Global Lithium-Ion Battery Market : Industry Analysis and forecast 2027 : Type,Industry and Region.

Global Lithium-Ion Battery Market size was valued US$ XX Bn in 2019 and the total revenue is expected to grow at 14.23 % through 2020 to 2027, reaching US$ XX Bn. The report has covered Country Market trends with competitive landscape. The report covers an in-depth analysis of COVID 19 pandemic impact on Global Lithium-Ion Battery Marketby region and on the key players’ revenue affected till July 2020 and expected short term and long-term impact on the market. Global Lithium-Ion Battery Market To know about the Research Methodology :- Request Free Sample Report

Global Lithium-Ion Battery Market Overview:

The development of the market is attributed to the rising demand for the lithium-ion battery in Evs & grid storage as it compromises high-energy density solutions & lightweight. The subsequent rise in the registration of Electric vehicles & a decrease in the cost of the lithium-ion battery is expected to increase the market size during the forecast period. Also, a rise in sales of electric vehicles& change in user choices is likely to push the market growth towards north. The increasing number of photovoltaic installations & nuclear power plants, along with the beginning of the wind energy plans, is expected to push market development during the forecast period. Increasing off-grid installations in the United States, India, China, & Germany, along with the rising acceptance of Li-ion batteries in equipment used in the medical segment, is anticipated to inspire the market for lithium-ion battery during the forecast period. The lithium-ion battery is used in electronic devices like smartphones, power tools, & digital cameras. Therefore, the demand for the battery in the railway industries, manufacturing segments, & solar power is likely to surge the increasing need for storage & power backup. Long life span, reduction in battery costs, & high density will push the market for lithium-ion batteries during the forecast period. Growing demand for other types of batteries like lithium-air, flow battery, sodium nickel chloride, & lead-acid batteries in energy storage, consumer electronics, & electric vehicles is expected to restrain the market during the expected period. Also, inclination towards renewable energy for producing power was driven by rising apprehensions related to favourable government incentives, temperature change, decreasing batteries price, & the falling cost of solar photovoltaic cells. Increasing sales of EVs in China is anticipated to push the market for lithium-ion batteries during the forecast period due to government supports& purchase shares on non-electric vehicles in big cities. In addition, the presence of main EV companies, like Nissan, BMW, Tesla, Chevrolet, Ford, Toyota, & Fiat mostly in the US, UK, Germany, & China is expected to push market development. EV & HEVs will endure to observe development on account of the shift from fuels to electric batteries. Also, the government's strict rules on emission standards to keep the environment & decrease the degradation-based potentials are likely to play a serious role in influencing the market for lithium-ion batteries.

Segment Overview:

The consumer electronics sector held the largest market share of 28.24percent in the year 2019. The development of the segment is attributed to the growing use of lithium-ion batteries in portable consumer electronics devices owing to high energy density & safety levels. The automotive segment accounted for 18.74 percent of the global revenue in the year 2019. The industrial segment is anticipated to rule the lithium-ion battery market & is likely to value USD 24.8 Bn by 2027. The consumer electronics application segment was valued at USD 8.6 billion in 2019 owing to the high reliability & durability of the lithium-ion battery in appliances like smartphones & laptops. The rising electronics industry in countries such as South Korea, Japan, China, & Taiwan is likely to push the market for lithium-ion batteries during the expected period. Industrial application valued over USD 11.3 Bn in 2019 & is anticipated to witness aprojected CAGR of over 11.12 percent from 2020 to 2027.

Competitive Landscape

The MMR reports cover key developments in the Lithium-Ion Battery Marketas organic and inorganic growth strategies. Various companies are focusing on organic growth strategies such as product approvals product launches, and others. Inorganic growth strategies activities witnessed in the Lithium-Ion Battery Marketwere merges & acquisitions and collaborations & partnership. The objective of the report is to present a comprehensive analysis of the Global Lithium-Ion Battery Marketincluding all the stakeholders of the industry.The past and current status of the industry with forecasted market size and trends are presented in the report with the analysis of complicated data in simple language. The report covers all the aspects of the industry with a dedicated study of key players that includes market leaders, followers and new entrants. PORTER, SVOR, PESTEL analysis with the potential impact of micro-economic factors of the market has been presented in the report. External as well as internal factors that are supposed to affect the business positively or negatively have been analyzed, which will give a clear futuristic view of the industry to the decision-makers. The report also helps in understanding Global Lithium-Ion Battery Marketdynamics, structure by analyzing the market segments and projects the Global Lithium-Ion Battery Marketsize. Clear representation of competitive analysis of key players by End Use, price, financial position, Product portfolio, growth strategies, and regional presence in the Global Lithium-Ion Battery Market make the report investor’s guide.

