Q:I bought a battery pack for a Game Gear (old sega handheld system) and it came with two parts the wall adapter and the battery pack that it connects to charge it and the charge light won't come on and it was practically new this item was something that was sold years ago is there something wrong with it or do I need to replace the battery part inside if so how do I do that??

TTY a different charging cable, if not the batteries defective

Q:Ups external battery how to take?

Avoid short-circuit the battery positive or negative, otherwise it will cause a fire or motor.

Q:Hello:I am trying to jerry-rig a head lamp for my biking @ nightI am wanting to power a single fog light with a 6V/2.8AH battery packI know nothing about power/watts reallySo, my question is: how many watts of a bulb should I use to power the foglight for atleast 3-4 hours?Thanks for your help!

A 12v bulb will need a 7.2 1400 mah battery to go for 3 hours, if your trying to jury rig this you should go with a rechargeable Drill battery of at least 16v level that way you have plenty of reserve juice

Q:I just bought myself a nice, new laptop. Now I've heard two different philosophies when it comes to making the battery pack in it last:A) always plug it in and use it as rarely as possible in battery modeB) always run it in battery mode until totally empty, then recharge, and use again in battery mode.Somehow, neither of these feel completely right to me. Memory effect, limited number of charging cycles what's the generally accepted opinion in geek circles?

There is no memory effect unless you're using an antiquated technology. Regular cycling is best. For lithium packs, a full discharge every six or seven cycles is recommended. For the remaining times, they like to be topped up frequently. Leaving it connected to AC is a sure way of killing the pack prematurely.

Q:I have a portable dvd that is model number pdv-288 that my dad got me years ago and it has been working fine but then when when to charge the battery after I have not changed it in years the green light on the battery would flash green the hole time it has been charging for over 10hours now but when I un plugge it from change just have the battery on the dvd only so I can turn it on to watch a move the portable dvd player light will not turn green to let you know it is on but when it is plugged in to the wall with or with out the battery pack plugged it it will turn on but i will not turn on with just the battery packand I was wornding how can I fix it.

Battery packs are usually built in but an adapter to work on 120vac or 12vdc just plug in. You can DIY a battery pack to work at the adapter plug in.

Q:Extensive battery pack - Battery packs that let you 3DS' power stay longerYou know, is there one that doesn't stick out and isn't any bulkier? Do you think there ever will?

Im sorry there is not one but with the new chargiing base you can play at the same time you charge it!!!!!

Q:I have an Xbox One controller. And I was wondering which batteries would work better and hold more energy? The Xbox One battery pack, or Energizer Rechargeable Lithium Batteries?

extremely tough subject. look into in the search engines. that could actually help!

Q:I have a Dewalt battery pack (DW0242) for a sawsall that I want to rebuild/convert from nicd to nimh.

I doubt it. You would need to modify the device and charger to work with the battery.

Q:can i make an r/c receiver battery pack using regular AA batteries.

tricky problem. look on search engines like google. this will help!

Q:I know there's a mophie, but I want a battery juice pack that has a tv stand. Skiva brand has one for iPhone 4, what about iPhone 5?

There's a 4200mAh (the fastest charger case for the iPhone 5) battery case here, it's ?35.99 but its worth the money - amazon .uk/Patuoxun?-4200mAh-External-Backup-Battery/dp/B00ATCGPPI