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|Topic Review (Newest First)|
|10-15-2012 09:08 AM|
|10-15-2012 08:41 AM|
NiMHs are fairly trouble-free unless you abuse them, such as by storing them in the refrigerator or freezer, keep them connected to the charger all the time, or let them drain down too much. And with a battery, the main problem is that one of its cells develops reverse polarity, and that can't be corrected except by charging just that individual cell. Left uncorrected, that cell eventually rots, and because its voltage becomes zero, the other cells get overcharged.
|10-15-2012 07:37 AM|
I bought the charger used for 35 shipped.Here:
Question: You're suppose to drain nihm's all the way before charging; correct? I don't want to ruin my batteries anymore! It costs money and is time consuming.
|10-13-2012 01:19 PM|
|10-08-2012 07:34 AM|
|10-07-2012 06:33 PM|
|10-07-2012 03:10 PM|
|10-06-2012 11:02 AM|
charging nicd and mh are more wasteful to the environment then if you just brought regular alk batteries.
just recycle the regualr alk batteries or dispose of them since the materials inside are basically non-toxic and do break down in the environment
|10-06-2012 10:20 AM|
|10-06-2012 10:11 AM|
|gonepostl||That charger is soooo expensive. Anything cheaper that'll get the job done??|
|10-05-2012 07:19 PM|
|10-05-2012 04:50 PM|
You can trickle charge nicads and NiMHs for 14 hours at their capacity divided by 10 hours. IOW those AAA 160mA-H cells can be charged for 14 hours at 16 mA. The extra 4 hours is needed to make up for losses that go out as heat. If you leave the cells charging at that rate for a couple of days, it won't harm them. OTOH when cells are charge at much faster rates, it's important for the charger to shut off to prevent damage or even rupture (cells can build up over 70 PSI pressure). Fast chargers do this by measuring temperature, temperature difference, rate of temperature change, rate of voltage change (rise or fall), or rate of rate of voltage change. Don't buy a cheapo fast charger that plugs into 120VAC if it isn't safety certified by UL, CSA, TUV, or ETL. Also don't buy USB chargers that claim to fully charge a pair of dead AA cells much faster than 8 hours. Generally chargers put out by the major brand battery makers are good. Some of the China-designed products from DealExtreme, MeritLine, etc. are scary bad in design.
BTW those AAA cells could be rated for 160mA-H, but most likely the AA cells are rated for at least 1600mA-H. Most NiMH cells put out 1.25V, and while there are newer chemistries that put out slightly more, I don't think these Duracells are like that.
|10-05-2012 03:23 PM|
There is a reason the charger I recommended above costs a lot more, it's a lot better. It has a lot finer controls over power distribution, over charge circuit, and lots of logic built in. I would bet you money that if you bought a quality charger than your problems will go away with the new batteries. Highly recommended.
|10-05-2012 03:12 PM|
Sorry! Here's the charger!!
|10-05-2012 12:39 PM|
I would agree that the charger here matters. http://www.amazon.com/La-Crosse-T...ry+charger is a very popular charger and a very good one. it goes on sale too from time to time.
I personally have a good charger but not that good. I just can't justify spending that on a new better charger for what I do.
|This thread has more than 15 replies. Click here to review the whole thread.|