Since when do UPS 12V batteries list watts / cell now instead of Ah?

[Elixer]

or

34W @ 15min-rate to 1.67V per cell @25C (77F)
8.5 Ah @ 20hr-rate to 1.75V per cell

My old batteries are 12V, 9Ah.
These are listed as watts/cell?

I know HR is for high rate, and those are meant for UPS systems.

I find this a really odd way to label a battery.

 

[LTC8K6]

http://www.csb-battery.com/upfiles/dow01461118814.pdf

Looks like the CSB battery is around 6Ah.
Constant current to 60 minutes is about 6 amps.

 

[Elixer]

I finally found a pdf for the other one located here http://www.atbatt.com/amfilerating/file/download/file_id/714/

And here is the battery itself http://www.atbatt.com/amstron-hr1234wf2fr-high-rate-agm-battery.asp
They list it as Amstron 12V 34W SLA Battery (12V 9Ah) but the spec sheet shows that is for 30 mins, so actual Ah is 5.7 or so.

Pretty lame tactic to pass these off as 9Ah when it isn't even close.

 

[XavierMace]

Where are they being passed off as 9Ah?

 

[Elixer]

Where are they being passed off as 9Ah?

I did e-mail them and ask, and while they did change the original description, it was listed as Amstron 12V 34W SLA Battery (12V 9Ah). They corrected the top, description, but not the bottom. Still waiting for a response from them.

http://www.atbatt.com/amstron-hr1234wf2fr-high-rate-agm-battery.asp then hit additional information at the bottom, and it shows

 

[Elixer]

I just got a e-mail from them, they said it is 9Ah, but, looking at the pdf specs of the battery:

So, who are they trying to fool here?

 

[LTC8K6]

They are using the 20 hour rate, which is another common way to rate the batteries.

.450A X 20H = 9Ah

 

[Elixer]

Thanks, didn't know about that.

 

[Elixer]

They are using the 20 hour rate, which is another common way to rate the batteries.

.450A X 20H = 9Ah

BTW, where did you get .450A from? That spec sheet above says 9. 00 A H /0. 350 @ 20H, so wouldn't .350A * 20H = 7Ah?

 

[Mark R]

BTW, where did you get .450A from? That spec sheet above says 9. 00 A H /0. 350 @ 20H, so wouldn't .350A * 20H = 7Ah?

The image you posted shows 0.450 A for the 20 hour rate to 1.60 V/cell (bottom right cell).