I see a ton of cheap 12V lipo batteries for sale on Ebay, but other than the mAh rating, I can't find any info or datasheets on how to safely operate them. I'm looking for a good battery to power a couple of small gear motors, so I'd like to know the maximum safe continuous discharge rate. I've emailed several of these retailers, which all seem to be based in China, and everyone one of them has basically said, "sorry, we don't know". These batteries are interesting in that they include a compact built-in charging circuit, and I'm no where near confident enough to design my own. However, the lack of documentation makes me nervous.
Are these cheap Chinese batteries junk, or can they be used safely? Is there somewhere that provides a basic datasheet for them?
A lot of guides I've read on how to safely use lipo batteries read like you're handling a bomb that might explode at any moment. e.g. "never leave unattended" and "always store in a fireproof container". Are these concerns still justified? A lot of cellphones and laptops include these batteries and don't come with similar warnings. I just don't want to plug in one of these Chinese batteries to charge overnight and wake-up to a house fire.