I need to replace the original 'RBC6' battery in my APC Smart-UPS 1000 (SUA1000) unit.

What brand/model batteries do you recommend?

I understand there are many cheap poorly made choices.

On two ends of the cost spectrum I'm currently looking at:

Powersonic PS-12120
[url]http://www.power-sonic.com/index.php?id=31&gr_id=40[/url]

American Battery Co
[url]http://www.americanbatterycompany.com/batteries/apc/rbc6.htm[/url]

I've found the Powersonic available very inexpensively.
[url]http://www.amazon.com/gp/product/B0002ILK0Y/ref=olp_product_details?ie=UTF8&me=&seller=[/url]...