HOLLAND, Mich. (WZZM) -- Battery production at LG Chem's Holland plant is at a standstill again.

In a statement sent to WZZM 13 News, company spokesman Jeremy Hagemeyer says LG Chem Michigan Inc. is temporarily suspending production of lithium ion batteries, after finding out an ingredient used in the batteries may not be properly registered with the Environmental Protection Agency. The production delay is expected to last about six weeks while the EPA reviews the registration status.

Hagemeyer says during the delay, LG Chem workers will take part in improvement projects and specialized training. He says the company is "very confident" that it willrestart production soon.

LG Chem produced its first lithium ion battery in July, after a two year delay because of a lack of demand. The company, which received $150 million in federal stimulus money for the plant, reimbursed the government $842,000 in wages paid to workers who were watching movies, playing cards and volunteering on company time.