Came here to mention this. I used this exact setup (used a laptop battery bank off of amazon as a UPS for my home modem), and came home months later to find the

Came here to mention this. I used this exact setup (used a laptop battery bank off of amazon as a UPS for my home modem), and came home months later to find the bank had caught fire at some point, melted, and was no longer functional. Would not recommend