Global Lithium-Ion Battery, Key Highlights:

• Global Lithium-Ion Battery analysis and forecast, in terms of value. • Comprehensive study and analysis of market drivers, restraints and opportunities influencing the growth of the Global Lithium-Ion Battery • Global Lithium-Ion Battery segmentation on the basis of type, source, end-user, and region (country-wise) has been provided. • Global Lithium-Ion Battery strategic analysis with respect to individual growth trends, future prospects along with the contribution of various sub-market stakeholders have been considered under the scope of study. • Global Lithium-Ion Battery analysis and forecast for five major regions namely North America, Europe, Asia Pacific, the Middle East & Africa (MEA) and Latin America along with country-wise segmentation. • Profiles of key industry players, their strategic perspective, market positioning and analysis of core competencies are further profiled. • Competitive developments, investments, strategic expansion and competitive landscape of the key players operating in the Global Lithium-Ion Battery are also profiled.

Scope of the Global Lithium-Ion Battery Market: Inquire before buying

Global Lithium-Ion Battery Market1

Global Lithium-Ion Battery Market, By Region

• North America: o US o Canada o Mexico • South America o Brazil o Argentina o Colombia o Rest of South America • Europe o UK o Germany o France o Spain o Italy o Sweden o CIS countries o Rest of Europe • APAC o China o India o South Korea o Japan o Australia o Rest of APAC o ASEAN  Indonesia  Malaysia  Singapore  Philippines  Thailand  Vietnam • Middle East & Africa o GCC Countries o South Africa o Nigeria o Egypt o Rest of MEA • Latin America o Mexico o Brazil o Rest of Latin America

Global Lithium-Ion Battery Market Key players :

• BYD COMPANY • LG CHEM • PANASONIC CORPORATION • SAMSUNG SDI • BAK GROUP • GS YUASA CORPORATION • HITACHI • JOHNSON CONTROLS • TOSHIBA CORPORATION • LITHIUM WERKS • BYD Company Ltd. • A123 Systems LLC • Hitachi Chemical Co., Ltd. • Shenzhen Huayu New Energy Technology Co., Ltd. • NEC Corporation, • Saft • Sony Corporation • Tesla Inc. • Narada Power Source Co., Ltd. • Contemporary Amperex Technology Co.

