BIS Testing for Lithium-Ion Batteries: Tests, Process and Documents You Need in 2026

• BIS testing for lithium-ion batteries is compulsory under the Compulsory Registration Scheme (CRS) for portable sealed cells and batteries.
• The main standard is IS 16046 (Part 2):2018, aligned with IEC 62133-2.
• Testing must be done at a BIS-recognised lab in India before you apply.
• BIS has also asked for rated capacity verification, so check the latest guidelines before you test.
• Registration is usually model-wise, so each model needs attention.
• Foreign manufacturers can apply with an Authorised Indian Representative.

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Introduction

If you make, import or sell lithium-ion batteries in India, you’ve heard this one: “Bhai, BIS number nahi hai toh listing hi nahi hogi.” It’s true for most portable batteries.

The confusing part isn’t the registration. It’s the testing. Which standard? Which lab? Cell or battery pack? And what is this rated capacity check everyone is talking about? Most first-timers lose weeks right here.

Think of a lithium-ion battery as a small packet of stored energy. Used well, it powers your phone for years. Built badly, it can swell, leak, heat up and even catch fire. So the lab doesn’t just look at it. It charges it, overcharges it, crushes it, short-circuits it and heats it.

Here’s what we’ll cover in plain words: what the testing means, which standard applies, the tests, the process, documents, timeline and the mistakes we see again and again.

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What Is BIS Testing for Lithium-Ion Batteries?

In simple terms, your cell or battery is tested against the Indian Standard for portable sealed secondary lithium cells and batteries. The goal is straightforward. It should be safe to carry, charge and use every day.

The requirement comes under the Electronics and IT Goods (Requirements for Compulsory Registration) Order. After your samples pass at a BIS-recognised lab and BIS accepts your application, you get a registration number. You then print the Standard Mark and that number on the product. No registration, no legal sale.

One important point. This is CRS, which is different from the ISI licence with factory inspection that many other products follow.

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Which Standard Applies to Lithium-Ion Batteries?

Standard	What it covers
IS 16046 (Part 1):2018	Safety of portable sealed secondary cells and batteries, nickel systems
IS 16046 (Part 2):2018	Safety of portable sealed secondary cells and batteries, lithium systems (aligned with IEC 62133-2)

For lithium-ion, Part 2 is the one that matters. It covers lithium-ion cells, lithium-polymer cells and the battery packs made from them for portable use.

A simple example. A battery for a smartphone, laptop or power bank falls in the portable group. A large traction battery for an electric vehicle is a different story and usually follows other rules. So please confirm your product’s category before testing.

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Why BIS Testing for Lithium-Ion Batteries Is Important

Nobody enjoys extra compliance, we know. But batteries are one of the riskiest parts of any gadget.

• Fire and burn safety: Poor cells can overheat or burst.
• Legal need: Selling unregistered batteries can lead to action under the BIS Act, 2016.
• Customs clearance: Imported batteries without registration can get stuck at the port.
• Market access: Online platforms and retailers ask for the BIS registration number.
• Customer trust: Buyers now check labels, especially for phones and power banks.

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What Tests Are Conducted for Lithium-Ion Batteries?

The exact list depends on whether you submit a cell or a battery pack. Roughly, the tests fall in these groups.

1. Electrical abuse tests

• External short circuit
• Overcharge
• Forced discharge

2. Mechanical tests

• Drop test
• Crush and impact tests
• Vibration and shock, where required

3. Thermal tests

The battery is exposed to high temperature to see whether it leaks, swells or catches fire.

4. Continuous charging and performance checks

The lab checks behaviour under continuous charge. BIS has also issued guidelines on rated capacity verification, so the declared capacity should match the tested one. Confirm the latest requirement with your lab before you start.

5. Construction and marking checks

Ratings, polarity, warnings, model name and later the Standard Mark with the registration number. Funny but true: a battery can pass every safety test and still get stuck because of wrong labels.

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Cell vs Battery Pack: What Changes

Product	What to keep in mind
Lithium-ion cell	Tested as a cell; the report supports packs made from it
Battery pack	Needs pack-level tests, including protection circuit behaviour
Power bank or phone battery	May also need the end product’s own registration

Tell the lab clearly what you are submitting. A wrong scope means a wrong report.

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Rated Capacity Verification: What It Means

Every battery has a number printed on it, like 5000 mAh. That is the rated capacity. In the past, some products claimed more than they could really deliver. BIS has issued guidelines asking for the rated capacity to be checked in a BIS-recognised lab, along with the safety tests.

In simple words, the capacity on your label should match what the lab measures. If your label says one number and the lab finds a much lower one, expect trouble.

What you can do:

• Measure the capacity in-house first.
• Print only the number you can prove.
• Ask your lab how they run the capacity test and what tolerance they accept.

Since this requirement has been updated recently, confirm the latest wording with your lab or BIS before you test.

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What Does the Lab Look at in a Battery Pack?

A cell is just the core. A pack adds a protection circuit, wiring, a case and connectors. Each extra part adds its own risk.

• Protection circuit: Does it cut off during overcharge, over-discharge and short circuit?
• Cell matching: Are all the cells in the pack of the same type and quality?
• Casing: Does it hold up in drop and crush tests?
• Connectors and wiring: Any loose joints, exposed metal or wrong polarity?
• Cell source: Is the cell inside the pack properly tested and traceable?

