Honestly, batteries of any kind. Only buy from the manufacturers of the product the batteries work with. If it’s underpriced on Amazon, it’s probably a fucked up battery that has a higher risk of starting an electrical fire. Portable tool batteries, ebike batteries, handheld system batteries.
Anything involving safety.
As an example: Phone or laptop batteries.
Honestly, batteries of any kind. Only buy from the manufacturers of the product the batteries work with. If it’s underpriced on Amazon, it’s probably a fucked up battery that has a higher risk of starting an electrical fire. Portable tool batteries, ebike batteries, handheld system batteries.
I’m not fucking around with unsafe batteries.