Global Lithium-Ion Battery Market

1. Preface 1.1. Report Scope and Market Segmentation 1.2. Research Highlights 1.3. Research Objectives 2. Assumptions and Research Methodology 2.1. Report Assumptions 2.2. Abbreviations 2.3. Research Methodology 2.3.1. Secondary Research 2.3.1.1. Secondary data 2.3.1.2. Secondary Sources 2.3.2. Primary Research 2.3.2.1. Data from Primary Sources 2.3.2.2. Breakdown of Primary Sources 3. Executive Summary: Global Lithium-Ion Battery Market Size, by Market Value (US$ Bn) 4. Market Overview 4.1. Introduction 4.2. Market Indicator 4.2.1. Drivers 4.2.2. Restraints 4.2.3. Opportunities 4.2.4. Challenges 4.3. Porter’s Analysis 4.4. Value Chain Analysis 4.5. Market Risk Analysis 4.6. SWOT Analysis 4.7. Industry Trends and Emerging Technologies 5. Supply Side and Demand Side Indicators 6. Global Lithium-Ion Battery MarketAnalysis and Forecast 7. Global Lithium-Ion Battery Market Analysis and Forecast, by Type 7.1. Introduction and Definition 7.2. Key Findings 7.3. Global Lithium-Ion Battery Market Value Share Analysis, by Type 7.4. Global Lithium-Ion Battery MarketSize (US$ Bn) Forecast, by Type 7.5. Global Lithium-Ion Battery Market Analysis, by Type 7.6. Global Lithium-Ion Battery Market Attractiveness Analysis, by Type 8. Global Lithium-Ion Battery Market Analysis and Forecast, by Industry 8.1. Introduction and Definition 8.2. Key Findings 8.3. Global Lithium-Ion Battery Market Value Share Analysis, by Industry 8.4. Global Lithium-Ion Battery MarketSize (US$ Bn) Forecast, by Industry 8.5. Global Lithium-Ion Battery Market Analysis, by Industry 8.6. Global Lithium-Ion Battery Market Attractiveness Analysis, by Industry 9. Global Lithium-Ion Battery MarketAnalysis and Forecast, by Region 9.1. Introduction and Definition 9.2. Key Findings 9.3. Global Lithium-Ion Battery MarketValue Share Analysis, by Region 9.4. Global Lithium-Ion Battery MarketSize (US$ Bn) Forecast, by Region 9.5. Global Lithium-Ion Battery MarketAnalysis, by Region 10. Global Lithium-Ion Battery MarketAnalysis 10.1. Key Findings 10.2. Global Lithium-Ion Battery MarketOverview 10.3. Global Lithium-Ion Battery Market Forecast, by Type 10.3.1. Li-NMC 10.3.2. LFP 10.3.3. LCO 10.3.4. LTO 10.4. Global Lithium-Ion Battery Market Forecast, by Industry 10.4.1. Consumer Electronics 10.4.2. Automotive 10.4.3. Marine 10.4.4. Aerospace and Defense 10.4.5. Medical 10.4.6. Industrial 10.4.7. Power 10.4.8. Telecom 10.5. Global Lithium-Ion Battery MarketForecast, by Region 10.5.1. North America 10.5.2. Europe 10.5.3. Asia-Pacific 10.5.4. MEA & Africa 10.5.5. Latin America 10.6. PEST Analysis 10.7. Key Trends 10.8. Key Developments 11. North-America Lithium-Ion Battery Market Analysis 11.1. Key Findings 11.2. North America Lithium-Ion Battery Market Forecast, by Type 11.2.1. Li-NMC 11.2.2. LFP 11.2.3. LCO 11.2.4. LTO 11.3. North America Lithium-Ion Battery Market Forecast, by Industry 11.3.1. Consumer Electronics 11.3.2. Automotive 11.3.3. Marine 11.3.4. Aerospace and Defense 11.3.5. Medical 11.3.6. Industrial 11.3.7. Power 11.3.8. Telecom 11.4. North-America Lithium-Ion Battery Market Forecast, by Country 11.4.1. US 11.4.2. Canada 11.5. US Lithium-Ion Battery Market Forecast, by Type 11.5.1. Li-NMC 11.5.2. LFP 11.5.3. LCO 11.5.4. LTO 11.6. US Lithium-Ion Battery Market Forecast, by Industry 11.6.1. Consumer Electronics 