More on BTY batteries

[Bonky]

I made the sad, sad mistake of purchasing some cheap BTY brand batteries awhile back, thinking that even if they're not as good as advertised they'd at least be somewhat close.

I got 8 AAs and 8 AAAs for some obscenely low amount, shipped from somewhere in the orient. I forget where exactly.

The AAs are advertised as "2500".. no "mah" after that number, but the ebay listing said "2500 mah". The AAAs have "1000," again with no "mah" on them.

Whereas all my other Nimh AAs weigh 28-30g, these BTYs weigh in at 16g. Waaay lighter. The BTY AAAs are about 2g lighter than my other-branded AAAs. A little lighter.

So I did some testing recently on my LaCrosse and it turns out that, after a couple of chargings, the AAs have an average capacity of 450 to 500 mah. :mecry: The AAAs actually have MORE capacity than the AAs... around 600 mah.

The more disturbing part is that when put on the charger, the AAs will rise up to 1.8 volts before the charger stops charging them. This happens for all of them. I don't know why.

 

[shadowjk]

The more disturbing part is that when put on the charger, the AAs will rise up to 1.8 volts before the charger stops charging them. This happens for all of them. I don't know why.

Well, just think about it, the charger is trying to force power into the battery at rates meant for healthy AA cells, into a cell with the capacity of an AAA cell and the internal resistance of something worse than that... Voltage and temperature are bound to rise, I'd think

 

[Bonky]

So I just tried with another BTY batt charging at 1 amp and it went up to 1.96v then started hissing. I pulled it out and now it's sitting on a table spewing liquid from the top and making high pitched noises.

I don't think this is right

 

[ghx420]

I made the sad, sad mistake of purchasing some cheap BTY brand batteries awhile back, thinking that even if they're not as good as advertised they'd at least be somewhat close.

I got 8 AAs and 8 AAAs for some obscenely low amount, shipped from somewhere in the orient. I forget where exactly.

The AAs are advertised as "2500".. no "mah" after that number, but the ebay listing said "2500 mah". The AAAs have "1000," again with no "mah" on them.

Whereas all my other Nimh AAs weigh 28-30g, these BTYs weigh in at 16g. Waaay lighter. The BTY AAAs are about 2g lighter than my other-branded AAAs. A little lighter.

So I did some testing recently on my LaCrosse and it turns out that, after a couple of chargings, the AAs have an average capacity of 450 to 500 mah. :mecry: The AAAs actually have MORE capacity than the AAs... around 600 mah.

The more disturbing part is that when put on the charger, the AAs will rise up to 1.8 volts before the charger stops charging them. This happens for all of them. I don't know why.

This battery is not in good health.Perhaps it's resistence is high.And when you charged it,it became shorted inside it.

 

[Monocrom]

So I just tried with another BTY batt charging at 1 amp and it went up to 1.96v then started hissing. I pulled it out and now it's sitting on a table spewing liquid from the top and making high pitched noises.

I don't think this is right

For God sakes get rid of them. You already know they're crap. Why risk having one of them leak all over your charger?