BIS Mandates Rated Capacity Verification for Lithium Batteries Under IS 16046 (Part 2)

Table of Content

Lithium Batteries

In a major regulatory update, the Bureau of Indian Standards (BIS), under the direction of the Ministry of Electronics and Information Technology (MeitY), has made rated capacity verification mandatory for lithium cells and batteries registered under IS 16046 (Part 2):2018.

This update comes after authorities identified multiple cases of misdeclaration of lithium battery capacity, where the printed mAh rating did not match actual discharge performance. To strengthen IS 16046 compliance and protect consumers, MeitY has directed that rated capacity must now be tested as per Clause 7.3.1 of IS 16047 (Part 3):2018 before granting or renewing lithium battery CRS registration.

Under the revised BIS lithium battery guidelines 2026, manufacturers and importers must conduct discharge performance testing at 20°C through BIS-recognized laboratories and report the measured capacity in the official test format. Without proper verification, BIS battery certification in India will not be granted or renewed beyond the prescribed deadline.

This move reinforces transparency, eliminates misleading capacity claims, and strengthens consumer protection in India’s rapidly growing electronics market.

What Is Clause 7.3.1 of IS 16047 (Part 3)? Understanding Rated Capacity Testing at 20°C

Clause 7.3.1 of IS 16047 (Part 3):2018 lays down the official IS 16047 Part 3 test method for verifying the rated capacity of portable sealed secondary lithium cells and batteries. Harmonized with IEC 61960-3 compliance, this provision mandates a standardized lithium battery rated capacity test to ensure that the declared mAh value reflects actual discharge performance.

Under this requirement, the battery is fully charged and then discharged at a specified current in a controlled laboratory environment at 20°C. The total electrical output delivered until the defined cut-off voltage is reached is measured in ampere-hours (Ah) or milliampere-hours (mAh). This measured output becomes the verified rated capacity.

Testing at 20°C is critical because battery performance varies with temperature. Using a fixed reference temperature ensures consistent, reliable, and comparable results across manufacturers while preventing exaggerated capacity claims.

With the latest compliance update from the Bureau of Indian Standards, verification under Clause 7.3.1 has become directly linked to IS 16046 (Part 2) compliance under the lithium battery CRS registration framework. While IS 16046 focuses on safety requirements, IS 16047 (Part 3) validates performance accuracy—together strengthening BIS lithium battery certification standards in India.

BIS CRS Compliance 2026–2027: Deadlines for Existing and New Licenses

The latest BIS CRS update 2026 sets strict timelines for rated capacity verification under IS 16046 (Part 2). Below is a clear summary of the lithium battery registration deadline in India and compliance requirements affecting BIS licence renewal 2027.

Category	Compliance Requirement	Deadline	Key Impact
Existing Licensees (Validity up to 30 April 2027)	Must complete rated capacity verification and submit third-party lab test reports	On or before 30 April 2027	Mandatory for BIS licence renewal 2027
Existing Licensees (Validity beyond 30 April 2027)	Must comply with Clause 7.3.1 before licence expiry date	Before licence validity ends	Required to maintain active CRS registration
All Existing Licensees	Generate LIMS request, submit revised test reports, file undertaking for remaining models	Within prescribed timeline	Non-compliance may lead to suspension or cancellation
New Applicants (Testing Already Completed)	Applications may be processed without additional rated capacity testing (if compliant)	As per application stage	Subject to document verification
New Applicants (Under Process)	Must submit undertaking to provide rated capacity test report before licence validity ends	Before licence issuance validity ends	Conditional approval allowed
Post–30 April 2027 (All Applicants)	No licence granted without mandatory rated capacity test reporting	Effective 1 May 2027	Strict enforcement of lithium battery compliance deadline

Under the regulatory framework of the Bureau of Indian Standards, rated capacity verification is now a permanent condition for lithium battery CRS registration in India. Early compliance is essential to avoid business disruption and ensure uninterrupted market access.

Step-by-Step Compliance Process for Lithium Battery Manufacturers

To meet the latest rated capacity verification requirements under IS 16046 (Part 2), manufacturers must follow a structured BIS CRS registration process for lithium batteries. Below is a clear, compliance-focused roadmap aligned with the updated BIS guidelines.

Generate LIMS Test Request : The first step is to raise a test request through the LIMS submission BIS portal. Manufacturers must select the applicable standard (IS 16046 Part 2) and initiate testing for rated capacity verification as per Clause 7.3.1 of IS 16047 (Part 3). Accurate product details and model information must be entered to avoid delays.
Conduct Third-Party Lab Testing : Rated capacity must be verified through third-party lab testing for lithium batteries in India at a BIS-recognized laboratory. The lab performs discharge performance testing at 20°C and measures the actual mAh output. The test report must clearly reference the earlier safety testing conducted under IS 16046 (Part 2).
File Application Through Standard Revision/Amendment Module : Once the test report is issued, manufacturers must apply online using the Standard Revision/Amendment module on the BIS portal. This step formally updates the licence scope to include compliance with rated capacity verification requirements.
Submit Compliance Undertaking : Licensees are required to submit an undertaking confirming that all remaining models under the licence comply with Clause 7.3.1 requirements. This declaration is mandatory for maintaining valid lithium battery CRS registration.
Update Unified Test Report Format : The measured rated capacity must be reported in the modified Unified Test Report Format prescribed by the Bureau of Indian Standards. Proper documentation ensures smooth BIS licence renewal and avoids regulatory action.

