Recommendations for rechargeable Ds & AAs please

[S4MadMan]

I'm looking to purchase some rechargeable batteries and was looking for some recommendations and advice.

Any comments about these:

Rechargeable Ds here.

TIA! /ubbthreads/images/graemlins/cool.gif

 

[vcal]

[ QUOTE ]
S4MadMan said:
I'm looking to purchase some rechargeable batteries and was looking for some recommendations and advice.

Any comments about these:
TIA! /ubbthreads/images/graemlins/cool.gif

[/ QUOTE ]
You do have to pay for that high capacity,..-just don't make the mistake of buying a cheap charger.

 

[S4MadMan]

I plan to purchase this charger:

The state of art battery charger. Extremely easy and fast.

Powered by an external AC adapter (output: 12V DC 800mA)included

Intelligent microprocessor controlled with negative delta V (- delta V) cut-off function to promise fully charging.

Use constant current pulse charging system

Each charging group is individual programmable in its function

Recharges various types of batteries : 1 to 4 pcs AAA, AA, C, D, or 1 to 2 pcs 9V cells. Recharges batteries in single or group.

NiMH and Ni-Cd batteries can be mixed to charge at the same time.

Automatic charge and discharge function

Automatic charge/discharge current selection for the different size of batteries

Identification of defective cells

With over temperature and short circuit protection

With protection against wrong polarity

Individual LED to indicate discharge, fast charge and trickle charge

With maximum charging timer control for overcharge protection

Charging time for different types of empty batteries as follow:



AAA size: rated capacity: 180mAh-700mAh; charging time: 1-3 1/2 hrs

AA size: rated capacity: 500mAh-1800mAh; charging time: 1 1/2-5 hrs

C size: rated Capacity: 1200mAh-2600mAh; charging time: 2 1/2-5 1/2 hrs

D size: rated capacity: 1200mAh-5000mAh; charging time: 3-10 1/2

9V block size: rated capacity: 100mAh-150mAh; charging time: 6-11 hrs

 

[vcal]

S4-I've looked at that charger lately-seems like a good investment to me.

If I didn't already have about 5 chargers, I think I'd bag one just like you picked out. /ubbthreads/images/graemlins/cool.gif

Let us know later what it's like to use it.

 

[shankus]

Could you provide a link to the charger? What is the price?

 

[LitFuse]

[ QUOTE ]
shankus said:
Could you provide a link to the charger? What is the price?

[/ QUOTE ]

$39.99


Peter

 

[Ginseng]

Re: Recommendations for rechargeable Ds & AAs plea

Those puny little D's? Try these...

Powerex UltraCapacity D

Wilkey

 

[FalconFX]

Re: Recommendations for rechargeable Ds & AAs plea

Those 11Ah Ds are really sweet... Things like the Helios lasts for a good, solid, bright 4 hours with those Ds...

 

[Short Circuit]

Re: Recommendations for rechargeable Ds & AAs plea

Now if there was a good charger that would charge the 11AH D cells in 12 hours or less.

Is there any such device?

 

[FalconFX]

Re: Recommendations for rechargeable Ds & AAs plea

Only if you go to your RC chargers, or your own bench power supply programmable charger. Otherwise, no chargers in the "form" of a "regular desktop" charger, ala a Vanson or CCrane, can do anything like that...

 

[LitFuse]

Re: Recommendations for rechargeable Ds & AAs plea

[ QUOTE ]
Short Circuit said:
Now if there was a good charger that would charge the 11AH D cells in 12 hours or less.

Is there any such device?

[/ QUOTE ]

Not exactly, but with the addition of a couple of battery holders the new MAHA 401 can be easily "modified" to accomplish this. This would give you 4 dedicated "smart" charging channels @ 1000mAh.


Peter

 

[Doug Owen]

Dangous Recommendation

[ QUOTE ]
LitFuse said:
[ QUOTE ]
Short Circuit said:
Now if there was a good charger that would charge the 11AH D cells in 12 hours or less.

Is there any such device?

[/ QUOTE ]

Not exactly, but with the addition of a couple of battery holders the new MAHA 401 can be easily "modified" to accomplish this. This would give you 4 dedicated "smart" charging channels @ 1000mAh.


[/ QUOTE ]

NO!

This is very dangerous advice. Check it out. Such chargers depend on 'seeing' the cell voltage *under change current* drop a couple dozen milivolts near charge end. At .3 C this drop is less than half the 60 or so mV is was at 1 C, at .1 C is all but disappears. This means no termination of charge, which kills the batteries on the first charge. More over, since there is zero chance that this external kluge will register the temperature rise of the cells and terminate the charge, a fire is a very real possibility.

There's a reason Maha doesn't sell such an adaptor (or put a D or C cell slot in the 401).

The information is out there, check out the LiMH section on the Eveready site like I just did before you consider free advice from someone guessing on the web......

Bad advice, IMO.

Doug Owen

 

[Christoph]

Re: Dangous Recommendation

I have an rc charger that does 1-36 cells at 1-5 amps off of a 12 v battery that should take less than 12 hours shouldn't it?
CHris

 

[LitFuse]

Re: Dangous Recommendation

[ QUOTE ]
Doug Owen said:
[ QUOTE ]
LitFuse said:
[ QUOTE ]
Short Circuit said:
Now if there was a good charger that would charge the 11AH D cells in 12 hours or less.

Is there any such device?

[/ QUOTE ]

Not exactly, but with the addition of a couple of battery holders the new MAHA 401 can be easily "modified" to accomplish this. This would give you 4 dedicated "smart" charging channels @ 1000mAh.


[/ QUOTE ]

NO!

This is very dangerous advice. Check it out. Such chargers depend on 'seeing' the cell voltage *under change current* drop a couple dozen milivolts near charge end. At .3 C this drop is less than half the 60 or so mV is was at 1 C, at .1 C is all but disappears. This means no termination of charge, which kills the batteries on the first charge. More over, since there is zero chance that this external kluge will register the temperature rise of the cells and terminate the charge, a fire is a very real possibility.

There's a reason Maha doesn't sell such an adaptor (or put a D or C cell slot in the 401).

The information is out there, check out the LiMH section on the Eveready site like I just did before you consider free advice from someone guessing on the web......

Bad advice, IMO.

Doug Owen

[/ QUOTE ]

Oops, my bad (advice). /ubbthreads/images/graemlins/ohgeez.gif
For the record, I haven't actually done this. (and don't recommend anyone try it, given this new info from Doug.)

Also, FWIW this wasn't an idea I came up with on my own. It was actually given to me by a MAHA CSR. /ubbthreads/images/graemlins/icon6.gif I was inquiring about a high current charger for the high capacity D's when she told me that MAHA was aware that some users were modifying the 401 to charge C and D cells. She didn't actually recommend that I do this, but she didn't say that I shouldn't either. She never mentioned that it could be potentially dangerous.

I guess we'll just have to wait until someone comes up with a new model charger to efficiently charge these new super capacity batteries.


Peter

 

[spookyspiff]

Re: Dangous Recommendation

Hi litfuse. See our thread regarding universal chargers. Is there some reason the one's we've mentioned don't meet your needs? I guess they'd be too slow.