my dog learned polymorphism*
The moose likes Meaningless Drivel and the fly likes Rechargeable Batteries Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login
JavaRanch » Java Forums » Other » Meaningless Drivel
Bookmark "Rechargeable Batteries" Watch "Rechargeable Batteries" New topic
Author

Rechargeable Batteries

Gregg Bolinger
GenRocket Founder
Ranch Hand

Joined: Jul 11, 2001
Posts: 15299
    
    6

My wireless keyboard and Trackpad (both Apple) run through batteries at a good pace. Too quickly for my liking. I've never had much luck with rechargeable batteries but it has been a while since I've looked into them. Can anyone recommend a good brand? I'm not overly concerned about the price as long as they will recharge quite a bit, paying for themselves over time. Both devices take AA if that makes a difference on what one might recommend.


GenRocket - Experts at Building Test Data
Jeanne Boyarsky
internet detective
Marshal

Joined: May 26, 2003
Posts: 30123
    
150

I'm happy with Pearstone. I use them for my trackpad, wiimotes and a couple of other things. (I got a wired keyboard because I'd rather not fiddle with batteries unnecessarily. If they sold a wired trackpad, I'd have bought that.)

My trackpad has needed charging once (since July). Granted I use the keyboard much more than the trackpad. The wiimotes need charging every few months as well. The radio needs charging every 4-5 months.

They say it takes 4 hours to recharge, but reality says 6 hours. Charge time isn't on my list of worries though. I have extra batteries. I use AAA and AA batteries from Pearstone.


[Blog] [JavaRanch FAQ] [How To Ask Questions The Smart Way] [Book Promos]
Blogging on Certs: SCEA Part 1, Part 2 & 3, Core Spring 3, OCAJP, OCPJP beta, TOGAF part 1 and part 2
Randall Twede
Ranch Hand

Joined: Oct 21, 2000
Posts: 4340
    
    2

one thing about most rechargeable batteries is you should run them all the way down before recharging. otherwise they will think they don't last as long


SCJP
Visit my download page
Pat Farrell
Rancher

Joined: Aug 11, 2007
Posts: 4646
    
    5

If you need AA or AAA batteries, the photography world is your friend. They use tons of rechargeable in these sizes. A few things to note:

1) Sanyo Eneloop is a well like brand
2) the batteries put out less voltage than an alkaline battery, even when fully charged. Its simply a feature of the chemistry. For many loads, this makes no difference, for others, its a really big deal.
3) pay for a serious charger. One that can monitor the batteries, handle the automatic changing of rate to meet the specified curve, do an automatic discharge/recharge cycle, etc. like this: La Crosse Technology BC-700 Alpha Power Battery Charger.


Note, a good charger is expensive, ~$40. Any cheaper charger will be less than optimal, and you may find you have to frequently replace the batteries. This gets expensive quickly.

Depending on your usage pattern, you may not save money. It does feel greener to use recharagable, as nothing goes in the trash. But I'm not sure that the overall impact on the Earth is clear. Lithium Ion batteries require lithium, duh, and mining that is not trivial.

Stephan van Hulst
Bartender

Joined: Sep 20, 2010
Posts: 3598
    
  14

That's only the case with nickel cadmium batteries. Most modern rechargeables are nickel metal hydride. They don't suffer from this effect.

Lithium ion batteries (mostly used as battery packs for cell-phones, laptops, etc) should be taken care of in the exactly opposite way. You should prevent them from running down, because individual cells may empty faster than others, which will cause the 'slow' cells to recharge the empty ones, which kills them off.

[edit]

After gaining some googlesmarts, it appears the memory effect is mostly an old-wifes tale anyway. Don't worry about it. Just don't purposefully discharge your batteries all the way. If it happens it happens, that's what you have batteries for.
 
permaculture playing cards
 
subject: Rechargeable Batteries
 
Similar Threads
testing AA batteries with a multitester
Reducing your carbon footprints?
Which digital Camera should I purchase
laptop and battery
dead (flat) battery ??