Lithium batteries are everywhere these days, and the media whips up these stories about their danger.
I carry one in my pocket all day, and have no worries about having one in my Morgan. Avoid cheap no-name Chinese junk (e-bikes and scooters mostly fall into this category), and buy from a reputable maker.
I have the Anti Gravity model also and can highly recommend it. The extra CCA really help, and it is remarkably light.
