside and sometimes suddenly goes from 20% or more to dead. Today, I went out skiing with the phone. I was listening to a podcast and using an exercise app to track my speed and distance. When I started out the phone had 55%, but it died after only 10 minutes. The temperature was -10F/-23C. I've also had it drain quickly after waiting to catch the bus. Is there anything I can do to solve this problem and continue to use the phone in the Winter? Is this something the folks at the Genius bar can help with? Should I create some sort of insulated pouch for the phone? I realize that temperature can affect batteries, but I'm surprised because I didn't have this problem other winters. I know I've taken phones out in colder weather than today without such a sudden failure.
Do other peoples' cellphone batteries spontaneously discharge, or is it just me? [more inside]
Do you know anything about defective Blackberry batteries? Is there a definitive way to tell if a battery is from a defective batch? A list of bad serial numbers? Or a way to tell visually? [more inside]
My HP Pavillion dv6000 laptop works fine...except for one little battery related thing. [more inside]
What's the deal with NiMH AA and AAA batteries being 1.2V? [more inside]
The battery in my G4 Powerbook won't charge, and I am a long way from any technical help! [more inside]
So Energizer or Duracell? Or some other brand? I'm confused. Apparently they are both 5 times more powerful than the other. I'm looking for the best value-for-money AA battery on the market (i.e. battery hours per dollar). I understand it depends to some extent on the device. Let's say two devices - the TV remote control - and a digital camerra. Anyone have a link to the definitive report? [more inside]
Wii owners: How long did your original pack-in Panasonic batteries last in your Wiimote? [more inside]
Another question about NiMH rechargeable batteries: Can I use brand A batteries in a brand B charger? Also, how can I tell a 'smart' charger from the timed version I hear tell of? [more inside]
Can you mix rechargeable batteries with different mAh ratings? [more inside]
I need advice on how to charge my handies' batteries. [more inside]
Does anyone know a store in the Perth (Western Australia) metro area that sells 900mAh NiMH AAA batteries?