One last thing. Buy cells from a supplier who can give clear documents. A pack is only as safe as its weakest cell.

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Testing at a BIS-Recognised Lab

Under CRS, the report comes from a BIS-recognised laboratory in India. In-house checks are good for quality, but they don’t replace this report.

• The lab must be recognised for IS 16046 (Part 2).
• Send final production samples, not prototypes.
• Send the right number of samples with correct model details.

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Tips Before You Send Samples

A little homework here saves weeks later.

• Send final production samples, with the same cells, circuit and case you will sell.
• Check that the model name and rating match across the sample, the application and the label.
• Keep the cell supplier details, circuit diagram and critical component list ready.
• Charge and test a few units yourself first, to catch easy failures.
• Ask the lab how many samples it needs and how long it will take, before you dispatch.
• Pack samples safely. Lithium batteries have their own transport rules, so check with your courier.

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Step-by-Step Process for BIS Registration

This is the usual flow. Details can shift with the latest BIS circulars.

1. Identify your product. Cell, pack or end product.
2. Check the Order and the standard. Confirm current requirements.
3. Choose a BIS-recognised lab.
4. Send samples for testing.
5. Get the test report. If any test fails, fix the design and test again.
6. Prepare documents. Application, report, product and brand details.
7. Apply on the BIS portal.
8. Reply to BIS queries.
9. Get the registration number. Then print the Standard Mark and number on the product.

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Labelling and Marking: Small Things That Cause Big Delays

Many files get stuck for a boring reason. The label. Check these before you print.

• Model name and rating, exactly as in the test report
• Manufacturer name and address
• Polarity marks and warning text about heat, fire and damage
• Standard Mark and registration number, once granted
• Batch or date code, so each unit can be traced

Tip: show the label design to your lab or consultant before you print in bulk.

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Documents Usually Needed

The list can change, so confirm it before applying.

• BIS application form and declaration forms
• Test report from a BIS-recognised lab
• Product details, ratings and critical component list
• Brand or trademark details, with an authorisation letter if needed
• Manufacturer and factory details
• For foreign makers, Authorised Indian Representative details
• Label design showing the marking

Tip: keep model names and ratings identical across the report, application and label.

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Which Route Is Right for You?

Who you are	Route
Indian manufacturer	Register your models under your brand
Foreign manufacturer	Apply with an Authorised Indian Representative
Importer	Import only batteries with a valid BIS registration
Private-label brand	Make sure registration covers your brand name

Simple rule: no registration, no Standard Mark, and no mark, no legal sale.

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BIS Registration Validity, Changes and Renewal

Registration is not a lifetime pass. Keep these points in mind.

• Note the validity period on your registration and set a reminder well before it ends.
• A new model, a change of cell supplier, a circuit change or new ratings may need an update or fresh testing.
• A new brand name needs separate attention.
• Keep test reports, purchase records and label samples in one folder.
• BIS can pick market samples, so every batch should match the registered model.

Rules on validity and changes get revised from time to time, so confirm the current rules when renewal comes up.

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How Long Does BIS Testing for Lithium-Ion Batteries Take?

There’s no fixed number. Anyone promising an exact date is just guessing. A few things decide it.

• How ready your documents and samples are
• Lab schedule and whether any test fails
• Number of models
• How fast you reply to BIS queries

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Cost of BIS Testing for Lithium-Ion Batteries

Cost isn’t the same for every battery. These things push it up or down:

• Cell or pack, and the number of tests
• Number of models
• Lab charges and BIS fees
• Retesting if a sample fails
• Authorised Indian Representative fees for foreign makers

My suggestion: ask for a clear breakup before you start.

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Common Mistakes to Avoid

We keep seeing these, again and again.

• Confusing CRS with ISI. Batteries follow CRS.
• Wrong lab. Check recognition for IS 16046 (Part 2).
• Testing a prototype. The final production model counts.
• Ignoring rated capacity. Declared and tested capacity should match.
• Weak labelling. Missing marks can hold up your file.
• Forgetting models. Each model needs attention.
• Forgetting the end product. Phones and power banks may need their own registration.

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Who Needs This?

Indian manufacturers: Register your models before you sell.

Importers: You can’t just import and sell. The battery must carry a valid registration.

Private-label brands: If someone else makes batteries for your brand, make sure the registration covers your brand.

Overseas manufacturers: You need registration too, with an Authorised Indian Representative.

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Why Choose Diligence Certifications for BIS testing for lithium-ion batteries Certification?

Battery compliance feels heavy, especially the first time. Diligence Certifications works with manufacturers, importers and private-label brands on BIS certification, so the process stays clear and organised. Here is where we can support you:

• Checking which standard applies to your cell or pack
• Guiding you on the sample plan and lab testing
• Helping with documents and the BIS application
• Supporting you with query replies

Want the full picture for your battery type? Our BIS certification service page explains how we work. We don’t promise approvals, because approval depends on your product and your compliance. What we do is keep the process clear and organised.

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Conclusion

Don’t leave BIS testing for lithium-ion batteries for the last minute. The standard is published, the process is clear, and registration is a must before you sell.

First, fix your product type. Then pick the right recognised lab and keep documents consistent. And please, double-check the latest BIS circulars before you apply. Rules do get updated.

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Frequently Asked Questions