There are newer LFP portable batteries with <10ms UPS switch times that charge quickly and will keep the power on longer. They also have much longer battery life’s (3000+ cycles) , and LFP cells don’t degrade the same when kept at 100% like other types, although you should still cycle them a few times a year.
Bluetti makes some, the elite series has their latest UPS features. The non elite are slower and noisier.
Its all fairly new and have been improving year over year. For example, earlier models may not have switched back on if power was out for a long time and it fully drained the battery. Now some models can turn back on.
There are newer LFP portable batteries with <10ms UPS switch times that charge quickly and will keep the power on longer. They also have much longer battery life’s (3000+ cycles) , and LFP cells don’t degrade the same when kept at 100% like other types, although you should still cycle them a few times a year.
Bluetti makes some, the elite series has their latest UPS features. The non elite are slower and noisier.
Its all fairly new and have been improving year over year. For example, earlier models may not have switched back on if power was out for a long time and it fully drained the battery. Now some models can turn back on.
Edit: more details.