mrdl@cooltoad.com wrote:
So why don't you just keep the internal SLA as a bypass?

Hi Fred,
What do you mean by "bypass"? I have replaced these batteries since
they only give me 20-30 minutes run-time. When the power fails, the
UPS connected to my PC will keep it running until I use the 2nd UPS
with the large external batteries to power the UPS protecting my PC.
This way I could keep my PC running for up to 12 hours without
interruption.

Is there any other way to solve my problem, besides using very large
caps?

Cheers,
Ben


It may be that your big batteries are not fully charged.
The charger in the UPS was capable of charging 7 AH
batteries, but may not be able to give the 65 AH batteries
a full charge.

And may also be delivering a LOT of ripple while they attempt to

Please don't be rude.