11.6.2. Automotive 11.6.3. Marine 11.6.4. Aerospace and Defense 11.6.5. Medical 11.6.6. Industrial 11.6.7. Power 11.6.8. Telecom 11.7. Canada Lithium-Ion Battery Market Forecast, by Type 11.7.1. Li-NMC 11.7.2. LFP 11.7.3. LCO 11.7.4. LTO 11.8. Canada Lithium-Ion Battery Market Forecast, by Industry 11.8.1. Consumer Electronics 11.8.2. Automotive 11.8.3. Marine 11.8.4. Aerospace and Defense 11.8.5. Medical 11.8.6. Industrial 11.8.7. Power 11.8.8. Telecom 11.9. PEST Analysis 11.10. Key Trends 11.11. Key Developments 12. Europe Lithium-Ion Battery Market Analysis 12.1. Key Findings 12.2. Europe Lithium-Ion Battery MarketOverview 12.3. Europe Lithium-Ion Battery Market Forecast, by Type 12.3.1. Li-NMC 12.3.2. LFP 12.3.3. LCO 12.3.4. LTO 12.4. Europe Lithium-Ion Battery Market Forecast, by Industry 12.4.1. Consumer Electronics 12.4.2. Automotive 12.4.3. Marine 12.4.4. Aerospace and Defense 12.4.5. Medical 12.4.6. Industrial 12.4.7. Power 12.4.8. Telecom 12.5. Europe Lithium-Ion Battery Market Forecast, by Country 12.5.1. UK 12.5.2. France 12.5.3. Germany 12.5.4. Russia 12.5.5. Italy 12.5.6. Rest of Europe 12.6. UK Lithium-Ion Battery Market Forecast, by Type 12.6.1. Li-NMC 12.6.2. LFP 12.6.3. LCO 12.6.4. LTO 12.7. UK Lithium-Ion Battery Market Forecast, by Industry 12.7.1. Consumer Electronics 12.7.2. Automotive 12.7.3. Marine 12.7.4. Aerospace and Defense 12.7.5. Medical 12.7.6. Industrial 12.7.7. Power 12.7.8. Telecom 12.8. France Lithium-Ion Battery Market Forecast, by Type 12.8.1. Li-NMC 12.8.2. LFP 12.8.3. LCO 12.8.4. LTO 12.9. France Lithium-Ion Battery Market Forecast, by Industry 12.9.1. Consumer Electronics 12.9.2. Automotive 12.9.3. Marine 12.9.4. Aerospace and Defense 12.9.5. Medical 12.9.6. Industrial 12.9.7. Power 12.9.8. Telecom 12.10. Germany Lithium-Ion Battery Market Forecast, by Type 12.10.1. Li-NMC 12.10.2. LFP 12.10.3. LCO 12.10.4. LTO 12.11. Germany Lithium-Ion Battery Market Forecast, by Industry 12.11.1. Consumer Electronics 12.11.2. Automotive 12.11.3. Marine 12.11.4. Aerospace and Defense 12.11.5. Medical 12.11.6. Industrial 12.11.7. Power 12.11.8. Telecom 12.12. Russia Lithium-Ion Battery Market Forecast, by Type 12.12.1. Li-NMC 12.12.2. LFP 12.12.3. LCO 12.12.4. LTO 12.13. Russia Lithium-Ion Battery Market Forecast, by Industry 12.13.1. Consumer Electronics 12.13.2. Automotive 12.13.3. Marine 12.13.4. Aerospace and Defense 12.13.5. Medical 12.13.6. Industrial 12.13.7. Power 12.13.8. Telecom 12.14. Italy Lithium-Ion Battery Market Forecast, by Type 12.14.1. Li-NMC 12.14.2. LFP 12.14.3. LCO 12.14.4. LTO 12.15. Italy Lithium-Ion Battery Market Forecast, by Industry 12.15.1. Consumer Electronics 12.15.2. Automotive 12.15.3. Marine 12.15.4. Aerospace and Defense 12.15.5. Medical 12.15.6. Industrial 12.15.7. Power 12.15.8. Telecom 12.16. Rest of Europe Lithium-Ion Battery Market Forecast, by Type 12.16.1. Li-NMC 12.16.2. LFP 12.16.3. LCO 12.16.4. LTO 12.17. Rest of Europe Lithium-Ion Battery Market Forecast, by Industry 12.17.1. Consumer Electronics 12.17.2. Automotive 12.17.3. Marine 12.17.4. Aerospace and Defense 12.17.5. Medical 12.17.6. Industrial 12.17.7. Power 12.17.8. Telecom 12.18. PEST Analysis 12.19. Key Trends 12.20. Key Developments 13. Asia-Pacific Lithium-Ion Battery Market Analysis 13.1. Key Findings 13.2. Asia-Pacific Lithium-Ion Battery MarketOverview 