UPS with auto battery

[lzr1621]

Hi,
Anyone has any ideas about pitfalls on using a regular UPS for desktop PC with an external auto battery?
I am going to make a backup power source for my natural gas boiler (steam heating). So, I plan to use a conventional UPS (such as APC's ES350) and wire an auto battery parallel to UPS's battery for more capacity.
Could UPS's charger have any problem with auto battery (I presume they have a specific charging algorithm)? Any problems paralleling these different types of batteries?
Thanks,
Lazar

 

[OperaHouse]

That almost gives me a fond feeling for our old gas hot air system. Thermostat ran on about 60 thermocouples in series to generate the voltage and air circulation was gravity feed. Totally storm proof, but that pilot sucked up a lot of gas!

 

[itsmoked]

Yeah, and you probably had to huddle around it.

Did it leave a waffle pattern burned into your feet?

Keith Cress
Flamin Systems, Inc.-

http://www.flaminsystems.com