SEOUL—Samsung Electronics Co's. a worldwide review of its most up to date cell phone after a portion of the gadgets burst into flames has put a focus on the innovation mammoth's battery-production offshoot.

Samsung SDI Co. said Monday it was a supplier of batteries utilized as a part of Galaxy Note 7 telephones, which the world's greatest cell phone producer pulled from racks in one of the cell phone industry's greatest reviews, declared Friday.

Samsung SDI declined to remark on its part or the effect of the review on its business.

Samsung Electronics additionally depends on another supplier, Hong Kong-based Amperex Technology Ltd., a unit of Japanese electronic parts creator TDK Corp. An Amperex official said Monday it just supplied batteries for Galaxy Note 7 telephones sold in China. Samsung Electronics proceeded with the dispatch of the new telephones in China on Sept. 1 even as it completed extra quality tests in South Korea in light of reports of a few gadgets finding fire while charging.

About 65% of the batteries for the new cell phone were supplied by Samsung SDI, while 35% were made by Amperex Technology, Nomura expert Chris Chang evaluated.

Offers in Samsung SDI kept on declining Monday taking after news of the review. On Monday its shares fell 2.8% to close at KRW 105,500. Samsung Electronics offers shut everything down.

Samsung Electronics is reviewing around 2.5 million Galaxy Note 7 gadgets, in a huge review that examiners foresee could cost the organization about KRW 1 trillion ($904 million). Samsung Electronics declined to put an evaluation on the money related effect of the review. The organization said it might look for a third supplier past the two organizations it depends on for lithium-particle battery supply. The review comes as adversary Apple Inc. is slated to dispatch another iPhone in the not so distant future.

Samsung SDI was recorded as an Apple supplier in the U.S. organization's suppliers' rundown for 2016. Samsung SDI declined to remark when asked whether it at present supplies batteries to Apple.

At the point when gotten some information about its battery suppliers, an Apple representative said Tuesday: "We don't utilize the same battery cell sort as the reviewed Samsung Note 7. And the majority of our items surpass the most noteworthy quality measures and are unaffected by this deformity."

Samsung makes cell phone battery cells in Cheonan, South Korea and Tianjin, China, however, bundles them in the organization's Vietnam processing plant and through a Chinese branch of South Korea-based ITM Semiconductor Co. Ltd.

Samsung SDI started producing lithium-particle rechargeable batteries in 2000 and is right now one of the world's greatest makers by the piece of the overall industry.

Samsung Electronics' handset division boss Koh Dong-jin told journalists on Friday that the reported blasts in its Galaxy Note 7 gadgets were created by a defect in the battery cell and had nothing to do with the telephone itself. Samsung, in the same way as other handset producers, utilizes lithium-particle batteries as a part of its cell phones because of their light weight and dependable force. Lithium-particle batteries, additionally generally utilized as a part of portable PCs and even planes, are involved force creating segments called cells.

In the Galaxy Note 7, an imperfection in the battery cell brought about negative and positive terminals meeting up which is anomalous, Mr. Koh said.

"There was a minor imperfection in the battery producing process," said Mr. Koh, including that "the quality control benchmarks in the generation procedure may have been inadequate."

Issues in a similarity of the telephone's battery and chip could have additionally assumed a part while charging the battery rapidly, a man acquainted with the circumstance said.

Investigators said that the pattern of quick charging cell phones may have added to the Galaxy Note 7 blazes. China's Oppo turned into the quickest developing major cell phone mark this year to a limited extent because of a noteworthy promoting push in which it touted, "Charge your telephone for five minutes, talk for two hours."

Other significant brands, including Samsung, have been moving to quick charge handsets, however, they increment the shot of battery issues because of the high charge voltage, examiners said.

The review could hit Samsung's working benefit in the second 50% of the year, an essential offering season spreading over the back-to-class and Christmas occasion when income is generally the most grounded for innovation organizations.

C.W. Chung, an expert at Nomura, anticipates that Samsung's working benefit will take a hit by KRW 1 trillion in the third and fourth quarters joined. Mr. Chung gauges the review cost alone to be around KRW 400 billion.

Samsung lost an extraordinary window of chance to support its force before Apple's new cell phone discharge, said Peter Yu, an expert at BNP Paribas.

"Be that as it may, it won't at last hurt Samsung. The organization may offer a couple of million fewer telephones, yet it didn't lose its image picture from the worldwide review, and that is the thing that matters over the long haul, " said Mr. Yu.

In July, Samsung reported its most productive quarter in about two years as solid offers of the littler lead Galaxy S7 helped deals and lift edges.