13.3. Asia-PacificLithium-Ion Battery Market Forecast, by Type 13.3.1. Li-NMC 13.3.2. LFP 13.3.3. LCO 13.3.4. LTO 13.4. Asia-PacificLithium-Ion Battery Market Forecast, by Industry 13.4.1. Consumer Electronics 13.4.2. Automotive 13.4.3. Marine 13.4.4. Aerospace and Defense 13.4.5. Medical 13.4.6. Industrial 13.4.7. Power 13.4.8. Telecom 13.5. Asia-Pacific Lithium-Ion Battery Market Forecast, by Country 13.5.1. China 13.5.2. India 13.5.3. Japan 13.5.4. Malaysia 13.5.5. Indonesia 13.5.6. Rest of Asia-Pacific 13.6. China Lithium-Ion Battery Market Forecast, by Type 13.6.1. Li-NMC 13.6.2. LFP 13.6.3. LCO 13.6.4. LTO 13.7. China Lithium-Ion Battery Market Forecast, by Industry 13.7.1. Consumer Electronics 13.7.2. Automotive 13.7.3. Marine 13.7.4. Aerospace and Defense 13.7.5. Medical 13.7.6. Industrial 13.7.7. Power 13.7.8. Telecom 13.8. India Lithium-Ion Battery Market Forecast, by Type 13.8.1. Li-NMC 13.8.2. LFP 13.8.3. LCO 13.8.4. LTO 13.9. India Lithium-Ion Battery Market Forecast, by Industry 13.9.1. Consumer Electronics 13.9.2. Automotive 13.9.3. Marine 13.9.4. Aerospace and Defense 13.9.5. Medical 13.9.6. Industrial 13.9.7. Power 13.9.8. Telecom 13.10. Japan Lithium-Ion Battery Market Forecast, by Type 13.10.1. Li-NMC 13.10.2. LFP 13.10.3. LCO 13.10.4. LTO 13.11. Japan Lithium-Ion Battery Market Forecast, by Industry 13.11.1. Consumer Electronics 13.11.2. Automotive 13.11.3. Marine 13.11.4. Aerospace and Defense 13.11.5. Medical 13.11.6. Industrial 13.11.7. Power 13.11.8. Telecom 13.12. ASEAN Lithium-Ion Battery Market Forecast, by Type 13.12.1. Li-NMC 13.12.2. LFP 13.12.3. LCO 13.12.4. LTO 13.13. ASEAN Lithium-Ion Battery Market Forecast, by Industry 13.13.1. Consumer Electronics 13.13.2. Automotive 13.13.3. Marine 13.13.4. Aerospace and Defense 13.13.5. Medical 13.13.6. Industrial 13.13.7. Power 13.13.8. Telecom 13.14. Rest of APAC Lithium-Ion Battery Market Forecast, by Type 13.14.1. Li-NMC 13.14.2. LFP 13.14.3. LCO 13.14.4. LTO 13.15. Rest of APAC Lithium-Ion Battery Market Forecast, by Industry 13.15.1. Consumer Electronics 13.15.2. Automotive 13.15.3. Marine 13.15.4. Aerospace and Defense 13.15.5. Medical 13.15.6. Industrial 13.15.7. Power 13.15.8. Telecom 13.16. PEST Analysis 13.17. Key Trends 13.18. Key Developments 14. MEA & Africa Lithium-Ion Battery Market Analysis 14.1. Key Findings 14.2. MEA &Africa Lithium-Ion Battery Market Overview 14.3. MEA &AfricaLithium-Ion Battery Market Forecast, by Type 14.3.1. Li-NMC 14.3.2. LFP 14.3.3. LCO 14.3.4. LTO 14.4. MEA &AfricaLithium-Ion Battery Market Forecast, by Industry 14.4.1. Consumer Electronics 14.4.2. Automotive 14.4.3. Marine 14.4.4. Aerospace and Defense 14.4.5. Medical 14.4.6. Industrial 14.4.7. Power 14.4.8. Telecom 14.5. MEA &Africa Lithium-Ion Battery MarketForecast, by Country 14.5.1. GCC 14.5.2. South Africa 14.5.3. Rest of MEA & Africa 14.6. GCC Lithium-Ion Battery Market Forecast, by Type 14.6.1. Li-NMC 14.6.2. LFP 14.6.3. LCO 14.6.4. LTO 14.7. GCC Lithium-Ion Battery Market Forecast, by Industry 14.7.1. Consumer Electronics 14.7.2. Automotive 14.7.3. Marine 14.7.4. Aerospace and Defense 14.7.5. Medical 14.7.6. Industrial 14.7.7. Power 14.7.8. Telecom 14.8. South Africa Lithium-Ion Battery Market Forecast, by Type 14.8.1. Li-NMC 14.8.2. LFP 14.8.3. LCO 14.8.4. LTO 14.9. South Africa Lithium-Ion Battery Market Forecast, by Industry 