I have an APC XS 1500VA unit that just finally failed on me (batteries crapping out). It's been quite useful, but power here has been less-than-good, mostly due to me tripping out a breaker roughly ...
Next-generation APC Smart-UPSâ„¢ runs on either VRLA or lithium-ion batteries and is engineered to support future battery chemistries, so customers can upgrade the battery without replacing the UPS ...