Aside from those by HP and Apple, Greenpeace said in a statement said it tested purchased laptop models from Acer, Dell and Sony. The test was conducted by an independent Danish laboratory, which checked the presence of hazardous substances in a variety of internal and external components.
According to a Greenpeace study, the lab findings on HP's laptop registered high levels of Polybrominated Diphenylethers (PBDE is a class of Brominated flame retardants or BFRs), including decabromodiphenyl ether (decaBDE) in the fan. Lead was also found in the soldering.