14.9.1. Consumer Electronics 14.9.2. Automotive 14.9.3. Marine 14.9.4. Aerospace and Defense 14.9.5. Medical 14.9.6. Industrial 14.9.7. Power 14.9.8. Telecom 14.10. Rest of MEA &Africa Lithium-Ion Battery Market Forecast, by Type 14.10.1. Li-NMC 14.10.2. LFP 14.10.3. LCO 14.10.4. LTO 14.11. Rest of MEA &Africa Lithium-Ion Battery Market Forecast, by Industry 14.11.1. Consumer Electronics 14.11.2. Automotive 14.11.3. Marine 14.11.4. Aerospace and Defense 14.11.5. Medical 14.11.6. Industrial 14.11.7. Power 14.11.8. Telecom 14.12. PEST Analysis 14.13. Key Trends 14.14. Key Developments 15. Latin America Lithium-Ion Battery Market Analysis 15.1. Key Findings 15.2. Latin America Lithium-Ion Battery MarketOverview 15.3. Latin AmericaLithium-Ion Battery Market Forecast, by Type 15.3.1. Li-NMC 15.3.2. LFP 15.3.3. LCO 15.3.4. LTO 15.4. Latin AmericaLithium-Ion Battery Market Forecast, by Industry 15.4.1. Consumer Electronics 15.4.2. Automotive 15.4.3. Marine 15.4.4. Aerospace and Defense 15.4.5. Medical 15.4.6. Industrial 15.4.7. Power 15.4.8. Telecom 15.5. Mexico Lithium-Ion Battery Market Forecast, by Type 15.5.1. Li-NMC 15.5.2. LFP 15.5.3. LCO 15.5.4. LTO 15.6. Mexico Lithium-Ion Battery Market Forecast, by Industry 15.6.1. Consumer Electronics 15.6.2. Automotive 15.6.3. Marine 15.6.4. Aerospace and Defense 15.6.5. Medical 15.6.6. Industrial 15.6.7. Power 15.6.8. Telecom 15.7. Brazil Lithium-Ion Battery Market Forecast, by Type 15.7.1. Li-NMC 15.7.2. LFP 15.7.3. LCO 15.7.4. LTO 15.8. Brazil Lithium-Ion Battery Market Forecast, by Industry 15.8.1. Consumer Electronics 15.8.2. Automotive 15.8.3. Marine 15.8.4. Aerospace and Defense 15.8.5. Medical 15.8.6. Industrial 15.8.7. Power 15.8.8. Telecom 15.9. Rest of Latin America Lithium-Ion Battery Market Forecast, by Type 15.9.1. Li-NMC 15.9.2. LFP 15.9.3. LCO 15.9.4. LTO 15.10. Rest of Latin America Lithium-Ion Battery Market Forecast, by Industry 15.10.1. Consumer Electronics 15.10.2. Automotive 15.10.3. Marine 15.10.4. Aerospace and Defense 15.10.5. Medical 15.10.6. Industrial 15.10.7. Power 15.10.8. Telecom 15.11. PEST Analysis 15.12. Key Trends 15.13. Key Developments 16. Company Profiles 16.1. Market Share Analysis, by Company 16.2. Market Share Analysis, by Region 16.3. Market Share Analysis, by Country 16.4. Competition Matrix 16.4.1. Competitive Benchmarking of key players by price, presence, Market share, Raw material and R&D investment 16.4.2. New Raw material Launches and Raw material Enhancements 16.4.2.1. Market Consolidation 16.4.2.2. M&A by Regions, Investment and Raw material 16.4.2.3. M&A Key Players, Forward Integration and Backward Integration 16.5. Company Profiles: Key Players 16.5.1. BYD COMPANY 16.5.2. LG CHEM 16.5.3. PANASONIC CORPORATION 16.5.4. SAMSUNG SDI 16.5.5. BAK GROUP 16.5.6. GS YUASA CORPORATION 16.5.7. HITACHI 16.5.8. JOHNSON CONTROLS 16.5.9. TOSHIBA CORPORATION 16.5.10. LITHIUM WERKS. 16.5.11. BYD Company Ltd. 16.5.12. A123 Systems LLC 16.5.13. Hitachi Chemical Co., Ltd. 16.5.14. Shenzhen Huayu New Energy Technology Co., Ltd. 16.5.15. NEC Corporation, 16.5.16. Saft 16.5.17. Sony Corporation 16.5.18. Tesla Inc. 16.5.19. Narada Power Source Co., Ltd. 16.5.20. Contemporary Amperex Technology Co. 17. Primary Key Insights.

About This Report

Report ID18858
Category Energy & Power
Published DateAug 2019
Updated DateNov 2020
Contact Us