The last two posts say it all. Some HAT UPSs may be badly designed. That does not make them all unsafe, unless it can be shown that there is a common design fault.
tl;dr: Let us have factual information which we can all use to stay safe around LiPo/Li-ion systems.
Here is a possible (probable?) issue, but what do we actually know about the design issues on HAT UPSs? Is there a general problem, or is it only certain brands? Or are the designs okay, but another issue (LiPo manufacture?) is causing random failures? In either case, the consumer safety authorities should act, either to get products withdrawn or to reassure consumers. But any statements or actions need to be based on informed, technical, factual information backed by accident statistics. Or is it that the failures do not actually cause serious consequences? Maybe the message is just that any LiPo/Li-ion system should be placed in a fire-resistant housing?From the description it would appear to be a LiPo pack, using Li-Ion or LiPo in a UPS is bordering on suicidal unless they limit charge to 80% which is unlikely. Even the robust Lead-acid AGM batteries have a high failure rate in UPSs, using the more delicate Lithium technologies is nothing but dangerous.
tl;dr: Let us have factual information which we can all use to stay safe around LiPo/Li-ion systems.
Statistics: Posted by davidcoton — Sun Jul 27, 2025 8:44 am