The energy density was buried in the article despite comparing it in every other aspect to Li-Ion batteries. > the GMG-UQ cell reaches [...] 160 Wh/kg accordin

The energy density was buried in the article despite comparing it in every other aspect to Li-Ion batteries. > the GMG-UQ cell reaches [...] 160 Wh/kg according to tests For comparison Lithium-Ion batteries reach 260 Wh/kg, but they charge much slower.