Hi all,

First time posting on this forum, please don't kill me if question is dumb

I have Ni-MH Battery pack (Eztec 9.6V 600mAH). This pack is about 5 years old, and does not hold any reasonable charge anymore.
Is it possible to replace it with pack of "Amazon basics AA batteries"?

Thank you,
Andrew

 

You should be a able to replace them with NiMH types (those you referenced are non-rechargeable alkaline) unless there are more than two wires from the charger to the battery pack, indicating there is some type of monitoring circuit..
In that case, you would need to open the battery case and see if you can substitute the new batteries.

8 NiMh cells will give you 9.2V nominal.

 

You should be a able to replace them with NiMH types (those you referenced are non-rechargeable alkaline) unless there are more than two wires from the charger to the battery pack, indicating there is some type of monitoring circuit..
In that case, you would need to open the battery case as see if you can substitute the new batteries.

8 NiMh cells will give you 9.2V nominal.

Thank you. Will do

 

The Amazon alkaline batteries have ZERO spec's so how can you compare them to Name-Brand alkaline batteries that have detailed spec's?
Modern AAA Ni-MH cells are better (800mAh) than your larger (you said AA) and lower spec (you said 600mAh) cells.
The charger might not detect full charge then turn off. It might simply have a timer then a modern battery will never have a full charge.

 

The Amazon alkaline batteries have ZERO spec's so how can you compare them to Name-Brand alkaline batteries that have detailed spec's?
Modern AAA Ni-MH cells are better (800mAh) than your larger (you said AA) and lower spec (you said 600mAh) cells.
The charger might not detect full charge then turn off. It might simply have a timer then a modern battery will never have a full charge.

I suppose it charger have timer, nothing will help. Name or NoName... I hope new AA Ni-MH will do the trick.

 

I hope new AA Ni-MH will do the trick.

It would appear the original batteries are smaller than that.

 

I opened the box and it looks like 8*AA battery

 

The label on the battery says Ni-MH which are made in AA and AAA sizes.

 

I opened the box and it looks like 8*AA battery

Okay, then standard AA NiMH's should work.

Are you buying a battery holder to make the connections between all the batteries, like one of these?

 

I need to fit in in original box. I am planning to solder them together the same way as originals.

 

The original batteries are flash-welded with almost no heat. If you solder to batteries then you might (probably) melt the plastic insulation inside.

 

The original batteries are flash-welded with almost no heat. If you solder to batteries then you might (probably) melt the plastic insulation inside.

Thank you! I wouldn't even think about temperature!
I have soldering tool that have regulated temperature. Will this do the trick? What temperature should I use?

 

High quality batteries might have a corrosion resistant stainless steel case that you cannot solder. Trying will melt plastic insulation inside because soldering is at a temperature too high for plastics.
EDIT: Modern AAA batteries are smaller but are even better than the original AA size cells. Can you fit 8 AAA cells and their holder in?

 

I can't find any 8*AAA batteries holder, unfortunately. Will have to give a try to soldering, and if it will fail, then will try to get AAA holder somewhere...

Thank you

 

I can't find any 8*AAA batteries holder

What about this?

 

I have had the battery contacts in cheap battery holders like that melt through the plastic because the springs are too weak to make good connections.

 

and this is wrong size... i would need flat one. can get 2 holders 4*AAA, but again not sure if it will fit properly.
I could try to fix connectors to the original box, and then push AA batteries into it.

 

You can buy AA NIMH batteries with solder-tabs.

 

Didn't know those exists Thank you

 

The problem with soldering to the batteries is that it melts the plastic seals and then the battery dries out and fails in a fairly short time, just a few weeks..