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Battery Recharger. Is this a good one? - Page 2

post #11 of 15
The BC-700 is an excellent battery charger that is reasonably priced. Besides charging AA and AAA batteries, it can test them and even "fix" some. I have one and highly recommend it, even over Sanyo's charger.

The Sanyo Eneloops are in a class of NiMH batteries called prechargeables because they usually have a charge already on them right out of the package. Unlike regular NIMH batteries, the prechargeables will maintain most of their charge for a year or more; regular NiMH will self-discharge in a month. Although other manufacturers have jumped on the prechargeable bandwagon, the Eneloops are still the most reliable. They also have a battery life of at least 1500 battery discharge/recharge cycles. I've been using them for several years and have yet to have one fail.

Having a good battery charger is imperative for achieving long battery life. Since heat is what kills batteries and charging batteries creates heat, it is imperative that they be charged at the lowest rate possible to ensure long life. LaCrosse has chargers that can charge faster but the BC-700 has the lowest charging rate available for the money. I have two LaCrosse chargers I keep in my camera bag along with several spare AA and AAA Eneloops. I also carry several spares in my purse. When a set of batteries run down, I pop in some of the spares, then recharge the discharged batteries later when it is convenient for me.

The charge Eneloops will not last as long as alkalines and regular NiMH rechargeables, but the fact that do not self-discharge while not in use and are not disposable make them well worth having.

Getting a good charger or two and the Eneloops may seem expensive upfront, but believe me, they will pay for themselves several times over. I'm as cheap as they come but even I can see that the Eneloops are a bargain in the long run.

Also, learning how to properly take care of batteries may be a bit of a PITA, but it's well worth taking the time to do so (it's really not that difficult).
     
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post #12 of 15
Thread Starter 
Quote:
Originally Posted by Lady Fitzgerald View Post

The BC-700 is an excellent battery charger that is reasonably priced. Besides charging AA and AAA batteries, it can test them and even "fix" some. I have one and highly recommend it, even over Sanyo's charger.

The Sanyo Eneloops are in a class of NiMH batteries called prechargeables because they usually have a charge already on them right out of the package. Unlike regular NIMH batteries, the prechargeables will maintain most of their charge for a year or more; regular NiMH will self-discharge in a month. Although other manufacturers have jumped on the prechargeable bandwagon, the Eneloops are still the most reliable. They also have a battery life of at least 1500 battery discharge/recharge cycles. I've been using them for several years and have yet to have one fail.

Having a good battery charger is imperative for achieving long battery life. Since heat is what kills batteries and charging batteries creates heat, it is imperative that they be charged at the lowest rate possible to ensure long life. LaCrosse has chargers that can charge faster but the BC-700 has the lowest charging rate available for the money. I have two LaCrosse chargers I keep in my camera bag along with several spare AA and AAA Eneloops. I also carry several spares in my purse. When a set of batteries run down, I pop in some of the spares, then recharge the discharged batteries later when it is convenient for me.

The charge Eneloops will not last as long as alkalines and regular NiMH rechargeables, but the fact that do not self-discharge while not in use and are not disposable make them well worth having.

Getting a good charger or two and the Eneloops may seem expensive upfront, but believe me, they will pay for themselves several times over. I'm as cheap as they come but even I can see that the Eneloops are a bargain in the long run.

Also, learning how to properly take care of batteries may be a bit of a PITA, but it's well worth taking the time to do so (it's really not that difficult).

Thanks!

I feel like I've read somewhere that for AA batteries it's actually better to not charge them the slowest possible, but to go for a more middle of the road approach. I understand it the way you are explaining it, but why would someone think it would be better for the battery to charge it a little bit faster?

Are there Eneloops out there that last as long as regular NiMH batteries?

Thanks!
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post #13 of 15
Quote:
Originally Posted by Gohan_Nightwing View Post

Thanks!

I feel like I've read somewhere that for AA batteries it's actually better to not charge them the slowest possible, but to go for a more middle of the road approach. I understand it the way you are explaining it, but why would someone think it would be better for the battery to charge it a little bit faster?...

Nope. The faster you charge a battery, the hotter it will get. Heat will kill batteries. Even just a little will shorten the lifespan of a battery so that is why it is important to keep the charging current as low as possible. A somewhat higher charge every once in a great while won't noticeably shorten life but why push one's luck? The reason I have two chargers is so I can charge more batteries in the same amount of time. It's also what I carry extra batteries. Instead of waiting for some batteries to charge, I just swap out the batteries and keep on doing what I was doing while the discharged batteries are being recharged. I've had Eneloops for several years and not a one has died on me; that's because I've taken care of them, mostly by keeping the charging current low.
Quote:
Originally Posted by Gohan_Nightwing View Post

.Are there Eneloops out there that last as long as regular NiMH batteries?

Thanks!

Yes and no. Eneloops have less capacity than the regular NiMHs. However, regular NiMHs start self-discharging as soon as they are removed from the charger; the ones I had had to be recharged every month. So, if you compared an Eneloop to a regular NiMH, say, two weeks after you had charged them, the Eneloop will have a higher charge than the regular NiMH. Keep in mind battery life is measured in the number of discharge and recharge cycles so, since the regular NiMH will probably have to be recharged more often, they most likely will not last as long as the Eneloops.

The upfront cost of Eneloops and good smart chargers is high but, in the long run, they will pay for themselves many, many times over.
     
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post #14 of 15
Eneloop's and PowerEx MH-C9000 charger - I use them and no issue.
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post #15 of 15
Quote:
Originally Posted by Gohan_Nightwing View Post

I'm looking to potentially buy a battery recharger for all those little household items that continuously need and drain batteries.

Battery Recharger
I'm suspicious of that charger because it's shown with alkaline batteries as well as NiCads and NiMHs. Alkaline batteries have to be recharged before they lose about 25% of their capacity (not voltage but capacity), but even if you're careful and do that, there's a good chance the alkalines can't be recharged more than about 10 times. Charging is very slow, like 24-36 hours (prevents explosions -- pressure can reach 70 PSI inside). Even alkaline cells designed specifically for recharging haven't fared well.

You can buy a decent charger for a much lower price. The ones from the major battery makers, like Duracell, Energizer, Sanyo/Panasonic, and Rayovac are decent, as are the Radio Shack brand chargers (but they also sell other brands). Definitely look for safety approval by UL, CSA, ETL, or TUV because unapproved stuff, including stuff with counterfeit certification marks, can be dangerous, as some of Ken Shirriff's teardowns have shown.
Edited by larymoencurly - 1/9/14 at 1:12am
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