Consequences of Non-Compliance: Suspension, Cancellation & Model Deletion

Non-compliance with the updated rated capacity verification requirements under IS 16046 (Part 2) can lead to serious enforcement action by the Bureau of Indian Standards under the Compulsory Registration Scheme (CRS). Below is a clear breakdown of potential CRS non-compliance penalties and their business impact.

Non-Compliance Area	Regulatory Action	Business Impact
Failure to submit rated capacity test report	BIS licence suspension (lithium battery)	Immediate halt on manufacturing and sale
Non-compliance by deadline	BIS registration cancellation India	Loss of licence validity and need for fresh registration
Incomplete documentation / no LIMS update	Deletion of models from licence scope	Specific battery models cannot be sold in India
Misdeclaration of rated capacity	Regulatory investigation & penalty under CRS	Brand reputation damage and distributor distrust
Import without valid BIS certification	Customs detention or shipment rejection	Supply chain disruption and financial losses
Repeated violations	Possible long-term market restriction	Risk of effective market ban in India

Impact of New BIS Lithium Battery Rules on Importers & OEM Manufacturers

The updated compliance framework from the Bureau of Indian Standards significantly strengthens lithium battery import compliance in India and directly affects importers and OEM manufacturers.

Increased Testing Costs : Mandatory third-party battery capacity verification in India adds additional testing expenses for each lead model.
Higher Documentation Burden : LIMS submission, updated test reports, and compliance filings under the new BIS rules for importers 2026 increase regulatory workload.
Product Relabeling Risk : If tested capacity differs from declared mAh, packaging and product labels must be corrected before sale.
Supply Chain Adjustments :Importers must coordinate closely with overseas partners to ensure accurate declarations and full lithium battery OEM compliance.

How a Absolute Veritas Can Help With Lithium Battery CRS Registration?

With the latest regulatory changes, lithium battery manufacturers and importers face stricter verification, documentation, and reporting requirements under the Compulsory Registration Scheme (CRS). Partnering with an experienced BIS CRS consultant in India can simplify the process and reduce compliance risks.

End-to-End Compliance Handling : A professional lithium battery compliance consultant manages the entire certification lifecycle — from application review and technical documentation to final approval. This ensures smooth alignment with IS 16046 (Part 2) and Clause 7.3.1 rated capacity verification requirements.
Testing Coordination : Rated capacity testing must be conducted at BIS-recognized laboratories. A reliable lithium battery certification service coordinates sample submission, lab communication, test report review, and technical clarification to avoid rejections or delays.
LIMS Filing & Documentation Support : Accurate LIMS filing and BIS documentation support are critical for approval. Consultants handle online submissions, Standard Revision/Amendment applications, undertakings, and Unified Test Report updates to ensure error-free processing.
Scope Change & Model Inclusion Support :For manufacturers expanding product lines, consultants assist with scope extensions, lead model mapping, and compliance alignment to prevent licence complications.
BIS Licence Renewal Management :With the approaching 2027 compliance deadline, timely renewal and rated capacity verification are essential. Expert guidance ensures uninterrupted registration and protection against suspension or cancellation.

Frequently asked questions (FAQ)

What are the new BIS lithium battery guidelines 2026?

The Bureau of Indian Standards has mandated verification of rated capacity for portable sealed secondary lithium cells and batteries under IS 16046 (Part 2). As per the latest directive aligned with MeitY’s order, manufacturers must conduct discharge performance testing at 20°C in accordance with IS 16047 (Part 3) before maintaining or renewing their BIS CRS registration. This update strengthens lithium battery compliance in India and prevents misdeclaration of battery capacity.

Is rated capacity testing mandatory for BIS CRS registration?

Yes, rated capacity testing is now mandatory for lithium batteries registered under the Compulsory Registration Scheme (CRS). Manufacturers and importers must submit third-party laboratory test reports confirming actual discharge performance at 20°C. Without proper verification and updated documentation in LIMS, BIS licence renewal or new registration may not be granted after the enforcement deadline.

What is the deadline for lithium battery compliance in India?

Existing licensees must comply based on their licence validity, with a key enforcement milestone of 30 April 2027. After this date, no licence will be granted or renewed without submission of rated capacity test reports. Businesses should initiate compliance well in advance to avoid last-minute rejection, suspension, or cancellation risks.

What happens if a lithium battery fails rated capacity verification?

If the tested capacity does not match the declared mAh rating, manufacturers may need to correct product labeling, update packaging, and revise documentation. Continued non-compliance can lead to BIS licence suspension, cancellation of registration, or deletion of models from the approved scope, directly impacting market access in India.

Do importers also need BIS certification for lithium batteries?

Yes, lithium battery import compliance in India requires valid BIS CRS registration. Importers must ensure that overseas manufacturers complete rated capacity testing and documentation updates. Customs authorities may detain shipments if BIS certification is invalid, expired, or non-compliant with updated standards.