Ive used this configuration but noticed it could be a problem for battery longevity for it to be in contact with underside hot spots, which rear positioned or o

Ive used this configuration but noticed it could be a problem for battery longevity for it to be in contact with underside hot spots, which rear positioned or otherwise confined batteries can avoid. Also as a battery pack gets bigger, it can rather beg its own independence so that it can ergonomically free lap-weight, and charge other things too. For these reasons I prefer a universal brick to a power slice.